Asus Computer Hardware P5G41T M LX PLUS User Manual

P5G41T-M LX V2  
P5G41T-M LX PLUS  
Contents  
iii  
Contents  
iv  
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.  
REACH  
Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of  
Chemicals) regulatory framework, we published the chemical substances in our products at  
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 electric shock hazard, disconnect the power cable from the electric 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 information  
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>  
viii  
P5G41T-M LX Series specifications summary  
CPU  
LGA775 socket for Intel® Core™2 Quad / Core™2 Extreme  
/ Core™2 Duo / Pentium® dual-core / Celeron® dual-core /  
Celeron® processors  
Compatible with Intel® 05B/05A/06 processors  
Supports Intel® 45nm multi-core CPU  
* Refer to www.asus.com for Intel® CPU support list.  
Chipset  
Northbridge: Intel® G41  
Southbridge: Intel® ICH7  
Front Side Bus  
Memory  
1333/1066/800 MHz  
Dual channel memory architecture  
-
2 x 240-pin DIMM sockets support unbuffered non-ECC  
1333(O.C.)/1066 MHz DDR3 memory modules  
Supports up to 8GB system memory  
-
* Refer to www.asus.com for the latest Memory QVL (Qualified  
Vendors Lists).  
** When you install a total memory of 4GB or more, Windows®  
32-bit operating system may only recognize less than 3GB.  
We recommend a maximum of 3GB system memory if you  
are using a Windows® 32-bit operating system.  
Graphics  
Integrated Intel® GMA X4500 GPU  
Supports RGB with max. resolution of 2048 x 1536 (@ 75Hz)  
Supports Microsoft® DirectX® 10  
Expansion slots  
Storage  
1 x PCI Express x16 slot  
1 x PCI Express x1 slot  
2 x PCI slots  
1 x Ultra DMA 100/66/33 connector  
4 x Serial ATA 3Gb/s ports  
LAN  
PCIe Gigabit LAN  
Audio  
Realtek® ALC887 8-channel* High Definition Audio CODEC  
* Use a chassis with HD audio module in the front panel to  
support an 8-channel audio output.  
USB  
Supports up to 8 USB 2.0/1.1 ports (4 ports at mid-board,  
4 ports at the back panel)  
ASUS unique features  
ASUS CrashFree BIOS 3  
ASUS AI NET 2  
ASUS Q-Fan  
ASUS EZ Flash 2  
ASUS MyLogo 2  
ASUS Anti-Surge Protection  
ASUS Turbo Key  
ASUS EPU-L  
(continued on the next page)  
ix  
 
P5G41T-M LX Series specifications summary  
Other features  
100% All High-quality Conductive Polymer Capacitors  
(P5G41T-M LX PLUS only)  
Back panel I/O ports  
1 x PS/2 keyboard port (purple)  
1 x PS/2 mouse port (green)  
1 x LPT port  
1 x COM port  
1 x VGA port  
1 x LAN (RJ-45) port  
4 x USB 2.0/1.1 ports  
3 x Audio jacks  
Internal connectors  
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1  
ports  
1 x IDE connector  
4 x Serial ATA connectors  
1 x Front panel audio connector  
1 x System panel connector  
1 x S/PDIF Out connector  
1 x Internal speaker connector  
1 x CPU fan connector  
1 x Chassis fan connector  
1 x 24-pin EATX power connector  
1 x 4-pin ATX 12V power connector  
BIOS  
8Mb Flash ROM, AMI BIOS, PnP, DMI 2.0, WfM 2.0, ACPI 2.0a,  
SM BIOS 2.5  
Accessories  
1 x Ultra DMA 100/66/33 cable  
2 x Serial ATA cables  
1 x I/O shield  
1 x User Manual  
Support DVD  
Drivers  
ASUS utilities  
ASUS Update  
Anti-Virus software (OEM version)  
Form factor  
MicroATX form factor: 9.6 in x 7.9 in (24.4 cm x 20.1 cm)  
* Specifications are subject to change without notice.  
x
Chapter 1  
Product introduction  
1.1  
Welcome!  
Thank you for buying an ASUS® P5G41T-M LX Series 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  
ASUS P5G41T-M LX Series motherboard  
Cables  
2 x Serial ATA cables  
1 x Ultra DMA 100/66/33 cable  
Accessories  
1 x I/O shield  
Application DVD  
Documentation  
ASUS motherboard support DVD  
User Manual  
P5G41T-M LX Series motherboards include P5G41T-M LX V2 and P5G41T-M LX PLUS  
two models. The package contents vary from models.  
If any of the items is damaged or missing, contact your retailer.  
1.3  
Special features  
1.3.1  
Product highlights  
Intel® Core™2 Extreme / Core™2 Quad / Core™2 Duo CPU  
support  
This motherboard supports Intel® LGA775 Core™ 2 Extreme / Core™  
2 Quad/ Core™ 2 Duo processors, which are excellent for multitasking,  
multimedia, and enthusiastic gamers with 1333/1066/800 MHz FSB.  
This motherboard also supports Intel® CPUs in the 45nm manufacturing  
process.  
ASUS P5G41T-M LX Series  
1-1  
 
