Notices
Federal Communications Commission Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
•
•
This device may not cause harmful interference, and
This device must accept any interference received including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with manufacturer’s instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
•
•
•
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment to an outlet on a circuit different from that to which the receiver is
connected.
•
Consult the dealer or an experienced radio/TV technician for help.
The use of shielded cables for connection of the monitor to the graphics card is required
to assure compliance with FCC regulations. Changes or modifications to this unit not
expressly approved by the party responsible for compliance could void the user’s authority
to operate this equipment.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from
digital apparatus set out in the Radio Interference Regulations of the Canadian Department
of Communications.
This class B digital apparatus complies with Canadian ICES-003.
DO NOT throw the motherboard in municipal waste. This product has been designed to
enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin
indicates that the product (electrical and electronic equipment) should not be placed in
municipal waste. Check local regulations for disposal of electronic products.
DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol
of the crossed out wheeled bin indicates that the battery should not be placed in municipal
waste.
vi
Safety information
Electrical safety
•
To prevent electrical shock hazard, disconnect the power cable from the electrical outlet
before relocating the system.
•
When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
•
•
•
Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.
Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.
Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.
•
If the power supply is broken, do not try to fix it by yourself. Contact a qualified service
technician or your retailer.
Operation safety
•
•
•
•
Before installing the motherboard and adding devices on it, carefully read all the manuals
that came with the package.
Before using the product, ensure that all cables are correctly connected and the power
cables are not damaged. If you detect any damage, contact your dealer immediately.
To avoid short circuits, keep paper clips, screws, and staples away from connectors,
slots, sockets and circuitry.
Avoid dust, humidity, and temperature extremes. Do not place the product in any area
where it may become wet.
•
•
Place the product on a stable surface.
If you encounter technical problems with the product, contact a qualified service
technician or your retailer.
About this guide
This user guide contains the information you need when installing and configuring the
motherboard.
How this guide is organized
This guide contains the following parts:
•
Chapter 1: Product introduction
This chapter describes the features of the motherboard and the new technology it
supports.
•
Chapter 2: BIOS setup
This chapter tells how to change system settings through the BIOS Setup menus.
Detailed descriptions of the BIOS parameters are also provided.
vii
Conventions used in this guide
To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.
DANGER/WARNING Information to prevent injury to yourself
:
when trying to complete a task.
CAUTION: Information to prevent damage to the components
when trying to complete a task.
IMPORTANT: Instructions that you MUST follow to complete a
task.
NOTE: Tips and additional information to help you complete a
task.
Where to find more information
Refer to the following sources for additional information and for product and software
updates.
1.
ASUS websites
The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.
2.
Optional documentation
Your product package may include optional documentation, such as warranty flyers,
that may have been added by your dealer. These documents are not part of the
standard package.
Typography
Bold text
Italics
Indicates a menu or an item to select.
Used to emphasize a word or a phrase.
<Key>
Keys enclosed in the less-than and greater-than sign means
that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
<Key1>+<Key2>+<Key3>
If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+).
Example: <Ctrl>+<Alt>+<D>
Command
Means that you must type the command exactly as shown,
then supply the required item or value enclosed in
brackets.
Example: At the DOS prompt, type the command line:
afudos /i[filename]
afudos /iM3N78CM.ROM
viii
M3N78-CM specifications summary
CPU
AMD socket AM2+ / AM2 for AMD Phenom™FX /
Phenom™ / Athlon™ / SempronTM processors
AMD64 architecture enables simultaneous 32-bit and
64-bit computing
Supports AMD Cool ‘n’ Quiet™ Technology
Support CPU up to 140W
NVIDIA® GeForce® 8200 (MCP78S)
Chipset
System bus
Up to 5200 MT/s HyperTransport™ 3.0 interface for
AM2+ CPU; 2000/1600 MT/s for AM2 CPU
Memory
Dual-channel memory architecture 4 x 240-pin DIMM
sockets support up to 8 GB of unbufferred ECC and
non-ECC 1066 / 800 / 667 / 533 MHz DDR2 memory
modules
Notes:
•
Due to AMD CPU limitation, DDR2 1066 is supported by AM2+
CPU for one DIMM per channel only.
•
When installing total memory of 4GB capacity or more,
Windows® 32-bit operation system may only recognize less
than 3GB. Hence, a total installed memory of less than 3GB is
recommended.
•
List.)
Expansion slots
Storage
1 x PCI Express™ x16 slot
1 x PCIe x 1 slot
2 x PCI slots
Southbridge
-
-
1 x Ultra DMA 133 / 100 interface
6 x Serial ATA 3 Gb/s hard disk drives supporting
RAID 0, RAID 1, RAID 5, RAID 0+1, and JBOD
configuration
High Definition Audio
VT1708B High Definition Audio 8-channel CODEC
Supports S/PDIF out interface, Jack-detect and multi-
streaming
USB
LAN
Supports up to 10 USB 2.0/1.1 ports (6 ports
at mid-board, 4 ports at back panel)
NVIDIA® nForce built-in Gigabit MAC with external
Realtek8211CL PHY
BIOS
8 Mb Flash ROM, AMI BIOS, PnP, DMI2.0, WfM2.0,
SM BIOS 2.5, ACPI 2.0a
ASUS Overclocking
Features
Precision Tweaker:
-
vDIMM: 8-step DRAM voltage control
Stepless Frequency Selection (SFS):
SB tuning up to 300MHz at 1MHz increment
Overclocking Protection:
-
-
ASUS CPU Parameter Recall (C.P.R.)
(continued on the next page)
ix
M3N78-CM specifications summary
Back panel I/O ports
1 x LAN (RJ-45) port
1 x COM port
1 x DVI port
6 x USB 2.0 / 1.1 ports
1 x VGA Out port
1 x PS/2 keyboard port
8-channel audio ports
Internal I/O connectors
1 x High Definition front panel audio connector
1 x IDE connector
1 x Floppy disk drive connector
1 x CD audio-in connector
1 x CPU fan connector
1 x Chassis fan connector
1 x LPT connector
6 x SATA connectors
1 x S/PDIF Out connector
3 x USB 2.0 connectors for 6 additional USB 2.0 ports
1 x 24-pin EATX power connector
1 x 4-pin x ATX 12V power connector
1 x System panel connector
ASUS Unique Features
ASUS Express Gate:
-
Access the Internet in 5-second* boot time without
entering Windows
-
A built-in OS offers instant fun platform for Internet
and Instant Messenger
* The actual boot time depends on the system configuration.
ASUS Quiet Thernal Solution:
-
ASUS Q-Fan
ASUS EZ DIY:
-
-
ASUS CrashFree BIOS 3
ASUS EZ Flash 2
Other Feature:
-
-
ASUS MyLogo 2™
AI NET 2
Accessories
2 x SATA cables
2 x power cables
1 x UltraDMA 133 / 100 / 66 cable
1 x Floppy Disk Drive cable
1 x I/O Shield
User’s manual
Form Factor
Support DVD
MicroATX: 9.6 in. x 9.6 in. (24.4 cm x 24.4 cm)
Device drivers
Express Gate
ASUS PC Probe II
ASUS Update utility
Anti-virus software (OEM version)
*Specifications are subject to change without notice.
x
Chapter 1
Product introduction
1.1
Welcome!
Thank you for buying an ASUS® M3N78-CM motherboard!
The motherboard delivers a host of new features and latest technologies, making it another
standout in the long line of ASUS quality motherboards!
Before you start installing the motherboard, and hardware devices on it, check the items in
your package with the list below.
1.2
Package contents
Check your motherboard package for the following items.
Motherboard
Cables
ASUS M3N78-CM motherboard
2 x Serial ATA cables
2 x power cables
1 x Ultra DMA 133 / 100 cable
1 x Floppy disk drive cable
Accessories
1 x I/O shield
Application DVD
Documentation
ASUS motherboard support DVD
User guide
If any of the above items is damaged or missing, contact your retailer.
1.3
Special features
1.3.1
Product highlights
AMD socket AM2+ Phenom FX / Phenom
The motherboard supports AMD socket AM2+ multi-core processors. It features dual-
channel DDR2 1066 memory support and accelerates data transfer rate up to 5200 MT/s via
HyperTransport 3.0 based system bus. See page 1-7 for details.
AMD socket AM2 Athlon 64 /
Athlon 64 X2 / Athlon 64 FX / Sempron
The motherboard supports AMD socket AM2 Athlon 64 / Athlon 64 X2 / Athlon 64 FX
/ Sempron processors with 2MB / 1MB / 512KB L2 cache, which is based on 64-bit
architecture. It features 2000 / 1600 MT/s HyperTransport System Bus, dual-channel
un-buffered DDR2 memory support and AMD Cool ‘n’ Quiet Technology. See page 1-7 for
details.
Chapter 1: Product introduction
1-1
AMD Cool ‘n’ Quiet Technology
The motherboard supports the AMD Cool ‘n’ Quiet Technology, which monitors system
operation and automatically adjusts CPU voltage and frequency for a cool and quiet
operating environment.
Dual channel DDR2 1066 support
This motherboard supports DDR2 1066. It provides faster data transfer rate and more
bandwidth to increase memory data transfer rate and computing efficiency, enhancing system
performance in 3D graphics and other memory demanding applications. See pages 1-10 for
details.
DDR2 1066 is for AM2+ only.
Gigabit LAN solution
Gigabit LAN is the networking standard for the early future and is ideal for handling large
amounts of data such as video, audio, and voice. See page 1-17 for details.
Serial ATA 3Gb/s technology
The motherboard supports next-generation SATA hard drives based on the new SATA 3Gb/s
storage specification.
High Definition Audio
Enjoy high-end sound quality on your PC! The onboard 8-channel HD audio (High Definition
Audio, previously codenamed Azalia) CODEC enables high-quality 192KHz / 24-bit audio
output, jack-detect feature.
64-bit CPU support
64-bit computing, the technology to replace 32-bit architecture, delivers advanced system
performance, faster memory access and increased productivity. This motherboard provides
excellent compatibility and flexibility by supporting either 64-bit or 32-bit architecture.
DVITM Interface
DVI (Digital Visual Interface) provides high visual quality of digital display devices such as
LCD monitor. The interface of this motherboard is HDCP compliant, allowing playback of HD
DVD, Blu-ray Disc and other protected content.
HyperTransportTM 3.0 support
HyperTransportTM 3.0 technology provides 2.6 times more bandwith than HyperTransportTM
1.0, radically improving system efficiency to create a smoother, faster computing
environment.
1-2
ASUS M3N78-CM
NVIDIA® GeForce® 8200
The NVIDIA® GeForce® 8200 offers the lastest support of Hybrid SLI technology,
DirectX10 graphics features, HD video playback with HDMI / DVI output. It also supports
HyperTransport TM 3.0 interface, PCI ExpressTM 2.0 bus architecture, Serial ATA 3 GB/s
devices, and is optimized with AMD’s latest AM2+ and multi-core CPUs to provide excellent
system performance.
Hybrid SLITM
Hybrid SLITM technology is a unique hybrid multi-GPU technology built upon NVIDIA. Hybrid
SLI technology today includes two primary feaures: GeForce Boost and HybridPowerTM
GeForce Boost turbo-charges performance of NVIDIA descrete graphics cards when
combined with this series motherboard GPUs. HybridPowerTM unleashed graphics
.
performance when needed and enabled discrete GeForce GPU(s) to the motherboard GPU
for a quiet, low power PC experience.
NVIDIA get the Hybrid SLI function prepared.
PCI Express 2.0 support
The motherboard supports the latest PCI Express 2.0 devices for double speed and
bandwidth which enhances system performance.See page 1-15 for details.
1.3.2
Innovative ASUS features
ASUS MyLogo2™
Turn your favorite photos into 256-color boot logos to personalize your system. See page
2-21 for details.
ASUS CrashFree BIOS 3
The ASUS CrashFree BIOS 3 allows users to restore corrupted BIOS data from a USB
flash disk containing the BIOS file. This utility saves users the cost and hassle of buying a
replacement BIOS chip. See page 2-5 for details.
ASUS EZ Flash 2
EZ Flash 2 is a user-friendly BIOS update utility. Simply launch this tool and update BIOS
from a USB flash disk before entering the OS. You can update your BIOS only in a few clicks
without preparing an additional floppy diskette or using an OS-based flash utility. See page
2-3 for details.
ASUS Q-Fan
ASUS Q-Fan technology intelligently adjusts CPU fan speeds according to system loading to
ensure quiet, cool and efficient operation.
Chapter 1: Product introduction
1-3
Green ASUS
This motherboard and its packaging comply with the European Union’s Restriction on the
use of Hazardous Substances (RoHS). This is in line with the ASUS vision of creating
environment-friendly and recyclable products/packaging to safeguard consumers’ health
while minimizing the impact on the environment.
C.P.R. (CPU Parameter Recall)
The C.P.R. feature of the motherboard BIOS allows automatic re-setting to the BIOS default
settings in case the system hangs due to overclocking. When the system hangs due to
overclocking, C.P.R. eliminates the need to open the system chassis and clear the RTC data.
Simply shut down and reboot the system, and the BIOS automatically restores the CPU
default setting for each parameter.
Express Gate
Taking only 5 seconds to go online from bootup, Express Gate is the one-stop gateway to
instant fun! It’s a unique motherboard built-in OS. You can utilize the most popular Instant
Messengers (IM) like MSN, Skype, Google talk, QQ, and Yahoo! Messenger to keep in touch
with friends, or quickly check on the weather and e-mails just before leaving your house.
What’s more, the user-friendly picture manager lets you view your pictures without entering
Windows at anytime!
•
•
The actual boot time depends on the system configuration.
ASUS Express Gate supports file uploading from SATA HDDs, ODDs and USB drive and
downloading to USB drives only.
1.4
Before you proceed
Take note of the following precautions before you install motherboard components or change
any motherboard settings.
•
•
Unplug the power cord from the wall socket before touching any component.
Use a grounded wrist strap or touch a safely grounded object or a metal object, such
as the power supply case, before handling components to avoid damaging them due to
static electricity
•
•
Hold components by the edges to avoid touching the ICs on them.
Whenever you uninstall any component, place it on a grounded antistatic pad or in the
bag that came with the component.
•
Before you install or remove any component, ensure that the ATX power supply is
switched off or the power cord is detached from the power supply. Failure to do so may
cause severe damage to the motherboard, peripherals, or components.
1-4
ASUS M3N78-CM
Onboard LED
The motherboard comes with a
standby power LED that lights up
to indicate that the system is ON,
in sleep mode, or in soft-off mode.
This is a reminder that you should
shut down the system and unplug
the power cable before removing
or plugging in any motherboard
component. The illustration below
shows the location of the onboard
LED.
SB_PWR
R
M3N78-CM
ON
OFF
Standby
Power
Powered
Off
M3N78-CM Onboard LED
1.5
Motherboard overview
1.5.1
Placement direction
When installing the motherboard, ensure that you place it into the chassis in the correct
orientation. The edge with external ports goes to the rear part of the chassis as indicated in
the image below.
1.5.2
Screw holes
Place eight (8) screws into the holes indicated by circles to secure the motherboard to the
chassis.
Do not overtighten the screws! Doing so can damage the motherboard.
Place this side towards
the rear of the chassis.
M3N78-CM
Chapter 1: Product introduction
1-5
1.5.3
Motherboard layout
1
2
3
4
1
5
6
16
15
14
13
12
11
10
9
8
7
Refer to 1.10 Connectors for more information about rear panel connectors and internal
connectors.
1-6
ASUS M3N78-CM
1.5.4
Layout contents
Connectors/Jumpers/Slots
Page
1-23
1-7
1.
2.
ATX power connectors (24-pin EATXPWR, 8-pin ATX12V)
AMD CPU 940-pin Socket
3.
CPU fan connector (4-pin CPU_FAN)
DDR2 DIMM slots
1-8
4.
1-10
1-21
1-20
1-22
1-19
1-16
1-5
5.
Serial ATA connectors (7-pin SATA1-6)
IDE connector (40-1 pin PRI_EIDE)
USB connectors (10-1 pin USB78, USB910, USB1112)
LPT connector
6.
7.
8.
9.
Clear RTC RAM (3-pin CLRTC)
10.
11.
12.
13.
14.
15.
16.
Onboard LED
System panel connector (20-8 pin PANEL)
Floppy disk drive connector (34-1 pin FLOPPY)
Front panel audio connector (10-1 pin AAFP)
Optical drive audio connector (4-pin CD)
Digital audio connector (4-1 pin SPDIF_OUT)
Chassis and power fan connectors (3-pin CHA_FAN, 3-pin PWR_FAN)
1-25
1-18
1-22
1-20
1-19
1-24
1.6
Central Processing Unit (CPU)
The motherboard comes with an AM2+ / AM2 socket designed for AMD® AM2+ / AM2
Phenom™ FX / Phenom / Athlon™ / Sempron™ processor.
The AM2/AM2+ socket has a different pinout from the 940-pin socket designed for the
AMD Opteron™ processor. Ensure that you use a CPU that is designed for the AM2/AM2+
socket. The CPU fits in only one correct orientation. DO NOT force the CPU into the socket
to prevent bending the connectors on the socket and damaging the CPU!
1.6.1
Installing the CPU
To install a CPU:
1. Locate the CPU socket on the motherboard.
R
M3N78-CM
M3N78-CM CPU Socket AM2+
Chapter 1: Product introduction
1-7
2.
Unlock the socket by pressing the lever sideways, then lift it
up to a 90°-100° angle.
Socket lever
Ensure that the socket lever is lifted up to 90°-100° angle, otherwise the CPU will not fit in
completely.
3.
Position the CPU above the socket such that the CPU
corner with the gold triangle matches the socket corner
with a small triangle.
4.
Carefully insert the CPU into the socket until it fits in place.
The CPU fits only in one correct
orientation. DO NOT force the CPU into
the socket to prevent bending the pins
and damaging the CPU!
Small triangle
Gold triangle
5.
6.
When the CPU is in place, push down the socket
lever to secure the CPU. The lever clicks on the side
tab to indicate that it is locked.
Install a CPU heatsink and fan following the
instructions that came with the heatsink package.
You can also refer to section 1.6.2 Installing
heatsink and fan for instructions.
7.
Connect the CPU fan cable to the CPU_FAN connector on the motherboard.
CPU_FAN
Do not forget to connect the CPU
fan connector! Hardware monitoring
errors can occur if you fail to plug
this connector.
R
M3N78-CM
M3N78-CM CPU Fan Connector
1-8
ASUS M3N78-CM
1.6.2
Installing the heatsink and fan
Make sure that you use only AMD-certified heatsink and fan assembly.
Follow these steps to install the CPU heatsink and fan.
1.
Place the heatsink on top of the installed CPU, making sure that the heatsink fits
properly on the retention module base.
•
•
The retention module base is already installed on the motherboard upon purchase.
You do not have to remove the retention module base when installing the CPU or
installing other motherboard components.
•
If you purchased a separate CPU heatsink and fan assembly, make sure that a Thermal
Interface Material is properly applied to the CPU heatsink or CPU before you install the
heatsink and fan assembly.
CPU Fan
CPU Heatsink
Retention bracket
Retention Module Base
Retention bracket lock
Your boxed CPU heatsink and fan assembly should come with installation instructions for
the CPU, heatsink, and the retention mechanism. If the instructions in this section do not
match the CPU documentation, follow the latter.
2.
Attach one end of the retention bracket to the retention module base.
1
2
4
3
5
Chapter 1: Product introduction
1-9
3.
Align the other end of the retention bracket (near the retention bracket lock) to the
retention module base. A clicking sound denotes that the retention bracket is in place.
Make sure that the fan and heatsink assembly perfectly fits the retention mechanism
module base, otherwise you cannot snap the retention bracket in place.
4.
5.
Push down the retention bracket lock on the retention mechanism to secure the
heatsink and fan to the module base.
When the fan and heatsink assembly is in place, connect the CPU fan cable to the
connector on the motherboard labeled CPU_FAN.
Do not forget to connect the CPU fan connector! Hardware monitoring errors can occur if
you fail to plug this connector.
1.7
System memory
1.7.1
Overview
The motherboard comes with four Double Data Rate 2 (DDR2) Dual Inline Memory Modules
(DIMM) sockets.
A DDR2 module has the same physical dimensions as a DDR DIMM but has a 240-pin
footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are notched differently to
prevent installation on a DDR DIMM socket.
The figure illustrates the location of the DDR2 DIMM sockets:
R
M3N78-CM
M3N78-CM 240-pin DDR2 DIMM Sockets
Channel
Channel A
Channel B
Socket
DIMM_A1 and DIMM_A2
DIMM_B1 and DIMM_B2
1-10
ASUS M3N78-CM
1.7.2
Memory configurations
You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered ECC / non-ECC DDR2 DIMMs
into the DIMM sockets.
Recommended memory configurations
Mode
Sockets
DIMM_A1
DIMM_B1
DIMM_A2
DIMM_B2
–
Populated
–
–
–
Single-Channel
Populated
Populated
Populated
–
–
–
–
Dual-channel (1)
Dual-channel (2)
Populated
Populated
Populated
Populated
•
You may install varying memory sizes in Channel A and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel configuration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
•
Always install DIMMs with the same CAS latency. For optimum compatibility, we
recommend that you obtain memory modules from the same vendor.
•
Due to the memory address limitation on 32-bit Windows OS, when you install 4GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you install a 64-bit
Windows OS when having 4GB or more memory installed on the motherboard.
The motherboard can support 8 GB physical memory on the operating system listed below.
You may install a maximum of 2 GB DIMMs on each slot.