Intel® G41 Chipset  
The Intel® G41 Express Chipset is designed to support dual-channel  
DDR3 1333 (overclocking)/1066 architecture, 1333/1066/800 Front  
Side Bus (FSB), PCIe 1.1, and mutli-core CPUs. It especially includes  
Intel® Fast memory bandwidth and reduces the latency of the memory  
accesses.  
Dual channel DDR3 1333 (O.C.)/1066 support  
This motherboard supports DDR3 memory that features data transfer  
rates of 1333 (O.C.)/1066 MHz providing great performance for 3D  
graphics and other memory-demanding applications.  
Serial ATA 3Gb/s technology  
This motherboard supports hard drives based on the Serial ATA (SATA)  
3Gb/s storage specifications, delivering enhanced scalability and  
doubling the bus bandwidth for high-speed data saving and retrieval.  
Gigabit LAN solution  
The onboard LAN controller is a highly integrated Gb LAN controller. It is  
enhanced with an ACPI management function to provide efficient power  
management for advanced operating systems.  
8-channel high definition audio  
Enjoy high-end sound quality on your PC! The onboard 8-channel High  
Definition Audio CODEC enables high-quality 192KHz/24-bit audio  
output, jack-sensing feature, and multi-streaming technology that  
simultaneously sends different audio streams to different destinations.  
You can now talk to your partners on the headphone while playing multi-  
channel network games.  
100% All High-quality Conductive Polymer Capacitors  
(P5G41T-M LX PLUS only)  
This motherboard uses all high-quality conductive polymer capacitors for  
durability, improved lifespan, and enhanced thermal capacity.  
1.3.2  
Innovative ASUS features  
ASUS EPU  
ASUS EPU is a unique power saving technology that detects the current  
system loadings and adjusts the power consumption in real time.  
Turbo Key  
ASUS Turbo Key allows you to turn the PC power button into  
an overclocking button. After you easy setup, Turbo Key boosts  
performances without interrupting ongoing work or games, simply through  
pressing the button.  
1-2  
Chapter 1: Product introduction  
 
ASUS Q-Fan  
ASUS Q-Fan technology intelligently adjusts the CPU fan speed  
according to system loading to ensure a quiet, cool, and efficient  
operation.  
ASUS Anti-Surge Protection  
This special design prevents expensive devices and the motherboard  
from damage caused by power surges from switching power supply  
(PSU).  
ASUS MyLogo2™  
This feature allows you to convert your favorite photo into a 256-color  
boot logo for a more colorful and vivid image on your screen.  
ASUS CrashFree BIOS 3  
ASUS CrashFree BIOS 3 is an auto-recovery tool that allows you to  
restore a corrupted BIOS file using the bundled support DVD or USB  
flash disk that contains the latest BIOS file.  
ASUS EZ Flash 2  
ASUS EZ Flash 2 is a utility that allows you to update the BIOS without  
using an OS-based utility.  
ASUS AI NET2  
ASUS AI NET2 remotely detects the cable connection immediately after  
turning on the system, and any faulty cable connections are reported  
back up to 100 meters at 1 meter accuracy.  
C.P.R. (CPU Parameter Recall)  
The BIOS C.P.R. feature automatically restores the CPU default settings  
when the system hangs due to overclocking failure. 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 parameters to their default settings.  
ErP ready  
The motherboard is European Union´s Energy-related Products (ErP)  
ready, and ErP requires products to meet certain energy efficiency  
requirements in regards to energy consumptions. This is in line with  
ASUS vision of creating environment-friendly and energy-efficient  
products through product design and innovation to reduce carbon  
footprint of the product and thus mitigate environmental impacts.  
ASUS P5G41T-M LX Series  
1-3  
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.  
Before handling components, use a grounded wrist strap or touch a safely grounded  
object or a metal object, such as the power supply case, 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.  
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 must 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.  
P5G41T-M LX PLUS Onboard LED  
1-4  
Chapter 1: Product introduction  
 
1.5  
Motherboard overview  
Before you install the motherboard, study the configuration of your chassis to ensure that the  
motherboard fits into it.  
Ensure that you unplug the power cord before installing or removing the motherboard.  
Failure to do so can cause you physical injury and damage motherboard components.  
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 six 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  
ASUS P5G41T-M LX Series  
1-5  
 
1.5.3  
Motherboard layout  
ASUS P5G41T-M LX Series motherboards include P5G41T-M LX V2 and P5G41T-M LX  
PLUS two models. The layout varies with models. The layout illustrations in this user guide  
are for P5G41T-M LX PLUS only.  
20.1cm(7.9in)  
RTL  
8111E  
ICS  
9LRS954A4  
9
15  
14  
13  
12  
11  
10  
1.5.4  
Layout contents  
Connectors/Jumpers/Slots/LED  
Page  
Connectors/Jumpers/Slots/LED  
Page  
1-18  
1-24  
1. Keyboard power (3-pin KBPWR)  
1-19 9.  
Clear RTC RAM (3-pin CLRTC)  
2. ATX power connectors (24-pin EATXPWR,  
4-pin ATX12V)  
1-23 10. Serial ATA connectors (7-pin SATA1-4)  
3. USB device wake-up (3-pin USBPW1-4, 3-pin  
USBPW5-8)  
1-19 11. USB connectors (10-1 pin USB56, USB78)  
1-24  
4. CPU and chassis fan connectors  
(4-pin CPU_FAN, 3-pin CHA_FAN)  
1-25 12. System panel connector (10-1 pin F_PANEL) 1-26  
5. Intel LGA775 CPU socket  
6. DDR3 DIMM slots  
1-7  
13. Speaker connector (4-pin SPEAKER)  
1-26  
1-12 14. Front panel audio connector (10-1 pin AAFP) 1-21  
7. IDE connector (40-1 pin PRI_IDE)  
8. Onboard LED (SB_PWR)  
1-22 15. Digital audio connector (4-1 pin SPDIF_OUT) 1-25  
1-4  
1-6  
Chapter 1: Product introduction  
 