64-bit
Windows® XP Professional x64 Edition
Windows® Vista x64 Edition
Qualified Vendors Lists (QVL)
DDR2-533 MHz capability
Size
Vendor
Model
CL
Brand
SS/
DS
Component
DIMM support
A*
B*
C*
512MB
512MB
1G
Kingston
Samsung
HY
KVR533D2N4/512
N/A
4
Infineon
Samsung
Hynix
SS
SS
DS
DS
DS
SS
SS
SS
HYB18T512800AF3733336550
K4T51083QB-GCD5
HY5PS12821CFP-C4
D9BOM
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
M378T6553BG0-CD5
HYMP512U64CP8-C4 AB
MT 16HTF6464AG-53EB2
VS1GB533D2
4
512MB
1G
Micron
Corsair
Elpida
4
Micron
Corsair
Elpida
N/A
N/A
N/A
N/A
64M8CFEGQIB0900718
E5108AB-5C-E
512MB
512MB
512MB
EBE51UD8ABFA-5C-E
512MB ECC
Transcend
ADATA
Micron
ADATA
6ND22D9GCT(ECC)
AD29608A8A-37DG20719
M2OAD2G3H3166I1B52
Chapter 1: Product introduction
1-11
DDR2-667 MHz capability
Size
Vendor
Model
CL
Brand
SS/
DS
Component
DIMM support
A*
B*
·
C*
·
2G
Kingston
Samsung
Qimonda
Corsair
HY
KVR667D2N5/2G
N/A
N/A
5
Micron
Samsung
Qimonda
Corsair
Hynix
DS
SS
DS
DS
DS
DS
SS
SS
DS
SS
SS
SS
DS
DS
SS
SS
DS
7RE22 D9HNL
512MB
2G
M378T6553CZ3-CE6
HYS64T256020EU-3S-B
VS1GB667D2
K4T51083QC-ZCE6
·
·
HTB18T1G800BF-3S3VV10907
MID095D62864M8CEC
HY5PS12821AFP-Y5(ECC)
HY5PS12521CFP-Y5
·
·
1G
N/A
N/A
5
·
·
1G
HYMP512U72AP8-Y5
HYMP512U64CP8-Y5 AB
KLCC28F-A8KB5
·
·
1G
HY
Hynix
·
·
512MB
512MB
1G
Kingmax
Apacer
Apacer
ADATA
ADATA
VDATA
VDATA
PSC
N/A
5
Kingmax
Apacer
Apacer
ADATA
ADATA
VDATA
VDATA
PSC
KKEA88B4LAUG-29DX
AM4B5708MIJS7E0627B
AM4B5708MIJS7E0627B
AD29608A8A-3EG20648
AD29608A8A-3EG20718
VD29608A8A-3EC20615
VD29608A8A-3EC20620
A3R12E3GEF637BLC5N
A3R1GE3CFF734MAA0J
NT5TU64M8AE-3C
·
·
AU512E667C5KBGC
AU01GE667C5KBGC
M20AD5G3H3166I1C52
M20AD5G3H3166I1C52
M2GVD5G3H31A4I1C52
M2GVD5G3I41C4I1C52
AL7E8E63B-6E1K
·
·
5
·
·
512MB
512MB
512MB
1G
N/A
N/A
N/A
N/A
5
·
·
·
·
·
·
·
·
1G
·
·
1G
PSC
AL7E8F73C-6E1
5
PSC
·
·
512MB
1G
Nanya
Kingtiger
NT512T64U88A1BY-3C
E0736001024667
N/A
N/A
Nanya
Kingtiger
·
·
KTG667PS6408NST-C6 GDBTX
·
·
Qualified Vendors Lists (QVL)
DDR2-800 MHz capability
Size
Vendor
Model
CL
Brand
SS/
DS
Component
DIMM support
A*
B*
C*
1G
Kingston
Samsung
Samsung
Qimonda
Micron
Corsair
HY
KHX6400D2LL/1G
N/A
N/A
N/A
6
Kingston
Samsung
Samsung
Qimonda
Micron
DS
DS
DS
SS
DS
DS
DS
DS
SS
DS
SS
Heat-Sink Package
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
1G
KR M378T2953CZ3-CE7
KR M391T2953CZ3-CE7
HYS64T64000EU-2.5-B2
MT18HTF12872AY-80ED4
XMS2-6400
K4T51083QC-ZCE7
1G
K4T51083QC-ZCE7(ECC)
HYB18T512800B2F25FSS28380
6TD22D9GKX(ECC)
512MB
1G
5
1G
5
Corsair
Hynix
Heat-Sink Package
1G
HYMP512U64AP8-S6 AA
78.A1GA0.9K4
N/A
5
HY5PS12821AFP-S6
2G
Apacer
ADATA
VDATA
PSC
Apacer
ADATA
VDATA
PSC
AM4B5808CQJS8E0740E
AD29608A8A-25EG80720
VD29608A8A-25EG30647
A3R1GE3CFF734MAA0E
512MB
1G
M20AD6G3H3160I1E58
M2GVD6G3I4170I1E53
AL7E8F73C-8E1
N/A
N/A
5
1G
1-12
ASUS M3N78-CM
DDR2-1066 MHz capability
Size
Vendor
Model
CL
Brand
SS/
DS
Component
DIMM support
A*
B*
C*
512MB
512MB
1G
Kingston
Kingston
Kingston
Qimonda
Corsair
Corsair
ADATA
ADATA
OCZ
KHX8500D2/512
N/A
N/A
N/A
6
Kingston
Kingston
Kingston
Qimonda
Corsair
Corsair
ADATA
ADATA
OCZ
SS
SS
DS
DS
DS
DS
SS
DS
DS
DS
Heat-Sink Package
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
·
KHX8500D2K2/1GN
Heat-Sink Package
Heat-Sink Package
HYB18T512800CF19FFSS24313
Heat-Sink Package
Heat-Sink Package
Heat-Sink Package
Heat-Sink Package
Heat-Sink Package
7KD22D9GMH
KHX8500D2K2/2GN
·
·
1G
HYS64T128020EU-19F-C
CM2X1024-8500C5
1G
N/A
5
1G
CM2X1024-8500C5D
M2OMIDG3H3160INC5Z
M2OMIDG314720INC5Z
OCZ2N10662GK
·
·
512MB
1G
5
5
·
1G
N/A
5
·
1G
GEIL
M016E2864T2AGXAKT7G330520
Micron
·
·
·
SS - Single-sided / DS - Double - sided
DIMM support:
•
•
•
A*: Supports one module inserted into any slot as Single-channel memory
configuration.
B*: Supports one pair of modules inserted into either the yellow slots or the
black slots as one pair of Dual-channel memory configuration.
C*: Supports four modules inserted into both the yellow slots and the black
slots as two pairs of Dual-channel memory configuration.
Visit the ASUS website for the latest DDR2-533/667/800/1066MHz QVL.
Chapter 1: Product introduction
1-13
1.7.3
Installing a DIMM
Unplug the power supply before adding or removing DIMMs or other system components.
Failure to do so can cause severe damage to both the motherboard and the components.
2
1.
2.
Unlock a DDR2 DIMM socket by
pressing the retaining clips outward.
DDR2 DIMM notch
Align a DIMM on the socket such that
the notch on the DIMM matches the
break on the socket.
1
1
Unlocked retaining clip
A DDR2 DIMM is keyed with a notch so that it fits in only one direction. DO NOT force a
DIMM into a socket to avoid damaging the DIMM.
3.
Firmly insert the DIMM into the socket
until the retaining clips snap back in place
and the DIMM is properly seated.
3
Locked Retaining Clip
1.7.4
Removing a DIMM
To remove a DIMM:
1.
Simultaneously press the retaining clips
outward to unlock the DIMM.
2
Support the DIMM lightly with your
fingers when pressing the retaining
clips. The DIMM might get damaged
when it flips out with extra force.
1
1
DDR2 DIMM notch
2.
Remove the DIMM from the socket.
1-14
ASUS M3N78-CM
1.8
Expansion slots
In the future, you may need to install expansion cards. The following sub-sections describe
the slots and the expansion cards that they support.
Ensure to unplug the power cord before adding or removing expansion cards. Failure to do
so may cause you physical injury and damage motherboard components.
1.8.1
Installing an expansion card
To install an expansion card:
1.
Before installing the expansion card, read the documentation that came with it and
make the necessary hardware settings for the card.
2.
Remove the system unit cover (if your motherboard is already installed in a chassis).
3.
Remove the bracket opposite the slot that you intend to use. Keep the screw for later
use.
4.
Align the card connector with the slot and press firmly until the card is completely
seated on the slot.
5.
6.
Secure the card to the chassis with the screw you removed earlier.
Replace the system cover.
1.8.2
Configuring an expansion card
After installing the expansion card, configure it by adjusting the software settings.
1.
Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for
information on BIOS setup.
2.
Assign an IRQ to the card.
3.
Install the software drivers for the expansion card.
When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that
the cards do not need IRQ assignments. Otherwise, conflicts will arise between the two PCI
groups, making the system unstable and the card inoperable. Refer to the table on the next
page for details.
1.8.4
PCI slots
The PCI slots support cards such as a LAN card, SCSI card, USB card, and other cards that
comply with PCI specifications.
1.8.5
PCI Express x1 slots
This motherboard supports PCI Express x1 network cards, SCSI cards and other cards that
comply with the PCI Express specifications.
1.8.6
PCI Express x16 slot
This motherboard supports a PCI Express x16 graphics card that complies with the PCI
Express specifications.
Chapter 1: Product introduction
1-15
1.9
Jumpers
1.
Clear RTC RAM (CLRTC)
This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can
clear the CMOS memory of date, time, and system setup parameters by erasing
the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in
CMOS, which include system setup information such as system passwords.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Remove the onboard battery.
3. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3
for about 5~10 seconds, then move the cap back to pins 1-2.
4. Reinstall the battery.
5. Plug the power cord and turn ON the computer.
6. Hold down the <Del> key during the boot process and enter BIOS setup to reenter
data.
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default
position. Removing the cap will cause system boot failure!
CLRTC
R
1 2
2 3
M3N78-CM
Normal
Clear RTC
(Default)
M3N78-CM Clear RTC RAM
You do not need to clear the RTC when the system hangs due to overclocking. For system
failure due to overclocking, use the CPU Parameter Recall (C.P.R) feature. Shut down and
reboot the system so the BIOS can automatically reset parameter settings to default values.
1-16
ASUS M3N78-CM
1.10
Connectors
1.10.1
Rear panel connectors
1
2
3
4 5
6
7
8
14
13
12
11
10
9
1.
2.
PS/2 Keyboard port(purple). This port is for a PS/2 keyboard.
Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other
VGA-compatible devices.
3.
LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN)
through a network hub.
LAN port LED indications
ACT/LINK SPEED
LED LED
Activity/Link LED
Speed LED
Status
Description Status
Description
OFF
No link
OFF
10 Mbps connection
100 Mbps connection
1 Gbps connection
ORANGE
BLINKING
Linked
ORANGE
GREEN
Data activity
LAN port
4.
5.
6.
Rear Speaker Out port (black). This port connects the rear speakers in a 4-channel,
6-channel, or 8-channel audio configuration..
Center / Subwoofer port (orange). This port connects the center / subwoofer
speakers.
Line In port (light blue). This port connects the tape, CD, DVD player, or other audio
sources.
7.
Line Out port (lime). This port connects a headphone or a speaker. In 4-channel, 6-
channel, and 8-channel configuration, the function of this port becomes Front Speaker
Out.
8.
9.
Microphone port (pink). This port connects a microphone.
Side Speaker Out port (gray). This port connects the side speakers in an 8-channel
audio configuration.
Refer to the audio configuration table below for the function of the audio ports in 2, 4, 6 or
8-channel configuration.
Chapter 1: Product introduction
1-17
Audio 2, 4, 6, or 8-channel configuration
Port
Headset
4-channel
6-channel
8-channel
2-channel
Light Blue
Lime
Line In
Line In
Line In
Front Speaker Out
Mic In
Line In
Line Out
Front Speaker Out
Front Speaker Out
Mic In
Pink
Mic In
Mic In
Orange
Black
–
–
–
–
Center/Subwoofer
Rear Speaker Out
–
Center/Subwoofer
Rear Speaker Out
Side Speaker Out
Rear Speaker Out
–
Gray
10. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
11. USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
12. DVI port. This port is for any DVI-D compatible device. DVI-D can’t be converted to
output RGB Signal to CRT and isn’t compatible with DVI-I.
13. Serial port. This 9-pin COM1 port is for pointing devices or other serial devices.
14. USB 2.0 ports 5 and 6. These two 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
1.10.2
Internal connectors
1.
Floppy disk drive connector (34-1 pin FLOPPY)
This connector is for a Floppy Disk Drive (FDD) signal cable. Insert one end of the
cable to this connector, then connect the other end to the signal connector at the back
of the floppy disk drive.
•
•
Pin 5 on the connector is removed to prevent incorrect cable connection when using an
FDD cable with a covered Pin 5.
The Floppy Disk Drive singal cable is purchased separately.
R
FLOPPY
M3N78-CM
PIN1
NOTE: Orient the red markings on
the floppy ribbon cable to PIN 1.
M3N78-CM Floppy Disk Drive Connector
1-18
ASUS M3N78-CM
2.
LPT connector (26-1pin LPT)
The LPT (Line Printing Terminal) connector supports devices such as a printer. LPT
standardizes as IEEE 1394, which is the parallel port interface on IBM PC-compatible
computers.
LPT
R
M3N78-CM
1
M3N78-CM Parallel Port Connector
3.
Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port(s).
Connect the S/PDIF module cable to this connector, then install the module to a slot
opening at the back of the system chassis.
R
M3N78-CM
SPDIF_OUT
M3N78-CM Digital Audio Connector
The S/PDIF module is purchased separately.
Chapter 1: Product introduction
1-19
4.
IDE connector (40-1 pin PRI_IDE)
The onboard IDE connector is for Ultra DMA 133/100/66 signal cable. There are
three connectors on each Ultra DMA 133 / 100 / 66 signal cable: blue, black, and gray.
Connect the blue connector to the motherboard’s IDE connector, then select one of the
following modes to configure your device(s).
Drive jumper setting
Mode of device(s)
Cable connector
Black
Single device
Two devices
Cable-Select or Master
-
Master
Slave
Master
Slave
Black
Cable-Select
Gray
Master
Slave
Black or gray
•
•
Pin 20 on the IDE connector is removed to match the covered hole on the Ultra DMA
cable connector. This prevents incorrect insertion when you connect the IDE cable.
Use the 80-conductor IDE cable for Ultra DMA 133/100/66 IDE devices.
If any device jumper is set as “Cable-Select”, ensure that all other device jumpers have the
same setting.
R
M3N78-CM
M3N78-CM IDE Connector
5.
Optical drive audio in connector (4-pin CD)
This connector allows you to receive stereo audio input from sound sources such as a
CD-ROM, TV tuner, or MPEG card.
CD
(black)
R
M3N78-CM
M3N78-CM Internal Audio Connector
1-20
ASUS M3N78-CM
6.
Serial ATA connectors (7-pin SATA1 [red], SATA2 [red], SATA3 [red], SATA4 [red],
SATA5 [black], SATA6 [black])
These connectors are for the Serial ATA signal cables for Serial ATA 3Gb/s hard disk
and optical disk drives. The Serial ATA 3Gb/s is backward compatible with Serial ATA
1.5Gb/s specification. The data transfer rate of the Serial ATA 3Gb/s is faster than the
standard parallel ATA with 133 MB/s (Ultra DMA133).
If you install Serial ATA hard disk drives, you can create a RAID 0, RAID 1, RAID 5,
RAID 0+1, and JBOD configuration through the onboard controller.
GND
GND
RSATA_RXN6
RSATA_RXP6
GND
RSATA_RXN5
RSATA_RXP5
GND
RSATA_TXN6
RSATA_TXP6
RSATA_TXN5
RSATA_TXP5
GND
GND
GND
GND
RSATA_RXN3
RSATA_RXP3
GND
RSATA_RXN4
RSATA_RXP4
GND
RSATA_TXN3
RSATA_TXP3
RSATA_TXN4
RSATA_TXP4
GND
GND
R
M3N78-CM
GND
GND
RSATA_RXN2
RSATA_RXP2
GND
RSATA_RXN1
RSATA_RXP1
GND
RSATA_TXN2
RSATA_TXP2
RSATA_TXN1
RSATA_TXP1
GND
GND
M3N78-CM SATA Connectors
Install the Windows® XP Service Pack 1 before using Serial ATA.
•
For detailed instructions on how to configure RAID 0, RAID 1, RAID 5, and
RAID 10, and JBOD, refer to the RAID manual in the support DVD.
•
If you intend to create a Serial ATA RAID set using these connectors, set
the SATA Mode select item in the BIOS to [RAID Mode]. See the page
2-11 for details.
•
Due to the chipset’s limitation, SATA 5 and SATA 6 do not support IDE
mode, only support AHCI and RAID mode.
Chapter 1: Product introduction
1-21
7.
USB connectors (10-1 pin USB78, USB 910, USB1112)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specification that supports up to
480 Mbps connection speed.
R
USB78
USB1112
USB910
1
1
M3N78-CM
M3N78-CM USB 2.0 Connectors
1
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
The USB 2.0 module is purchased separately.
8.
Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel audio I/O module that supports
either High Definition Audio or AC`97 audio standard. Connect one end of the front
panel audio I/O module cable to this connector.
Legacy AC’97-compliant
pin definition
Azalia-compliant
pin definition
R
AAFP
M3N78-CM
M3N78-CM Azalia Analog Front Panel Connector
•
•
We recommend that you connect a high-definition front panel audio module to this
connector to avail of the motherboard high-definition audio capability.
If you want to connect a high-definition front panel audio module to this connector,
ensure that the Front Panel Select item in the BIOS is set to [HD Audio]; if you want to
connect an AC`97 front panel audio module to this connector, set the item to [AC97].
1-22
ASUS M3N78-CM
9.
ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
These connectors are for an ATX power supply. The plugs from the power supply are
designed to fit these connectors in only one orientation. Find the proper orientation and
push down firmly until the connectors completely fit.
ATX12V
EATXPWR
+12V DC
GND
+12V DC
GND
+3 Volts
Ground
+5 Volts
+5 Volts
+5 Volts
-5 Volts
Ground
Ground
Ground
PSON#
Ground
-12 Volts
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
Ground
+5 Volts
Ground
R
+5 Volts
Ground
M3N78-CM
+3 Volts
+3 Volts
M3N78-CM ATX Power Connector
•
We recommend that you use an 24-pin EATXPWR Specification 2.0-compliant power
supply unit (PSU) with a minimum of 300 W power rating. This PSU type has 24-pin and
4-pin power plugs.
•
If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the 20-pin
power plug can provide at least 15 A on +12 V and that the PSU has a minimum power
rating of 300 W. The system may become unstable or may not boot up if the power is
inadequate.
•
Do not forget to connect the 4-pin ATX +12 V power plug; otherwise, the system will not
boot up.
•
We recommend that you use a PSU with higher power output when configuring a
system with more power-consuming devices. The system may become unstable or may
not boot up if the power is inadequate.
•
If you are uncertain about the minimum power supply requirement for your system,
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
•
You must install a PSU with a higher power rating if you intend to install additional
devices.
Chapter 1: Product introduction
1-23
10. CPU, Chassis and Power Fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN, 3-pin
PWR_FAN)
The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or a total of
1A~2.22A (26.64W max.) at +12V. Connect the fan cables to the fan connectors on the
motherboard, ensuring that the black wire of each cable matches the ground pin of the
connector.
Do not forget to connect the fan cables to the fan connectors. Insufficient air flow inside the
system may damage the motherboard components. These are not jumpers! DO NOT place
jumper caps on the fan connectors.
Only CPU Fan supports Q-Fan.
CPU_FAN
CHA_FAN
R
Rotation
+12V
GND
M3N78-CM
PWR_FAN
Rotation
+12V
GND
M3N78-CM Fan Connectors
1-24
ASUS M3N78-CM
11. System panel connector (20-8 pin PANEL)
This connector supports several chassis-mounted functions.
PANEL
SPEAKER
PLED
R
M3N78-CM
Reset
PWRSW
+IDE_LED
M3N78-CM System Panel Connector
•
•
System power LED (2-pin PLED)
This 2-pin connector is for the system power LED. Connect the chassis power LED
cable to this connector. The system power LED lights up when you turn on the system
power, and blinks when the system is in sleep mode.
Hard disk drive activity LED (2-pin +IDE_LED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable
to this connector. The IDE LED lights up or flashes when data is read from or written to
the HDD.
•
•
System warning speaker (4-pin SPEAKER)
This 4-pin connector is for the chassis-mounted system warning speaker. The speaker
allows you to hear system beeps and warnings.
Power/Soft-off button (2-pin PWRSW)
This 2-pin connector is for the system power button. Pressing the power button turns
the system ON or puts the system in SLEEP or SOFT-OFF mode depending on the
BIOS settings. Pressing the power switch for more than four seconds while the system
is ON turns the system OFF.
•
Reset button (2-pin Reset)
This 2-pin connector is for the chassis-mounted reset button for system reboot without
turning off the system power.
Chapter 1: Product introduction
1-25
1.11
Software support
1.11.1
Installing an operating system
This motherboard supports Windows® XP/Vista Operating Systems (OS). Always install the
latest OS version and corresponding updates to maximize the features of your hardware.
•
•
Motherboard settings and hardware options vary. Use the setup procedures presented in
this chapter for reference only. Refer to your OS documentation for detailed information.
Ensure that you install Windows® XP Service Pack 1 or later versions before installing
the drivers for better compatibility and system stability.
1.11.2
Support DVD information
The Support DVD that came with the motherboard package contains the drivers, software
applications, and utilities that you can install to avail all motherboard features.
The contents of the Support DVD are subject to change at any time without notice. Visit the
To run the Support DVD
Place the Support DVD to the optical drive. The DVD automatically displays the Drivers menu
if Autorun is enabled in your computer.
The following screen is used for reference only.
Click an icon to
display Support DVD/
motherboard information
Click an item to install
If Autorun is NOT enabled in your computer, browse the contents of the Support DVD to
locate the file ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run
the DVD.
1-26
ASUS M3N78-CM
Chapter 2
BIOS information
2.1
Managing and updating your BIOS
The following utilities allow you to manage and update the motherboard Basic Input/Output
System (BIOS) setup.
1.
2.
ASUS Update: Updates the BIOS in Windows® environment.
ASUS EZ Flash 2: Updates the BIOS in DOS mode using a floppy disk or a USB flash
disk.
3.
4.
ASUS AFUDOS: Updates the BIOS in DOS mode using a bootable floppy disk.
ASUS CrashFree BIOS 3: Updates the BIOS using a bootable floppy disk, a USB
flash disk or the motherboard support DVD when the BIOS file fails or gets corrupted.
Refer to the corresponding sections for details on these utilities.
Save a copy of the original motherboard BIOS file to a bootable floppy disk or a USB flash
disk in case you need to restore the BIOS in the future. Copy the original motherboard
BIOS using the ASUS Update or AFUDOS utilities.
2.1.1
ASUS Update utility
The ASUS Update is a utility that allows you to manage, save, and update the motherboard
BIOS in Windows® environment. The ASUS Update utility allows you to:
•
•
•
•
•
Save the current BIOS file
Download the latest BIOS file from the Internet
Update the BIOS from an updated BIOS file
Update the BIOS directly from the Internet, and
View the BIOS version information.
This utility is available in the support DVD that comes with the motherboard package.
ASUS Update requires an Internet connection either through a network or an Internet
Service Provider (ISP).
Installing ASUS Update
To install ASUS Update:
1.
2.
3.
Place the support DVD in the optical drive. The Drivers menu appears.
Click the Utilities tab, then click Install ASUS Update.
The ASUS Update utility is copied to your system.
Quit all Windows® applications before you update the BIOS using this utility.
Chapter 2: BIOS setup
2-1
Updating the BIOS through the Internet
To update the BIOS through the Internet:
1.
Launch the ASUS Update utility from the Windows® desktop by clicking Start >
Programs > ASUS > ASUSUpdate > ASUSUpdate.
2.
3.
Select Update BIOS from the Internet from the drop-down menu, then click Next.