1.6  
Central Processing Unit (CPU)  
The motherboard comes with a surface mount LGA775 socket designed for the Intel®  
Core™2 Extreme / Core™2 Quad / Core™2 Duo / Pentium® dual-core / Celeron® dual-core /  
Celeron® processors  
Unplug all power cables before installing the CPU.  
Connect the CPU fan cable to the CPU_FAN connector and chassis fan cable to the  
CHA_FAN connector to ensure system stability.  
Upon purchase of the motherboard, ensure that the PnP cap is on the socket and the  
socket contacts are not bent. Contact your retailer immediately if the PnP cap is missing,  
or if you see any damage to the PnP cap/socket contacts/motherboard components.  
ASUS will shoulder the cost of repair only if the damage is shipment/transit-related.  
Keep the cap after installing the motherboard. ASUS will process Return Merchandise  
Authorization (RMA) requests only if the motherboard comes with the cap on the  
LGA775 socket.  
The product warranty does not cover damage to the socket contacts resulting from  
incorrect CPU installation/removal, or misplacement/loss/incorrect removal of the PnP  
cap.  
The motherboard supports Intel® LGA775 processors with the Intel® Enhanced Intel  
SpeedStep® Technology (EIST) and Hyper-Threading Technology.  
1.6.1  
Installing the CPU  
To install a CPU:  
1. Locate the CPU socket on the motherboard.  
P5G41T-M LX PLUS CPU socket 775  
Before installing the CPU, ensure that the cam box is facing towards you and the load lever  
is on your left.  
ASUS P5G41T-M LX Series  
1-7  
 
2.  
Press the load lever with your thumb  
(A), then move it to the left (B) until it is  
released from the retention tab.  
Retention tab  
A
To prevent damage to the socket  
pins, do not remove the PnP cap  
unless you are installing a CPU.  
B
Load lever  
3.  
4.  
Lift the load lever in the direction of the  
arrow to a 135º angle.  
PnP cap  
Load plate  
4B  
Lift the load plate with your thumb and  
forefinger to a 100º angle (4A), then  
push the PnP cap from the load plate  
window to remove (4B).  
4A  
3
5.  
Position the CPU over the socket,  
ensuring that the gold triangle is on the  
bottom-left corner of the socket then fit  
the socket alignment key into the CPU  
notch.  
CPU notch  
Gold  
triangle  
mark  
Alignment key  
1-8  
Chapter 1: Product introduction  
6.  
Apply some Thermal Interface Material  
to the exposed area of the CPU that the  
heatsink will be in contact with, ensuring  
that it is spread in an even thin layer.  
Some heatsinks come with  
pre-applied thermal paste. If so, skip  
this step.  
DO NOT eat the Thermal Interface Material. If it gets into your eyes or touches your skin,  
ensure that you wash it off immediately, and seek professional medical help.  
To prevent contaminating the paste, DO NOT spread the paste with your finger directly.  
7.  
Close the load plate (A), then push  
A
the load lever (B) until it snaps into the  
retention tab.  
B
ASUS P5G41T-M LX Series  
1-9  
1.6.2  
Installing the CPU heatsink and fan  
The Intel® LGA775 processor requires a specially designed heatsink and fan assembly to  
ensure optimum thermal condition and performance.  
When you buy a boxed Intel® processor, the package includes the CPU fan and  
heatsink assembly. If you buy a CPU separately, ensure that you use only Intel®-certified  
multi-directional heatsink and fan.  
Your Intel® LGA775 heatsink and fan assembly comes in a push-pin design and requires  
no tool to install.  
If you purchased a separate CPU heatsink and fan assembly, ensure that you have  
properly applied Thermal Interface Material to the CPU heatsink or CPU before you  
install the heatsink and fan assembly.  
Ensure that you have installed the motherboard to the chassis before you install the CPU  
fan and heatsink assembly.  
To install the CPU heatsink and fan:  
A
1.  
Place the heatsink on top of the installed  
CPU, ensuring that the four fasteners match  
the holes on the motherboard.  
B
B
A
Orient the heatsink and fan assembly  
such that the CPU fan cable is closest to  
the CPU fan connector.  
2.  
Push down two fasteners at a time in a  
diagonal sequence to secure the heatsink  
and fan assembly in place.  
1
1
A
B
B
A
The type of CPU heatsink and fan assembly may differ, but the installation steps and  
functions should remain the same. The illustration above is for reference only.  
1-10  
Chapter 1: Product introduction  
 
3.  
Connect the CPU fan cable to the connector on the motherboard labeled CPU_FAN.  
P5G41T-M LX PLUS CPU fan connector  
Do not forget to connect the CPU fan connector! Hardware monitoring errors can occur if  
you fail to plug this connector.  
1.6.3  
Uninstalling the CPU heatsink and fan  
To uninstall the CPU heatsink and fan:  
1.  
2.  
3.  
Disconnect the CPU fan cable from the connector on the motherboard.  
Rotate each fastener counterclockwise.  
Pull up two fasteners at a time in a diagonal sequence to disengage the heatsink and  
fan assembly from the motherboard.  
A
A
B
B
A
B
B
A
ASUS P5G41T-M LX Series  
1-11  
 
4.  
5.  
Carefully remove the heatsink and fan  
assembly from the motherboard.  
Rotate each fastener clockwise to ensure  
correct orientation when reinstalling.  
1.7  
System memory  
1.7.1  
Overview  
The motherboard comes with two Double Data Rate 3 (DDR3) Dual Inline Memory Modules  
(DIMM) sockets. The figure illustrates the location of the DDR3 DIMM sockets:  
Channel  
Sockets  
DIMM_A1  
DIMM_B1  
Channel A  
Channel B  
P5G41T-M LX PLUS 240-pin DDR3 DIMM sockets  
1-12  
Chapter 1: Product introduction  
 