Select the ASUS FTP site nearest you to avoid network traffic, or click Auto Select
then click Next.
4.
5.
From the FTP site, select the BIOS version that you wish to download then click Next.
Follow the screen instructions to complete the update process.
The ASUS Update utility is capable of updating itself through the Internet. Always update
the utility to avail all its features.
Updating the BIOS through a BIOS file
To update the BIOS through a BIOS file:
1.
Launch the ASUS Update utility from the Windows® desktop by clicking Start >
Programs > ASUS > ASUSUpdate > ASUSUpdate.
2.
3.
4.
Select Update BIOS from a file from the drop-down menu, then click Next.
Locate the BIOS file from the Open window, then click Open.
Follow the screen instructions to complete the update process.
2.1.2
Creating a bootable floppy disk
1.
Do any one of the following to create a bootable floppy disk.
DOS environment
a. Insert a 1.44MB floppy disk into the drive.
b. At the DOS prompt, type format A:/S then press <Enter>.
Windows® XP environment
a. Insert a 1.44 MB floppy disk to the floppy disk drive.
b. Click Start from the Windows® desktop, then select My Computer.
c. Select the 3 1/2 Floppy Drive icon.
d. Click File from the menu, then select Format. A Format 3 1/2 Floppy
Disk window appears.
e. Select Create an MS-DOS startup disk from the format options field,
then click Start.
Windows® Vista environment
a. Insert a formatted, high density 1.44 MB floppy disk to the floppy disk
drive.
b. Click
from the Windows® desktop, then select Computer.
c. Right-click Floppy Disk Drive then click Format to display the
Format 3 1/2 Floppy dialog box.
2-2
ASUS M3N78-CM
d.
Select the Create an MS-DOS startup disk check box.
e. Click Start.
2.
Copy the original or the latest motherboard BIOS file to the bootable floppy disk.
2.1.3
ASUS EZ Flash 2 utility
The ASUS EZ Flash 2 feature allows you to update the BIOS without having to go through
the long process of booting from a floppy disk and using a DOS-based utility. The EZ Flash 2
utility is built-in the BIOS chip so it is accessible by pressing <Alt> + <F2> during the Power-
On Self Tests (POST).
To update the BIOS using EZ Flash 2:
1.
motherboard.
2.
3.
Save the BIOS file to a floppy disk or a USB flash disk, then restart the system.
You can launch the EZ Flash 2 in two ways.
(1) Insert the floppy disk / USB flash disk that contains the BIOS file to the floppy disk
drive or the USB port.
Press <Alt> + <F2> during POST to display the following.
ASUSTek EZ Flash 2 BIOS ROM Utility V3.06
FLASH TYPE: MXIC 25L8005
Current ROM
BOARD: M3N78-CM
VER: 0401
Update ROM
BOARD: Unknown
VER: Unknown
DATE: 07/02/2008
DATE: Unknown
PATH: A:\
A:
Note
[Enter] Select or Load [Tab] Switch [V] Drive Info
[Up/Down/Home/End] Move[B] Backup [ESC] Exit
(2) Enter BIOS setup program. Go to the Tools menu to select EZ Flash 2 and press
<Enter> to enable it.
You can switch between drives by pressing <Tab> before the correct file is found.
Then press <Enter>.
4.
When the correct BIOS file is found, EZ Flash 2 performs the BIOS update process
and automatically reboots the system when done.
•
This function can support devices such as USB flash disk, or floppy disk with FAT 32/16
format and single partition only.
•
Do not shut down or reset the system while updating the BIOS to prevent system boot
failure!
Chapter 2: BIOS setup
2-3
2.1.4
AFUDOS utility
The AFUDOS utility allows you to update the BIOS file in DOS environment using a bootable
floppy disk with the updated BIOS file. This utility also allows you to copy the current BIOS
file that you can use as backup when the BIOS fails or gets corrupted during the updating
process.
Copying the current BIOS
To copy the current BIOS file using the AFUDOS utility:
•
Make sure that the floppy disk is not write-protected and has at least 1024KB free space
to save the file.
•
The succeeding BIOS screens are for reference only. The actual BIOS screen displays
may not be the same as shown.
1.
Copy the AFUDOS utility (afudos.exe) from the motherboard support DVD to a
bootable floppy disk.
2.
Boot the system in DOS mode.
3.
At the prompt key in afudos /o[filename]
where the [filename] is any user-assigned filename of not more than eight
alphanumeric characters for the main filename and three alphanumeric characters for
the extension name.
A:\>afudos /oOLDBIOS1.rom
Main filename Extension name
then press <Enter> to copy the current BIOS file to the floppy disk.
4. The utility returns to the DOS prompt after copying the current BIOS file.
Updating the BIOS file
To update the BIOS file using the AFUDOS utility:
1.
motherboard. Save the BIOS file to a bootable floppy disk.
We recommend that you write the BIOS filename on a piece of paper; you will need to key
in the exact BIOS filename at the DOS prompt later.
2.
Copy the AFUDOS utility (afudos.exe) from the motherboard support DVD to a
bootable floppy disk.
3.
Boot the system in DOS mode.
2-4
ASUS M3N78-CM
4.
At the prompt key in afudos /i[filename]
where [filename] is the latest or the original BIOS file in the bootable floppy disk.
A:\>afudos /iM3N78CM.ROM
then press <Enter>.
Do not shut down or reset the system while updating the BIOS to prevent system boot
failure!
5.
The utility returns to the DOS prompt after the BIOS update process is completed.
Reboot the system from the hard disk drive.
A:\>afudos /iM3N78CM.ROM
AMI Firmware Update Utility - Version 1.19(ASUS V2.07(03.11.24BB))
Copyright (C) 2002 American Megatrends, Inc. All rights reserved.
WARNING!! Do not turn off power during flash BIOS
Reading file ....... done
Reading flash ...... done
Advance Check ......
Erasing flash ...... done
Writing flash ...... done
Verifying flash .... done
Please restart your computer
A:\>
2.1.5
ASUS CrashFree BIOS 3 utility
The ASUS CrashFree BIOS 3 is an auto recovery tool that allows you to restore the BIOS file
when it fails or gets corrupted during the updating process. You can update a corrupted BIOS
file using the motherboard support DVD, a floppy disk or a USB flash disk that contains the
updated BIOS file.
•
•
•
Prepare the motherboard support DVD, the floppy disk or the USB flash disk containing
the updated motherboard BIOS before using this utility.
For the M3N78-CM motherboard, this utility will not function when you use a PATA
optical drive.
Always connect the SATA cable to the SATA1 / SATA 2 connector; otherwise, the utility
will not function.
Recovering the BIOS from a floppy disk
To recover the BIOS from a floppy disk:
1.
Turn on the system.
2.
Insert the floppy disk with the original or updated BIOS file to the floppy disk drive.
Chapter 2: BIOS setup
2-5
3.
The utility displays the following message and automatically checks the floppy disk for
the original or updated BIOS file.
Bad BIOS checksum. Starting BIOS recovery...
Checking for floppy...
When found, the utility reads the BIOS file and starts flashing the corrupted BIOS file.
Bad BIOS checksum. Starting BIOS recovery...
Checking for floppy...
Floppy found!
Reading file “M3N78CM.ROM”. Completed.
Start flashing...
DO NOT shut down or reset the system while updating the BIOS! Doing so can cause
system boot failure!
4.
Restart the system after the utility completes the updating process.
Recovering the BIOS from the support DVD
To recover the BIOS from the support DVD:
1.
2.
3.
Turn on the system.
Insert the motherboard support DVD to the optical drive.
The utility displays the following message and automatically checks the DVD for the
BIOS file.
Bad BIOS checksum. Starting BIOS recovery...
Checking for floppy...
If no floppy disk is found, the utility automatically checks the optical drive for the
original or updated BIOS file. The utility then updates the corrupted BIOS file.
Bad BIOS checksum. Starting BIOS recovery...
Checking for floppy...
Floppy not found!
Checking for DVD-ROM...
DVD-ROM found!
Reading file “M3N78CM.ROM”. Completed.
Start flashing...
4.
Restart the system after the utility completes the updating process.
The recovered BIOS may not be the latest BIOS version for this motherboard. Visit the
Recovering the BIOS from a USB flash disk
To recover the BIOS from a USB flash disk:
1.
2.
3.
Insert a USB flash disk that contains BIOS file to the USB port.
Turn on the system.
The utility will automatically checks the devices for the BIOS file When found, the utility
reads the BIOS file and starts flashing the corrupted BIOS file.
2-6
ASUS M3N78-CM
4.
Restart the system after the utility completes the updating process.
•
•
Only the USB flash disk with FAT 32/16 format and single partition can support ASUS
CrashFree BIOS 3. The device size should be smaller than 8GB.
DO NOT shut down or reset the system while updating the BIOS! Doing so can cause
system boot failure!
2.2
BIOS setup program
This motherboard supports a programmable Serial Peripheral Interface (SPI) chip that you
can update using the provided utility described in section “2.1 Managing and updating your
BIOS.”
Use the BIOS Setup program when you are installing a motherboard, reconfiguring your
system, or prompted to “Run Setup.” This section explains how to configure your system
using this utility.
Even if you are not prompted to use the Setup program, you can change the configuration of
your computer in the future. For example, you can enable the security password feature or
change the power management settings. This requires you to reconfigure your system using
the BIOS Setup program so that the computer can recognize these changes and record them
in the CMOS RAM of the SPI chip.
The SPI chip on the motherboard stores the Setup utility. When you start up the computer,
the system provides you with the opportunity to run this program. Press <Del> during the
Power-On Self-Test (POST) to enter the Setup utility; otherwise, POST continues with its test
routines.
If you wish to enter Setup after POST, reboot the system by doing any of the following
procedures:
•
•
•
•
Restart using the OS standard shut-down procedure.
Press <Ctrl>+<Alt>+<Del> simultaneously.
Press the reset button on the system chassis.
Press the power button to turn the system off then back on.
Using the power button, reset button, or the <Ctrl>+<Alt>+<Del> keys to force reset from
a running operating system can cause damage to your data or system. We recommend to
always shut-down the system properly from the operating system.
The Setup program is designed to make it as easy to use as possible. Being a menu-driven
program, it lets you scroll through the various sub-menus and make your selections from the
available options using the navigation keys.
•
The default BIOS settings for this motherboard apply for most conditions to ensure
optimum performance. If the system becomes unstable after changing any BIOS
settings, load the default settings to ensure system compatibility and stability. Select the
Load Setups Default item under the Exit Menu. See section 2.8 Exit Menu.
•
The BIOS setup screens shown in this section are for reference purposes only, and may
not exactly match what you see on your screen.
•
motherboard.
Chapter 2: BIOS setup
2-7
2.2.1
BIOS menu screen
Menu items
Menu bar
General help
Configuration fields
BIOS SETUP UTILITY
Main
Advanced
Power
Boot
Tools
Exit
Use [ENTER], [TAB]
or [SHIFT-TAB] to
select a field.
System Time
[19:34:30]
[Wed 08/27/2008]
[1.44M, 3.5 in.]
System Date
Legacy Diskette A
Use [+] or [-] to
configure system Time.
Primary IDE Master
Primary IDE Slave
SATA1
:[Not Detected]
:[Not Detected]
:[Not Detected]
:[Not Detected]
:[Not Detected]
:[Not Detected]
SATA2
SATA3
SATA4
Select Screen
Select Item
Stroage Configuration
System Information
Change Field
+-
Tab
F1
Select Field
General Help
Save and Exit
Exit
F10
ESC
v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.
Sub-menu items
Navigation keys
2.2.2
Menu bar
The menu bar on top of the screen has the following main items:
Main
For changing the basic system configuration
Advanced
Power
For changing the advanced system settings
For changing the advanced power management (APM)
configuration
Boot
Tools
Exit
For changing the system boot configuration
For changing the system tools configuration
For selecting the exit options and loading default
settings
To select an item on the menu bar, press the right or left arrow key on the keyboard until the
desired item is highlighted.
•
•
The BIOS setup screens shown in this chapter are for reference purposes only, and may
not exactly match what you see on your screen.
2-8
ASUS M3N78-CM
2.2.3
Navigation keys
At the bottom right corner of a menu screen are the navigation keys for that particular menu.
Use the navigation keys to select items in the menu and change the settings.
Some of the navigation keys differ from one screen to another.
2.2.4
Menu items
The highlighted item on the menu bar displays the specific items for that menu. For example,
selecting Main shows the Main menu items.
The other items (Advanced, Power, Boot, Tools, and Exit) on the menu bar have their
respective menu items.
2.2.5
Sub-menu items
A solid triangle before each item on any menu screen means that the iteam has a sub-menu.
To display the sub-menu, select the item and press <Enter>.
2.2.6
Configuration fields
These fields show the values for the menu items. If an item is user-configurable, you can
change the value of the field opposite the item. You cannot select an item that is not user-
configurable.
A configurable field is enclosed in brackets, and is highlighted when selected. To change the
value of a field, select it then press <Enter> to display a list of options. Refer to “2.2.8 Pop-up
window.”
2.2.7
General help
At the top right corner of the menu screen is a brief description of the selected item.
2.2.8
Pop-up window
BIOS SETUP UTILITY
Main
Advanced
Power
Boot
Tools
Exit
Select a menu item then press
<Enter> to display a pop-up window
with the configuration options for that
item.
Use [ENTER], [TAB] or
[SHIFT-TAB] to select
a field.
Suspend Mode
[Auto]
ACPI 2.0 Support
ACPI APIC support
[Disabled]
[EnOapbtilonesd]
Disabled
Enabled
Use [+] or [-] to
configure system
Time.
APM Configuration
Hardware Monitor
Select Screen
Select Item
2.2.9
Scroll bar
+-
Change Field
Tab Select Field
F1
General Help
A scroll bar appears on the right side
of a menu screen when there are
items that do not fit on the screen.
Press the
<Up> / <Down> arrow keys or <Page
Up> /<Page Down> keys to display
the other items on the screen.
F10 Save and Exit
ESC Exit
v02.61 (C)Copyright 1985-2008,A
m
e
r
i
c
a
nMegatrends, Inc.
Pop-up window
Scroll bar
Chapter 2: BIOS setup
2-9
2.3
Main menu
When you enter the BIOS Setup program, the Main menu screen appears, giving you an
overview of the basic system information.
Refer to section “2.2.1 BIOS menu screen” for information on the menu screen items and
how to navigate through them.
BIOS SETUP UTILITY
Main
Advanced
Power
Boot
Tools
Exit
Use [ENTER], [TAB]
or [SHIFT-TAB] to
select a field.
System Time
[19:34:30]
System Date
[Wed 08/27/2008]
[1.44M, 3.5 in.]
Legacy Diskette A
Use [+] or [-] to
configure system Time.
Primary IDE Master
Primary IDE Slave
SATA1
:[Not Detected]
:[Not Detected]
:[Not Detected]
:[Not Detected]
:[Not Detected]
:[Not Detected]
SATA2
SATA3
SATA4
Stroage Configuration
System Information
Select Screen
Select Item
Change Field
+-
Tab
F1
Select Field
General Help
Save and Exit
Exit
F10
ESC
v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.
v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.
2.3.1
System Time [xx:xx:xx]
Allows you to set the system time.
2.3.2
System Date [Day xx/xx/xxxx]
Allows you to set the system date.
2.3.3
Legacy Diskette A [1.44M, 3.5 in.]
Sets the type of floppy drive installed. Configuration options: [Disabled]
[360K, 5.25 in.] [1.2M , 5.25 in.] [720K , 3.5 in.] [1.44M, 3.5 in.] [2.88M, 3.5 in.]
2.3.4
Primary IDE Master/Slave, SATA1~4
While entering Setup, the BIOS automatically detects the presence of IDE/SATA devices.
There is a separate sub-menu for each IDE/SATA device. Select a device item then press
<Enter> to display the IDE device information. The BIOS automatically detects the values
opposite the dimmed items (Device, Vendor, Size, LBA Mode, Block Mode, PIO Mode, Async
DMA, Ultra DMA, and SMART monitoring). These values are not user-configurable. These
items show N/A if no IDE/SATA device is installed in the system.
Type [Auto]
Selects the type of IDE drive. Setting to Auto allows automatic selection of the appropriate
IDE device type. Select CDROM if you are specifically configuring a CD-ROM drive. Select
ARMD (ATAPI Removable Media Device) if your device is either a ZIP, LS-120, or MO drive.
Configuration options: [Not Installed] [Auto] [CDROM] [ARMD]
This item does not appear when you select SATA1/SATA2/SATA3/SATA4 devices.
2-10
ASUS M3N78-CM
LBA/Large Mode [Auto]
Enables or disables the LBA mode. Setting to [Auto] enables the LBA mode if the device
supports this mode, and if the device was not previously formatted with LBA mode disabled.
Configuration options: [Disabled] [Auto]
Block (Multi-Sector Transfer) M [Auto]
Enables or disables data multi-sectors transfers. When set to [Auto], the data transfer from
and to the device occurs multiple sectors at a time if the device supports multi-sector transfer
feature. When set to [Disabled], the data transfer from and to the device occurs one sector
at a time. Configuration options: [Disabled] [Auto]
PIO Mode [Auto]
Selects the PIO mode. Configuration options: [Auto] [0] [1] [2] [3] [4]
DMA Mode [Auto]
Selects the DMA mode. Configuration options: [Auto]
SMART Monitoring [Auto]
Sets the Smart Monitoring, Analysis, and Reporting Technology.
Configuration options: [Auto] [Disabled] [Enabled]
32Bit Data Transfer [Enabled]
Enables or disables 32-bit data transfer. Configuration options: [Disabled] [Enabled]
2.3.5
Storage Configuration
The Storage Configuration menu allows you to configure your storage device(s). Select an
item then press <Enter> to display the sub-menu.
Onboard PCI IDE Controller [Enabled]
Allows you to enable or disable the onboard PCI IDE controller.
Configuration options: [Enabled] [Disabled]
OnChip S-ATA Controller [Enabled]
Allows you to disable or set the OnChip S-ATA devices.
Configuration options: [Enabled] [Disabled]
SATA Mode select [SATA Mode]
Allows you to select the SATA Mode. Configuration options: [SATA Mode] [RAID Mode] [AHCI
Mode]
2.3.6
System Information
This menu gives you an overview of the general system specifications. The BIOS
automatically detects the items in this menu.
AMI BIOS
Displays the auto-detected BIOS information
Processor
Displays the auto-detected CPU specification
System Memory
Displays the auto-detected system memory
Chapter 2: BIOS setup
2-11
2.4
Advanced menu
The Advanced menu items allow you to change the settings for the CPU and other system
devices.
Take caution when changing the settings of the Advanced menu items. Incorrect field
values can cause the system to malfunction.
BIOS SETUP UTILITY
Main
Advanced
Power
Boot
Tools
Exit
JumperFree Configuration
CPU Configuration
Chipset
Adjust System
Frequency/Voltage
etc.
Onboard Devices Configuration
PCIPnP
USB Configuration
Select Screen
Select Item
Change Field
+-
Tab Select Field
F1
General Help
F10 Save and Exit
ESC Exit
v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.
2.4.1
JumperFree Configuration
CPU Overclocking [Auto]
Allows selection of CPU overclocking options to achieve desired CPU internal frequency.
Select either one of the preset overclocking.
Manual - Allows you to individually set overclocking parameters.
Auto - Loads the optimal settings for the system.
Overclock Profile - Loads overclocking profiles with optimal parameters for stability when
overclocking.
The following item appears only when the CPU Overclocking item is set to [Manual].
CPU Frequency, MHz [200]
Allows you to enter an integer value to over clock for CPU.
Configuration options: [Min.=200] [Max.=400]
The following item appears only when the CPU Overclocking item is set to [Overclock
Profile].
Overcloking Options [Auto]
Allows you to set the overclocking options.Configuration options: [Auto] [Overclock 3%]
[Overclock 5%] [Overclock 7%] [Test Mode]
2-12
ASUS M3N78-CM
GPU OverClocking [Auto]
Allows selection of GPU overclocking options to achieve desired GPU frequency. Select
either one of the preset overclocking configuration options:
[Auto] - allows you to set overclocking parameters automatically.
[Manual] - allows you to individually set overclocking parameters.
The following two items appear only when the GPU Overclocking item is set to [Manual].
GPU Frequency [500]
Allows you to enter an integer value from 500MHz to 999MHz to over clock for GPU.
Configuration options: [Min.=500] [Max.=999]
Shader Frequency [1200]
Allows you to enter an integer value from 1000MHz to 2000MHz to over clock for
shader. Configuration options: [Min.=1000] [Max.=2000]
PCIE Overclocking [Auto]
Allows selection of PCIE overclocking options to achieve desired PCIE frequency. Select
either one of the preset overclocking configuration options:
[Auto] - allows you to set overclocking parameters automatically.
[Manual] - allows you to individually set overclocking parameters.
The following item appears only when the PCIE Overclocking item is set to [Manual].
CPU Ratio and Voltage:
Processor Frequency Multiplier [Auto]
Allows you to select the processor frequency multiplier. Configuration options: [Auto]
[x4.0 800MHz] [x5.0 1000MHz] [x6.0 1200MHz] [x7.0 1400MHz] [x8.0 1600MHz] [x9.0
1800MHz]
Processor Voltage [Auto]
Allows you to select the processor voltage. Configuration options: [Auto] [+ 50mv] [+ 100mv]
[+ 150mv]
Processor-NB Voltage [Auto]
Allows you to select the processor-NB voltage. Configuration options: [Auto] [+ 50mv] [+
100mv] [+ 150mv]
Hyper Transport Configuration:
Hyper Transport Speed [Auto]
Allows you to select the Hyper Transport speed. Configuration options: [200 MHz] [400 MHz]
[600 MHz] [800 MHz] [1 GHz] [Auto]
Hyper Transport Width [16 16 ]
Allows you to select the Hyper Transport width. Configuration options: [8 8 ] [16 16 ]
Chapter 2: BIOS setup
2-13
Memory Timing and Voltage:
Memory Clock Mode [Auto]
Allows you to select the Memory Clock mode. Configuration options: [Auto] [Manual]
The following item appears only when the Memory Clock Mode item is set to [Manual].
Memclock Value [266 MHz]
Allows you to select the memclock value. Configuration options: [266 MHz] [333MHz]
[400 MHz] [533 MHz]
DRAM Timing Mode [Auto]
Allows you to set the DRAM timing mode. Configuration options: [Auto] [DCT 0]
The following items appear only when the DRAM Timing Mode item is set to [DCT 0].
CAS# Latency [ Auto]
Allows you to set CAS# latency. Configuration options: [Auto] [3 CLK] [4 CLK] [5 CLK]
[6 CLK] [7 CLK DH_Only]
TRCD [ Auto]
Allows you to set TRCD. Configuration options: [3 CLK] [4 CLK] [5 CLK] [6 CLK] [Auto]
TRP [ Auto]
Allows you to set TRP. Configuration options: [3 CLK] [4 CLK] [5 CLK] [6 CLK] [Auto]
tRTP [ Auto]
Allows you to specify the read CAS# to percharge time.