1.7.2  
Memory configurations  
You may install 512MB, 1GB, 2GB, and 4GB unbuffered non-ECC DDR3 DIMMs into the  
DIMM sockets.  
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, it is  
recommended 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 do any of the  
following:  
-
-
Use a maximum of 3GB system memory if you are using a 32-bit Windows® OS.  
Install a 64-bit Windows® OS when you want to install 4GB or more memory on  
the motherboard.  
This motherboard does not support DIMMs made up of 256 megabits (Mb) chips or less.  
The default memory operation frequency is dependent on its Serial Presence Detect  
(SPD), which is the standard way of accessing information from a memory module.  
Under the default state, some memory modules for overclocking may operate at a lower  
frequency than the vendor-marked value.  
For system stability, use a more efficient cooling system to support a full memory load (2  
DIMMs) or overclocking conditions.  
P5G41T-M LX Series Motherboard Qualified Vendors Lists (QVL)  
DDR3-1066 MHz capability  
DIMM socket  
support (Optional)  
SS/ Chip  
DS Brand  
Vendor  
Part No.  
Size  
Chip NO.  
Timing  
Voltage  
A*  
B*  
Crucial  
Crucial  
CT12864BA1067.8FF  
CT25664BA1067.16FF  
1024MB SS Micron  
2048MB DS Micron  
9GF22D9KPT  
9HF22D9KPT  
7
7
-
-
1.35V(low  
voltage)  
ELPIDA  
EBJ10UE8EDF0-AE-F  
1024MB SS ELPIDA  
J1108EDSE-DJ-F  
-
Elpida  
Elpida  
Elpida  
EBJ51UD8BAFA-AC-E  
EBJ51UD8BAFA-AE-E  
EBJ11UD8BAFA-AE-E  
512MB  
512MB  
SS Elpida  
SS Elpida  
J5308BASE-AC-E  
J5308BASE-AC-E  
J5308BASE-AC-E  
-
-
-
-
-
-
1024MB DS Elpida  
2048MB DS ELPIDA  
1.35V(low  
voltage)  
ELPIDA  
EBJ21UE8EDF0-AE-F  
J1108EDSE-DJ-F  
-
Kingston  
Kingston  
Micron  
KVR1066D3N7/1G  
KVR1066D3N7/2G  
1024MB SS Kingston  
2048MB DS Kingston  
D1288JEKAPGA7U  
D1288JEKAPGA7U  
9GF22D9KPT  
7
1.5V  
7
1.5V  
MT8JTF12864AZ-1G1F1 1024MB SS Micron  
MT16JTF25664AZ-1G1F1 2048MB DS Micron  
7
-
-
-
-
-
-
Micron  
9HF22D9KPT  
7
SAMSUNG M378B2873EH1-CF8  
SAMSUNG M378B5273BH1-CF8  
1024MB SS Samsung  
SEC 901 HCF8 K4B1G0846E  
-
4096MB DS SAMSUNG 846 K4B2G0846B-HCF8  
-
Elixir  
M2Y2G64CBHA9N-BE  
2GB DIMM PC3-8500  
2048MB DS  
-
-
7-7-7-20  
-
Kingtiger  
2048MB DS Hynix  
H5TQ1G83AFP G7C  
ASUS P5G41T-M LX Series  
1-13  
 
DDR3-1333 MHz (O.C.) capability  
DIMM socket  
support (Optional)  
SS/ Chip  
DS Brand  
Vendor  
Part No.  
Size  
Chip NO.  
Timing Voltage  
A*  
B*  
A-Data  
A-Data  
A-Data  
A-Data  
Corsair  
Corsair  
Corsair  
Corsair  
Corsair  
Corsair  
Corsair  
Corsair  
Crucial  
Crucial  
Crucial  
Crucial  
Crucial  
AD31333001GOU  
1024MB  
SS A-Data  
AD30908C8D-151C E0906  
-
-
AD31333G001GOU  
AD31333002GOU  
3072MB(Kit of 3) SS  
-
-
8-8-8-24 1.65-1.85V  
2048MB  
2048MB  
1024MB  
1024MB  
DS A-Data  
AD30908C8D-151C E0903  
-
-
AD31333G002GMU  
CM3X1024-1333C9DHX  
CM3X1024-1333C9  
TR3X3G1333C9 G  
DS  
SS  
SS  
-
-
-
-
-
-
-
8-8-8-24 1.65-1.85V  
9-9-9-24 1.60V  
-
-
-
-
3072MB(Kit of 3) SS  
3072MB(Kit of 3) SS  
3072MB(Kit of 3) SS  
-
9-9-9-24 1.50V  
9-9-9-24 1.50V  
TR3X3G1333C9 G  
-
TR3X3G1333C9  
-
9
-
1.5V  
CM3X1024-1333C9DHX  
CM3X2048-1333C9DHX  
TW3X4G1333C9 G  
CT12864BA1339.8FF  
BL12864TA1336.8SFB1  
CT25664BA1339.16FF  
1024MB  
2048MB  
DS Corsair  
-
-
-
DS  
-
-
-
-
4096MB(Kit of 2) DS  
1024MB  
2048MB(Kit of 2) SS  
2048MB DS Micron  
-
9-9-9-24 1.50V  
SS Micron  
9FF22D9KPT  
9
-
-
-
6-6-6-20 1.8V  
9KF27D9KPT  
9
-
BL25664ABA1336.16SFB1 4096MB(Kit of 2) DS  
BL25664BA1336.16SFB1 4096MB(Kit of 2) DS  
-
-
-
-
6-6-6-20 1.8V  
6-6-6-20 1.8V  
BL25664BN1337.16FF  
6144MB(Kit of 3) DS  
(XMP)  
Crucial  
ELPIDA  
ELPIDA  
-
-
7-7-7-24 1.65V  
1.35V(low  
EBJ10UE8EDF0-DJ-F  
EBJ21UE8EDF0-DJ-F  
1024MB  
2048MB  
SS ELPIDA  
DS ELPIDA  
J1108EDSE-DJ-F  
J1108EDSE-DJ-F  
-
-
voltage)  
1.35V(low  
voltage)  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SkiLL  
G.SKILL  
G.SKILL  
GEIL  
F3-10600CL8D-2GBHK  
F3-10600CL9D-2GBPK  
F3-10666CL7T-3GBPK  
F3-10666CL9T-3GBNQ  
F3-10600CL7D-2GBPI  
F3-10600CL9D-2GBNQ  
F3-10666CL8D-4GBHK  
F3-10666CL7T-6GBPK  
F3-10666CL9T-6GBNQ  
DDR3-1333 CL9-9-9-24  
GV34GB1333C7DC  
1024MB  
1024MB  
SS G.SKILL  
SS G.SKILL  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3072MB(Kit of 3) SS  
3072MB(Kit of 3) SS  
-
-
7-7-7-18 1.5~1.6V  
9-9-9-24 1.5~1.6V  
1024MB  
1024MB  
DS G.SKILL  
DS G.SKILL  
-
-
-
-
4096MB(Kit of 2) DS  
6144MB(Kit of 3) DS  
6144MB(Kit of 3) DS  
-
-
-
-
-
8-8-8-21 1.5-1.6V  
7-7-7-18 1.5~1.6V  
9-9-9-24 1.5V~1.6V  
1024MB  
2048MB  
SS  
DS  
9
-
GEIL  
7-7-7-24 1.5V  
1.3V(low  
voltage)  
GEIL  
GG34GB1333C9DC  
4096MB(Kit of 2) DS GEIL  
6144MB(Kit of 3) DS  
GL1L128M88BA12N  
9-9-9-24  
GEIL  
DDR3-1333 CL9-9-9-24  
FLFD45F-B8MF9  
-
-
9
-
1.5V  
Kingmax  
Kingmax  
Kingmax  
Kingmax  
Kingston  
Micron  
Micron  
OCZ  
1024MB  
1024MB  
2048MB  
2048MB  
2048MB  
1024MB  
SS Micron  
SS Micron  
DS Micron  
DS Micron  
DS Qimonda  
SS Micron  
DS Micron  
8HD22D9JNM  
-
FLFD45F-B8MH9 MAES  
FLFE85F-B8MF9  
9CF22D9KPT  
-
-
8HD22D9JNM  
-
-
FLFE85F-B8MH9 MEES  
KVR1333D3N9/2G  
9GF27D9KPT  
-
-
IDSH1G-03A1F1C-13H  
-
1.5V  
MT8JTF12864AZ-1G4F1  
9FF22D9KPT  
9
9
-
-
MT18JTF25664AZ-1G4F1 2048MB  
OCZ3P13332GK  
9KF27D9KPT  
2048MB(Kit of 2) SS  
-
-
-
-
-
-
-
-
-
-
-
7-7-7-20 1.8V  
OCZ  
OCZ3X1333LV3GK(XMP) 3072MB(Kit of 3) SS  
-
-
-
1.6V  
1.7V  
OCZ  
OCZ3G13334GK  
4096MB(Kit of 2) DS  
4096MB(Kit of 2) DS  
4096MB(Kit of 2) DS  
4096MB(Kit of 2) DS  
4096MB(Kit of 2) DS  
6144MB(Kit of 3) DS  
6144MB(Kit of 3) DS  
-
OCZ  
OCZ3P13334GK  
-
7-7-7-20 1.8V  
7-7-7-20 1.65V  
6-5-5-20 1.85V  
7-7-7-20 1.75V  
9-9-9-20 1.65V  
7-7-7-20 1.65V  
8-8-8-20 1.60V  
OCZ  
OCZ3P1333LV4GK  
OCZ3RPX1333EB4GK  
OCZ3X13334GK(XMP)  
OCZ3G1333LV6GK  
OCZ3P1333LV6GK  
-
OCZ  
-
OCZ  
-
OCZ  
-
OCZ  
-
OCZ  
OCZ3X1333LV6GK(XMP) 6144MB(Kit of 3) DS  
AL7F8G73D-DG1 1024MB  
-
PSC  
SS PSC  
A3P1GF3DGF928M9B05  
-
-
(continued on the next page)  
1-14  
Chapter 1: Product introduction  
DDR3-1333 MHz (O.C.) capability  
DIMM socket  
support (Optional)  
SS/ Chip  
DS Brand  
Vendor  
Part No.  
Size  
Chip NO.  
Timing Voltage  
A*  
B*  
PSC  
AL8F8G73D-DG1  
2048MB  
1024MB  
DS PSC  
A3P1GF3DGF928M9B05  
-
-
-
-
SAMSUNG M378B2873DZ1-CH9  
SAMSUNG M378B2873DZ1-CH9  
SS Samsung K4B1G0846D-HCH9  
SEC 846 HCH9  
SS SAMSUNG  
1024MB  
-
-
K4B1G08460  
SEC 913 HCH9  
SS Samsung  
SAMSUNG M378B2873EH1-CH9  
SAMSUNG M378B5673DZ1-CH9  
SAMSUNG M378B5673EH1-CH9  
Super Talent W1333X2GB8  
1024MB  
2048MB  
2048MB  
1024MB  
1024MB  
-
-
-
-
-
-
-
-
-
-
K4B1G0846E  
DS Samsung K4B1G0846D-HCH9  
SEC 913 HCH9  
DS Samsung  
K4B1G0846E  
SS  
SS  
-
-
-
SEC 813HCH9  
K4B1G0846D  
Transcend  
TS128MLK64V3U  
Transcend  
Transcend  
ASINT  
TS256MLK64V3U  
TS256MLK64V3U  
SLY3128M8-EDJ  
SLY3128M8-EDJE  
SLY3128M8-EDJ  
SLZ3128M8-EDJE  
FSX1333D3G-K2G  
FSX1333D3G-2G  
2048MB  
2048MB  
1024MB  
1024MB  
2048MB  
2048MB  
1024MB  
2048MB  
DS Micron  
DS  
9GF27D9KPT  
SEC816HCH9K4B1G0846D  
DDRII1208-DJ 0844  
J1108BASE-DJ-E  
DDRII1208-DJ 0844  
J1108BASE-DJ-E  
-
-
-
-
-
-
-
-
-
-
-
-
SS ASINT  
SS ELPIDA  
DS ASINT  
DS ELPIDA  
-
ASINT  
-
ASINT  
-
ASINT  
-
BUFFALO  
BUFFALO  
SS  
DS  
-
-
7-7-7-20  
7-7-7-20  
-
PC3-10600 DDR3-1333  
9-9-9  
Century  
1024MB  
SS Micron  
DS Micron  
8FD22D9JNM  
-
-
PC3-10600 DDR3-1333  
9-9-9  
Century  
Elixir  
2048MB  
2048MB  
2048MB  
8DD22D9JNM  
-
-
-
-
-
M2Y2G64CB8HA9N-CG  
2GB DIMM PC3-10666  
DS  
-
7-7-7-20  
-
SEC 904 HCH9  
K4B1G0846D  
Kingtiger  
DS Samsung  
Kingtiger  
PATRIOT  
PATRIOT  
PATRIOT  
PATRIOT  
KTG2G1333PG3  
PSD31G13332H  
PSD31G13332  
2048MB  
1024MB  
1024MB  
2048MB  
DS  
DS  
-
-
-
-
-
-
-
-
-
9
-
DS Patriot  
PM64M8D38U-15  
PSD32G13332H  
PDC34G1333ELK  
DS  
-
-
-
-
-
4096MB(Kit of 2) DS  
9-9-9-24 1.5V  
SILICON  
POWER  
SP001GBLTU133S01  
SP001GBLTU133S02  
SP002GBLTU133S02  
1024MB  
1024MB  
2048MB  
SS NANYA  
SS elixir  
DS elixir  
NT5CB128M8AN-CG  
N2CB1680AN-C6  
N2CB1680AN-C6  
9
9
9
-
-
-
SILICON  
POWER  
SILICON  
POWER  
TAKEMS  
TAKEMS  
TAKEMS  
TAKEMS  
TAKEMS  
TMS1GB364D081-107EY 1024MB  
TMS1GB364D081-138EY 1024MB  
TMS2GB364D081-107EY 2048MB  
TMS2GB364D081-138EY 2048MB  
TMS2GB364D082-138EW 2048MB  
SS  
SS  
DS  
DS  
DS  
-
-
-
-
-
-
-
-
-
-
7-7-7-20 1.5V  
8-8-8-24 1.5V  
7-7-7-20 1.5V  
8-8-8-24 1.5V  
8-8-8-24 1.5V  
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 both the blue slots as one pair of  
Dual-channel memory configuration.  
ASUS P5G41T-M LX Series  
1-15  
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.  
Press the retaining clips outward to  
unlock a DIMM socket.  
DIMM notch  
Align a DIMM on the socket such that  
the notch on the DIMM matches the  
DIMM slot key on the socket.  
1
1
DIMM slot key  
Unlocked retaining clip  
A DIMM is keyed with a notch so that it fits in only one direction. DO NOT force a DIMM into  
a socket in the wrong direction 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
DIMM notch  
2.  
Remove the DIMM from the socket.  
1-16  
Chapter 1: Product introduction  
 