Configuration options: [Auto] [2-4 CLK] [3-5 CLK]
TRAS [ Auto]
Allows you to set TRAS. Configuration options: [5 CLK] [6 CLK] [7 CLK] [8 CLK] [9
CLK] [10 CLK] [11 CLK] [12 CLK] [13 CLK] [14 CLK] [15 CLK] [16 CLK] [17 CLK] [18
CLK] [Auto]
TRC [ Auto]
Allows you to set TRC. Configuration options: [11 CLK] [12 CLK] [13 CLK] [14 CLK] [15
CLK] [16 CLK] [17 CLK] [18 CLK] [19 CLK] [20 CLK] [21 CLK] [22CLK] [23 CLK] [24
CLK] [25 CLK] [26 CLK] [Auto]
tWR [ Auto]
Allows you to specify when the last write is registered by the DRAM.
Configuration options: [Auto] [3 CLK] [4 CLK] [5 CLK] [6 CLK]
TRRD [ Auto]
Allows you to set TRRD. Configuration options: [2 CLK] [3 CLK] [4 CLK] [5 CLK] [Auto]
tRWTTO [ Auto]
Allows you to set tRWTTO. Configuration options: [Auto] [2 CLK] [3 CLK] [4 CLK] [5
CLK] [6 CLK] [7 CLK] [8 CLK] [9 CLK]
tWRRD [ Auto]
Allows you to specify the write to read delay when accessing different DRAMs.
Configuration options: [Auto] [0 CLK] [1 CLK] [2 CLK] [3 CLK]
tWTR [ Auto]
Allows you to specify the write to read delay when accessing the same DRAM.
Configuration options: [1 CLK] [2 CLK] [3 CLK] [Auto]
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ASUS M3N78-CM
tWRWR [ Auto]
Allows you to specify the Twrwr time. Configuration options: [Auto] [0 CLK] [1 CLK] [2
CLK] [3 CLK]
tRDRD [ Auto]
Allows you to specify the Trdrd time. Configuration options: [Auto] [2 CLK] [3 CLK] [4
CLK] [5 CLK]
tRFC0/1/2/3[ Auto]
Allows you to specify the Trfc0/1/2/3 time. Configuration options: [Auto] [75ns] [105ns]
[127.5ns] [195ns] [327.5ns]
Memory Over Voltage [Auto]
Allows you to set the Memory Over Voltage. Use +/- to adjust the voltage. The increment is
0.00625V. The standard value is 1.85000V. Configuration options: [Auto] [Min = 1.850000V]
[Max = 2.24375V]
Chipset Voltage:
Chipset Voltage [Auto]
Allows you to set the Chipset Voltage.
Configuration options: [Auto][+ 50mv] [+ 100mv] [+ 150mv]
2.4.2
CPU Configuration
GART Error Reporting [Disabled]
This option should remain disabled for the normal operation. The driver developer may
enable it for testing purpose. Configuration options: [Disabled] [Enabled]
Microcode Updation [Enabled]
Allows you to enable or disable the microcode updation.
Configuration options: [Disabled] [Enabled]
Secure Virtual Machine Mode [Enabled]
Allows you to enable or disable the AMD Secure Virtual Machine mode.
Configuration options: [Disabled] [Enabled]
Cool ‘n’ Quiet [Enabled]
Allows you to enable or disable the generation of ACPI_PPC, _PSS, and _PCT objects.
Configuration options: [Disabled] [Enabled]
2.4.3
Chipset
The Chipset menu allows you to change the advanced chipset settings. Select an item then
press <Enter> to display the sub-menu.
NorthBridge Configuration
Memory Configuration
Bank Interleaving [Auto]
Allows you to enable the bank memory interleaving.
Configuration options: [Disabled] [Auto]
Channel Interleaving [Disabled]
Allows you to enable the channel memory interleaving.
Configuration options: [Disabled] [Address bits 6] [Address bits 12] [XOR of Address
bits [20:16,6] ] [XOR of Address bits [20:16,9] ]
Chapter 2: BIOS setup
2-15
Enable Clock to All DIMMs [Disabled]
Enables or disables clock to all DIMMs. Configuration options: [Disabled] [Enabled]
MemClk Tristate C3/ALTVID [Disabled]
Enables or disables the MemClk Tristate C3/ALTVID.
Configuration options: [Disabled] [Enabled]
Memory Hole Remapping [Enabled]
Enables or disables the memory remapping around memory hole. Configuration
options: [Disabled] [Enabled]
DCT Unganged Mode [Auto]
Allow you to enable or disable Unganed mode.
Configuration options: [Auto] [Always]
Power Down Enable [Enabled]
Enables or disables the DDR power down mode.
Configuration options: [Disabled] [Enabled]
ECC Configuration
ECC Mode [Disabled]
Enables or disables the DRAM ECC that allows the hardware to report and correct
memory errors automatically. Configuration options: [Disabled] [Basic] [Good] [Super]
[Max] [User]
DRAM ECC Enable [Disabled]
Enables or disables the DRAM ECC. Configuration options: [Disabled] [Enabled]
DRAM SCRUB REDIRECT [Disabled]
Enables or disables the DRAM SCRUB REDIRECT feature that allows the system to
correct the DRAM ECC errors immediately when they occur. Configuration options:
[Disabled] [Enabled]
4-Bit ECC Mode [Disabled]
Enables or disables the ECC chip kill feature.
Configuration options: [Disabled] [Enabled]
DRAM BG Scrub [Disabled]
Disables or sets the DRAM BG Scrub. Configuration options: [Disabled] [40ns] [80ns]
[160ns] [320ns] [640ns] [1.28us] [2.56us] [5.12us] [10.2us] [20.5us] [41.0us] [81.9us]
[163.8us] [327.7us] [655.4us]
Data/L2/L3 Cache BG Scrub [Disabled]
Disables or sets the Data/L2/L3 Cache BG Scrub. This item allows the cache RAM
to be corrected when idle. Configuration options: [Disabled] [40ns] [80ns] [160na]
[320ns] [640ns] [1.28us] [2.56us] [5.12us] [10.2us] [20.5us] [41.0us] [81.9us] [163.8us]
[327.7us] [655.4us]
SouthBridge Configuration
Primary Graphics Adapter [PCIE VGA Card First]
Display Device Priority, from high to low. Configuration options: [PCIE VGA Card First]
[Internal VGA First] [PCIE VGA Card First]
Hybrid SLI Mode [mGPU Auto]
Allows you to set the Hybrid SLI mode.
Configuration options: [mGPU Auto] [mGPU always enable]
2-16
ASUS M3N78-CM
iGPU Frame Buffer Size [128 MB]
Allows you to set the iGPU Frame Buffer Size.
Configuration options: [32 MB] [64 MB] [128 MB] [256 MB]
PCIE 2.0 Support [Auto]
Allows you to enable or disable the PCIE 2.0 support.
Configuration options: [Disabled] [Auto]
AZALIA Audio [External codec]
Allows you to set HD Audio mode. Configuration options: [Disabled] [External codec]
Front Panel Select [HD Audio]
Allows you to set HD Audio mode. Configuration options: [AC97] [HD Audio]
Onboard LAN [Enabled]
Allows you to set or disable the Onboard LAN. Configuration options: [Enabled] [Disabled]
OnBoard LAN Boot ROM [Disabled]
Allows you to enable or disable the OnBoard LAN Boot ROM.
Configuration options: [Enabled] [Disabled]
SouthBridge ACPI HPET TABLE [Enabled]
Allows you to enable or disable SouthBridge ACPI HPET TABLE.
Configuration options: [Disabled] [Enabled]
2.4.4
Onboard Devices Configuration
Serial Port1 Address [3F8/IRQ4]
Allows you to select the Serial Port1 base address.
Configuration options: [Disabled] [3F8/IRQ4][2F8/IRQ3] [3E8/IRQ4] [2E8/IRQ3]
Parallel Port Address [378]
Allows you to select the Parallel Port base addresses.
Configuration options: [Disabled] [378] [278] [3BC]
Parallel Port Mode [Normal]
Allows you to select the Parallel Port mode. Configuration options: [Normal] [EPP] [ECP]
[EPP+ECP]
2.4.5
PCI PnP
The PCI PnP menu items allow you to change the advanced settings for PCI/PnP devices.
The menu includes setting IRQ and DMA channel resources for either PCI/PnP or legacy ISA
devices, and setting the memory size block for legacy ISA devices.
Take caution when changing the settings of the PCI PnP menu items. Incorrect field values
can cause the system to malfunction.
Plug and Play O/S [No]
When set to [No], BIOS configures all the devices in the system. When set to [Yes] and if you
install a Plug and Play operating system, the operating system configures the Plug and Play
devices not required for boot.
Configuration options: [No] [Yes]
Chapter 2: BIOS setup
2-17
PCI Latency Timer [64]
Allows you to select the value in units of PCI clocks for the PCI device latency timer register.
Configuration options: [32] [64] [96] [128] [160] [192] [224] [248]
Allocate IRQ to PCI VGA [Yes]
When set to [Yes], BIOS assigns an IRQ to PCI VGA card if the card requests for an IRQ.
When set to [No], BIOS does not assign an IRQ to the PCI VGA card even if requested.
Configuration options: [Yes] [No]
Palette Snooping [Disabled]
When set to [Enabled], the palette snooping feature informs the PCI devices that an
ISA graphics device is installed in the system so that the latter can function correctly.
Configuration options: [Disabled] [Enabled]
IRQ-xx assigned to [PCI Device]
When set to [PCI Device], the specific IRQ is free for use of PCI/PnP devices. When set to
[Reserved], the IRQ is reserved for legacy ISA devices.
Configuration options: [PCI Device] [Reserved]
2.4.6
USB Configuration
The items in this menu allows you to change the USB-related features. Select an item then
press <Enter> to display the configuration options.
The Module Version and USB Devices Enabled items show the
auto-detected values. If no USB device is detected, the item shows None.
USB Functions [Enabled]
Enables or disables the USB functions. Configuration options: [Enabled] [Disabled]
USB 2.0 Controller [Enabled]
Enables or disables the USB 2.0 Controller. Configuration options: [Enabled] [Disabled]
Legacy USB Support [Auto]
Allows you to enable or disable support for Legacy USB storage devices, including USB flash
drives and USB hard drives. Setting to Auto allows the system to detect the presence of USB
devices at startup. If detected, the USB controller legacy mode is enabled. If no USB device
is detected, the legacy USB support is disabled. Configuration options: [Disabled] [Enabled]
[Auto]
USB 2.0 Controller Mode [HiSpeed]
Allows you to configure the USB 2.0 controller in HiSpeed (480 Mbps) or Full Speed (12
Mbps). Configuration options: [Full Speed] [HiSpeed]
2-18
ASUS M3N78-CM
2.5
Power menu
The Power menu items allow you to change the settings for the Advanced Configuration and
Power Interface (ACPI) and the Advanced Power Management (APM). Select an item then
press <Enter> to display the configuration options.
Suspend Mode
ACPI 2.0 Support
ACPI APIC Support
[Auto]
[Disabled]
[Enabled]
Select the ACPI state
used for System
Suspend.
APM Configuration
Hardware Monitor
2.5.1
Suspend Mode [Auto]
Allows you to select the Advanced Configuration and Power Interface (ACPI) state to be used
for system suspend. Configuration options: [S1 (POS) Only] [S3 Only] [Auto]
[S1(POS) Only] - Enables the system to enter the ACPI S1 (Power on Suspend) sleep state.