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.  
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.  
3.  
Remove the system unit cover (if your motherboard is already installed in a chassis).  
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.  
3.  
Assign an IRQ to the card.  
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.  
1.8.3  
PCI slots  
The PCI slots support cards such as a LAN card, SCSI card, USB card, and other cards that  
comply with PCI specifications.  
1.8.4  
PCI Express x1 slot  
This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that  
comply with the PCI Express specifications.  
1.8.5  
PCI Express x16 slot  
This motherboard supports a PCI Express x16 graphics card that complies with the PCI  
Express specifications.  
ASUS P5G41T-M LX Series  
1-17  
 
1.9  
Jumpers  
1.  
Clear RTC RAM (3-pin 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.  
P5G41T-M LX PLUS Clear RTC RAM  
To erase the RTC RAM:  
1. Turn OFF the computer and unplug the power cord.  
2. 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.  
3. Plug the power cord and turn ON the computer.  
4. Hold down the <Del> key during the boot process and enter BIOS setup to re-enter  
data.  
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default  
position. Removing the cap will cause system boot failure!  
If the steps above do not help, remove the onboard battery and move the jumper again  
to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery.  
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, then the BIOS automatically resets parameter settings to  
default values.  
1-18  
Chapter 1: Product introduction  
 
2.  
Keyboard power (3-pin KBPWR)  
This jumper allows you to enable or disable the keyboard wake-up feature. When you  
set this jumper to pins 2–3 (+5VSB), you can wake up the computer by pressing a key  
on the keyboard. This feature requires an ATX power supply that can supply at least 1A  
on the +5VSB lead, and a corresponding setting in the BIOS.  
P5G41T-M LX PLUS Keyboard power setting  
3.  
USB device wake-up (3-pin USBPW1-4, 3-pin USBPW5-8)  
Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU stopped,  
DRAM refreshed, system running in low power mode) using the connected USB  
devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU,  
DRAM in slow refresh, power supply in reduced power mode).  
P5G41T-M LX PLUS USB device wake-up  
The USB device wake-up feature requires a power supply that can provide 500mA on  
the +5VSB lead for each USB port; otherwise, the system would not power up.  
The total current consumed must NOT exceed the power supply capability (+5VSB)  
whether under normal condition or in sleep mode.  
ASUS P5G41T-M LX Series  
1-19  
1.10  
Connectors  
1.10.1  
Rear panel connectors  
1.  
2.  
3.  
PS/2 mouse port (green). This port is for a PS/2 mouse.  
Parallel port. This 25-pin port connects a parallel printer, a scanner, or other devices.  
LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN)  
through a network hub. Refer to the table below for the LAN port LED indications.  
LAN port LED indications  
SPEED  
LED  
ACT/LINK  
LED  
ACT/LINK LED  
Status  
SPEED LED  
Status  
Description  
No link  
Description  
OFF  
OFF  
10 Mbps connection  
100 Mbps connection  
1 Gbps connection  
ORANGE  
BLINKING  
Linked  
ORANGE  
GREEN  
Data activity  
LAN port  
4.  
5.  
6.  
Line In port (light blue). This port connects to the tape, CD, DVD player, or other  
audio sources.  
Line Out port (lime). This port connects to a headphone or a speaker. In the 4, 6, and  
8-channel configurations, the function of this port becomes Front Speaker Out.  
Microphone port (pink). This port connects to a microphone.  
Refer to the audio configuration table below for the function of the audio ports in a 2, 4, 6,  
or 8-channel configuration.  
Audio 2, 4, 6, or 8-channel configuration  
Port  
Headset 2-channel  
4-channel  
6-channel  
8-channel  
Light Blue (Rear panel)  
Lime (Rear panel)  
Pink (Rear panel)  
Lime (Front panel)  
Line In  
Line Out  
Mic In  
Rear Speaker Out  
Rear Speaker Out  
Rear Speaker Out  
Front Speaker Out  
Bass/Center  
Front Speaker Out Front Speaker Out  
Mic In  
Bass/Center  
Side Speaker Out  
To configure an 8-channel audio output:  
Use a chassis with HD audio module in the front panel to support 8-channel audio output.  
1-20  
Chapter 1: Product introduction  
 