In S1 sleep state, the system appears suspended and stays in a low power
mode. The system can be resumed at any time.
[S3 Only] - Enables the system to enter the ACPI S3 (Suspend to RAM) sleep state (default).
In S3 sleep state, the system appears to be off and consumes less power than in
the S1 state. When signaled by a wake-up device or event, the system resumes
to its working state exactly where it was left off.
[Auto] - Detected by OS.
2.5.2
ACPI 2.0 Support [Disabled]
Allows you to add additional tables as per Advanced Configuration and Power Interface
(ACPI) 2.0 specifications. Configuration options: [Disabled] [Enabled]
2.5.3
ACPI APIC Support [Enabled]
Allows you to enable or disable the Advanced Configuration and Power Interface (ACPI)
support in the Application-Specific Integrated Circuit (ASIC). When set to Enabled, the ACPI
APIC table pointer is included in the RSDT pointer list. Configuration options: [Disabled]
[Enabled]
2.5.4
APM Configuration
Restore on AC Power Loss [Power Off]
When set to Power Off, the system goes into off state after an AC power loss. When set to
Power On, the system goes on after an AC power loss.
Configuration options: [Power On] [Power Off]
Power On By PCI Device [Disabled]
When set to [Enabled], this parameter allows you to turn on the system through a PCI/PCIE/
Onboard LAN or modem card. This feature requires an ATX power supply that provides at
least 1A on the +5VSB lead. Configuration options: [Disabled] [Enabled]
Chapter 2: BIOS setup
2-19
Power On By Ring [Disabled]
Enable or disable RI to generate a wake event. Configuration options: [Disabled] [Enabled]
Power On By PS/2 KB/MS [Disabled]
Enable or disable PS/2 Keyboard/Mouse to generate a wake event.
Configuration options: [Disabled] [Enabled]
Power On By RTC Alarm [Disabled]
Allows you to enable or disable RTC to generate a wake event. When this item is set to
Enabled, the items RTC Alarm Date, RTC Alarm Hour, RTC Alarm Minute, and RTC Alarm
Second appear with set values. Configuration options: [Disabled] [Enabled]
2.5.5
Hardware Monitor
CPU Temperature [xxxºC/xxxºF]
MB Temperature [xxxºC/xxxºF]
The onboard hardware monitor automatically detects and displays the motherboard and CPU
temperatures. Select Ignored if you do not wish to display the detected temperatures.
CPU Fan Speed [xxxxRPM] or [Ignored]
The onboard hardware monitor automatically detects and displays the CPU, chassis,
and power fan speed in rotations per minute (RPM). If the fan is not connected to the
motherboard, the field shows N/A. Select Ignored if you do not wish to display the detected
speed.
Chassis/Power Fan Speed [xxxxRPM] or [N/A] or [Ignored]
The onboard hardware monitor automatically detects and displays the chassis/power fan speed in
rotations per minute (RPM). If the fan is not connected to the chassis, the specific field shows N/A.
Select Ignored if you do not wish to display the detected speed.
VCORE Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage
The onboard hardware monitor automatically detects the voltage output through the onboard
voltage regulators.
Smart Q-Fan Function [Disabled]
Allows you to enable or disable the ASUS Q-Fan feature that smartly adjusts the fan speeds
for more efficient system operation. Configuration options: [Disabled] [Enabled]
2-20
ASUS M3N78-CM
2.6
Boot menu
The Boot menu items allow you to change the system boot options. Select an item then
press <Enter> to display the sub-menu.
BIOS SETUP UTILITY
Main
Advanced
Power
Boot
Tools
Exit
Specifies the Boot
Device Priority
sequence.
Boot Settings
Boot Device Priority
A virtual floppy disk
drive (Floppy Drive B:)
may appear when you set
the CD-ROM drive as the
first boot device.
Boot Settings Configuration
Security
Select Screen
Select Item
Enter Go to Sub Screen
F1
F10
ESC
General Help
Save and Exit
Exit
v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.
2.6.1
Boot Device Priority
1st ~ xxth Boot Device
These items specify the boot device priority sequence from the available devices. The
number of device items that appears on the screen depends on the number of devices
installed in the system. Configuration options: [1st FLOPPY DRIVE]
[Hard Drive] [ATAPI CD-ROM ] [Disabled]
2.6.2
Boot Settings Configuration
Quick Boot [Enabled]
Enabling this item allows the BIOS to skip some power on self tests (POST) while booting to
decrease the time needed to boot the system. When set to [Disabled], BIOS performs all the
POST items. Configuration options: [Disabled] [Enabled]
Full Screen Logo [Enabled]
This allows you to enable or disable the full screen logo display feature. Configuration
options: [Disabled] [Enabled]
Set this item to [Enabled] to use the ASUS MyLogo 2™ feature.
AddOn ROM Display Mode [Force BIOS]
Sets the display mode for option ROM. Configuration options: [Force BIOS] [Keep Current]
Bootup Num-Lock [On]
Allows you to select the power-on state for the NumLock. Configuration options: [Off] [On]
PS/2 Mouse Support [Auto]
Allows you to enable or disable support for PS/2 mouse. Configuration options: [Disabled]
[Enabled] [Auto]
Chapter 2: BIOS setup
2-21
Wait for ‘F1’ If Error [Enabled]
When set to Enabled, the system waits for the F1 key to be pressed when error occurs.
Configuration options: [Disabled] [Enabled]
Hit ‘DEL’ Message Display [Enabled]
When set to Enabled, the system displays the message Press DEL to run Setup during
POST. Configuration options: [Disabled] [Enabled]
Interrupt 19 Capture [Disabled]
When set to [Enabled], this function allows the option ROMs to trap Interrupt 19.
Configuration options: [Disabled] [Enabled]
2.6.3
Security
The Security menu items allow you to change the system security settings. Select an item
then press <Enter> to display the configuration options.
Change Supervisor Password
Select this item to set or change the supervisor password. The Supervisor Password item on
top of the screen shows the default Not Installed. After you set a password, this item shows
Installed.
To set a Supervisor Password:
1.
Select the Change Supervisor Password item and press <Enter>.
2.
From the password box, type a password composed of at least six letters and/or
numbers, then press <Enter>.
3.
Confirm the password when prompted.
The message “Password Installed” appears after you successfully set your password.
To change the supervisor password, follow the same steps as in setting a supervisor
password.
To clear the supervisor password, select the Change Supervisor Password then press
<Enter>. The message “Password Uninstalled” appears.
If you forget your BIOS password, you can clear it by erasing the CMOS Real Time Clock
(RTC) RAM. See section “1.9 Jumpers” for information on how to erase the RTC RAM.
After you have set a supervisor password, the other items appear to allow you to change
other security settings.
User Access Level [Full Access]
This item allows you to select the access restriction to the Setup items. Configuration options:
[No Access] [View Only] [Limited] [Full Access]
No Access prevents user access to the Setup utility.
View Only allows access but does not allow change to any field.
Limited allows changes only to selected fields, such as Date and Time.
Full Access allows viewing and changing all the fields in the Setup utility.
2-22
ASUS M3N78-CM
Change User Password
Select this item to set or change the user password. The User Password item on top of the
screen shows the default Not Installed. After you set a password, this item shows Installed.
To set a User Password:
1.
Select the Change User Password item and press <Enter>.
2.
On the password box that appears, type a password composed of at least six letters
and/or numbers, then press <Enter>.
3. Confirm the password when prompted.
The message “Password Installed” appears after you set your password successfully.
To change the user password, follow the same steps as in setting a user password.
Clear User Password
Select this item to clear the user password.
Password Check [Setup]
When set to [Setup], BIOS checks for user password when accessing the Setup utility. When
set to [Always], BIOS checks for user password both when accessing Setup and booting the
system. Configuration options: [Setup] [Always]
2.7
Tools menu
BIOS SETUP UTILITY
Main
Advanced
Power
Boot
Tools
Exit
Press ENTER to run
the utility to select
and update BIOS.
ASUS EZ Flash 2
This utility doesn't
Express Gate
Enter OS Timer
Reset User DATA
AI NET2
[Enabled]
[10 Seconds]
[No]
support
:
1.NTFS format
Select Screen
Select Item
Change Field
+-
Enter Go to Sub
Screen
F1
General Help
F10 Save and Exit
ESC Exit
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.
2.7.1
ASUS EZ Flash 2
Allows you to run ASUS EZ Flash 2. When you press <OK>, a confirmation message
appears. Use the left/right arrow key to select between [Yes] or [No], then press <OK> to
confirm your choice.
Chapter 2: BIOS setup
2-23
2.7.2
Express Gate [Enabled]
Allows you to enable or disable the ASUS Express Gate feature. The ASUS Express Gate
feature is a unique instant-on environment that provides quick access to the Internet browser
and Skype. Configuration options: [Disabled] [Enabled]
Enter OS Timer [10 Seconds]
Allows you to set the countdown duration that the system waits at the Express Gate’s first
screen before starting Windows or other installed OS. Choose [Prompt User] to stay at the
first screen of Express Gate for user action.
Configuration options: [Prompt User] [1 Second] [3 Seconds] [5 Seconds] [10 Seconds] [15
Seconds] [20 Seconds] [30 Seconds]
Reset User Data [No]
Allows you to clear Express Gate’s user data. Configuration options: [No] [Reset]
When setting this item to [Reset], the user data is cleared the next time you enter the Express
Gate. User data includes the Express Gate’s settings as well as any personal information
stored by the web browser such as bookmarks, cookies, or browsing history. This is useful in
the rare case where corrupt settings prevent the Express Gate environment from launching
properly.
•
The first time wizard runs again when you enter the Express Gate environment after
clearing its settings.
•
When changing any of the Express Gate settings, ensure to save the settings to the
BIOS.
2.7.3
AI NET 2
Check Realtek Phy LAN cable [Disabled]
Enables or disables checking of the Realtek Phy LAN cable during the Power-On Self-Test
(POST). Configuration options: [Disabled] [Enabled]
2-24
ASUS M3N78-CM
2.8
Exit menu
The Exit menu items allow you to load the optimal or failsafe default values for the BIOS
items, and save or discard your changes to the BIOS items.
Exit Options
Exit system setup
after saving the
changes.
Exit & Save Changes
Exit & Discard Changes
Discard Changes
F10 key can be used
for this operation.
Load Setup Defaults
Pressing <Esc> does not immediately exit this menu. Select one of the options from this
menu or <F10> from the legend bar to exit.
Exit & Save Changes
Once you are finished making your selections, choose this option from the Exit menu to
ensure the values you selected are saved to the CMOS RAM. An onboard backup battery
sustains the CMOS RAM so it stays on even when the PC is turned off. When you select this
option, a confirmation window appears. Select OK to save changes and exit.
If you attempt to exit the Setup program without saving your changes, the program
prompts you with a message asking if you want to save your changes before exiting. Press
<Enter> to save the changes while exiting.
Exit & Discard Changes
Select this option only if you do not want to save the changes that you made to the
Setup program. If you made changes to fields other than System Date, System Time, and
Password, the BIOS asks for a confirmation before exiting.
Discard Changes
This option allows you to discard the selections you made and restore the previously saved
values. After selecting this option, a confirmation appears. Select OK to discard any changes
and load the previously saved values.
Load Setup Defaults
This option allows you to load the default values for each of the parameters on the Setup
menus. When you select this option or if you press <F5>, a confirmation window appears.
Select OK to load default values. Select Exit & Save Changes or make other changes
before saving the values to the non-volatile RAM.
Chapter 2: BIOS setup
2-25
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