7.  
8.  
9.  
USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are  
available for connecting USB 2.0 devices.  
USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus (USB) ports are  
available for connecting USB 2.0 devices.  
VGA port. This 15-pin port is for a VGA monitor or other VGA-compatible devices.  
10. COM port. This port is for pointing devices or other serial devices.  
11. PS/2 Keyboard port (purple). This port is for a PS/2 keyboard.  
1.10.2  
Internal connectors  
1.  
Front panel audio connector (10-1 pin AAFP)  
This connector is for a chassis-mounted front panel audio I/O module that supports  
either HD Audio or legacy AC`97 audio standard. Connect one end of the front panel  
audio I/O module cable to this connector.  
P5G41T-M LX PLUS Front panel audio connector  
We recommend that you connect a high-definition front panel audio module to this  
connector to avail of the motherboard’s high-definition audio capability.  
If you want to connect a high-definition front panel audio module to this connector, set  
the Front Panel Type item in the BIOS setup to [HD Audio]. If you want to connect an  
AC'97 front panel audio module to this connector, set the item to [AC97]. By default, this  
connector is set to [HD Audio]. See section 2.4.3 Chipset for details.  
ASUS P5G41T-M LX Series  
1-21  
 
2.  
IDE connector (40-1 pin PRI_IDE)  
The onboard IDE connector is for the Ultra DMA 100/66/33 signal cable. There are  
three connectors on each Ultra DMA 100/66/33 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.  
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 100/66/33 IDE devices.  
P5G41T-M LX PLUS IDE connector  
If any device jumper is set as “Cable-Select,” ensure that all other device jumpers have the  
same setting.  
1-22  
Chapter 1: Product introduction  
3.  
ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)  
These connectors are for ATX power supply plugs. The power supply plugs are  
designed to fit these connectors in only one orientation. Find the proper orientation and  
push down firmly until the connectors completely fit.  
P5G41T-M LX PLUS ATX power connectors  
We recommend that you use an ATX 12V Specification 2.0-compliant power supply unit  
(PSU) with a minimum of 400W 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, ensure 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 400W. The system may become unstable or may not boot up if the power is  
inadequate.  
DO NOT forget to connect the 4-pin ATX +12V 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 or when you intend to install additional  
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.  
ASUS P5G41T-M LX Series  
1-23  
4.  
Serial ATA connectors (7-pin SATA1-4)  
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).  
P5G41T-M LX PLUS SATA connectors  
Install the Windows® XP Service Pack 2 or later version before using Serial ATA.  
5.  
USB connectors (10-1 pin USB56, USB78)  
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.  
P5G41T-M LX PLUS USB2.0 connectors  
Never connect a 1394 cable to the USB connectors. Doing so will damage the  
motherboard!  
The USB module cable is purchased separately.  
1-24  
Chapter 1: Product introduction  
6.  
CPU and chassis fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN)  
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!  
P5G41T-M LX PLUS fan connectors  
Only the 4-pin CPU fan supports the ASUS Q-FAN feature.  
7.  
Digital audio connector (4-1 pin SPDIF_OUT)  
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port. Connect  
the S/PDIF Out module cable to this connector, then install the module to a slot  
opening at the back of the system chassis.  
P5G41T-M LX PLUS Onboard LED  
The S/PDIF module is purchased separately.  
ASUS P5G41T-M LX Series  
1-25  
8.  
System panel connector (10-1 pin PANEL)  
This connector supports several chassis-mounted functions.  
P5G41T-M LX PLUS 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 +HDLED)  
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable  
to this connector. The HD LED lights up or flashes when data is read from or written to  
the HDD.  
ATX power button/soft-off button (2-pin PWRBTN)  
This connector is for the system power button.  
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.  
9.  
Speaker connector (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.  
P5G41T-M LX PLUS Speaker out connector  
1-26  
Chapter 1: Product introduction  
1.11  
Software support  
1.11.1  
Installing an operating system  
This motherboard supports Windows® XP/Vista/7 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. Refer to your OS documentation for  
detailed information.  
Ensure that you install Windows® XP Service Pack 3 or later version / Windows® Vista  
Service Pack 1 or later version before installing the drivers for better compatibility and  
system stability.  
1.11.2  
Support DVD information  
The Support DVD that comes 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 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.  
ASUS P5G41T-M LX Series  
1-27  
 
1-28  
Chapter 1: Product introduction  
Chapter 2  
BIOS information  
2.1  
Managing and updating your BIOS  
Save a copy of the original motherboard BIOS file to a USB flash disk in case you need to  
restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update  
utility.  
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.  
ASUS Update requires an Internet connection either through a network or an Internet  
Service Provider (ISP).  
This utility is available in the support DVD that comes with the motherboard package.  
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 ASUS Update.  
Follow the onscreen instructions to complete the installation.  
Quit all Windows® applications before you update the BIOS using this utility.  
Updating the BIOS  
To update the BIOS:  
1.  
From the Windows® desktop, click Start > Programs > ASUS > ASUSUpdate >  
ASUSUpdate to launch the ASUS Update utility.  
2.  
From the dropdown list, select any of the updating process:  
Updating from the Internet  
a. Select Update BIOS from the Internet, then click Next.  
b. Select the ASUS FTP site nearest you to avoid network traffic, or click Auto  
Select then click Next.  
c. From the FTP site, select the BIOS version that you wish to download then click  
Next.  
ASUS P5G41T-M LX Series  
2-1  
 
The ASUS Update utility is capable of updating itself through the Internet. Always update  
the utility to avail all its features.  
Updating from a BIOS file  
a. Select Update BIOS from a file, then click Next.  
b. Locate the BIOS file from the Open window, then click Open.  
Follow the onscreen instructions to complete the updating process.  
3.  
2.1.2  
ASUS EZ Flash 2  
The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS-based  
utility.  
Before you start using this utility, download the latest BIOS file from the ASUS website at  
To update the BIOS using EZ Flash 2:  
1.  
Insert the USB flash disk that contains the latest BIOS file to the USB port, then launch  
EZ Flash 2 in any of these two ways:  
Press <Alt> + <F2> during POST.  
Enter the BIOS setup program. Go to the Tools menu to select EZ Flash 2 and  
press <Enter> to enable it.  
Press <Tab> to switch between drives until the correct BIOS file is found.  
ASUSTek EZ Flash 2 BIOS ROM Utility V3.36  
FLASH TYPE: EON 25P/F80  
Current ROM  
Update ROM  
BOARD: Unknown  
VER: Unknown  
BOARD: P5G41T-M LX PLUS  
VER: 0301 (H:00 B:00)  
DATE: 09/17/2010  
DATE: Unknown  
PATH: A:\  
A:  
Note  
[Enter] Select or Load [Tab] Switch  
[Up/Down/Home/End] Move [B] Backup  
[V] Drive Info  
[ESC] Exit  
2.  
When the correct BIOS file is found, EZ Flash 2 performs the BIOS update process  
and automatically reboots the system when done.  
This function supports USB flash disks 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!  
2-2  
Chapter 2: BIOS information  
 
2.1.3  
ASUS CrashFree BIOS  
The ASUS CrashFree BIOS 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 restore a corrupted BIOS  
file using the motherboard support DVD or a removable device that contains the updated  
BIOS file.  
Before using this utility, rename the BIOS file in the removable device into  
P5G41TMP.ROM.  
The BIOS file in the support DVD may not be the latest version. Download the latest  
The removable devices that ASUS CrashFree BIOS support vary with motherboard  
models. For motherboards without the floppy connector, prepare a USB flash disk before  
using this utility.  
Recovering the BIOS  
To recover the BIOS:  
1.  
2.  
Turn on the system.  
Insert the support DVD to the optical drive or the removable device that contains the  
BIOS file to the USB port or to the floppy disk drive, if supported.  
3.  
The utility automatically checks the devices for the BIOS file. When found, the utility  
reads the BIOS file and starts flashing the corrupted BIOS file.  
4.  
Turn off the system after the utility completes the updating process and turn on again.  
DO NOT shut down or reset the system while updating the BIOS! Doing so can cause  
system boot failure!  
Ensure to load the BIOS default settings to ensure system compatibility and stability. Select  
the Load Setup Defaults item under the Exit menu. Refer to section 2.8 Exit menu for  
details.  
ASUS P5G41T-M LX Series  
2-3  
 
2.2  
BIOS setup program  
Use the BIOS Setup program to update the BIOS or configure its parameters. The BIOS  
screens include navigation keys and brief online help to guide you in using the BIOS Setup  
program.  
Entering BIOS Setup at startup  
To enter BIOS Setup at startup:  
Press <Delete> during the Power-On Self Test (POST). If you do not press <Delete>,  
POST continues with its routines.  
Entering BIOS Setup after POST  
To enter BIOS Setup after POST:  
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. Do this option only if you  
failed to enter BIOS Setup using the first two options.  
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 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.  
2-4  
Chapter 2: BIOS information  
 
2.2.1  
BIOS menu screen  
Menu items  
Menu bar  
Configuration fields  
General help  
BIOS SETUP UTILITY  
Boot Tools Exit  
Main  
Advanced  
Power  
Use [ENTER], [TAB] or  
[SHIFT-TAB] to select  
a field.  
System Time  
System Date  
[00:31:48]  
[Tue 01/01/2002]  
Use [+] or [-] to  
configure system Time.  
Primary IDE Master  
Primary IDE Slave  
SATA 1  
:[Not Detected]  
:[Not Detected]  
:[Not Detected]  
:[Not Detected]  
:[Not Detected]  
:[Not Detected]  
SATA 2  
SATA 3  
SATA 4  
Select Screen  
Select Item  
Storage Configuration  
System Information  
+-  
Change Field  
Tab Select Field  
F1  
General Help  
F10 Save and Exit  
ESC Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
Submenu 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 configuring options for special functions.  
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.  
ASUS P5G41T-M LX Series  
2-5  
 
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  
Submenu items  
A solid triangle before each item on any menu screen means that the item has a submenu. To  
display the submenu, 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  
2.2.7 Pop-up window.  
2.2.7  
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  
+-  
Change Field  
2.2.8  
Scroll bar  
Tab Select Field  
F1  
General Help  
F10 Save and Exit  
ESC Exit  
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  
v02.58 (C)Copyright 1985-2009, American, AmericanMegatrends, Inc.  
Pop-up window  
Scroll bar  
Down> keys to display the other items on the screen.  
2.2.9  
General help  
At the top right corner of the menu screen is a brief description of the selected item.  
2-6  
Chapter 2: BIOS information  
 
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  
System Date  
[12:56:38]  
[Tue 01/01/2002]  
Primary IDE Master  
:[Not Detected]  
:[Not Detected]  
:[Not Detected]  
:[Not Detected]  
:[Not Detected]  
:[Not Detected]  
Use [+] or [-] to  
configure system time.  
Primary IDE Slave  
SATA 1  
SATA 2  
SATA 3  
SATA 4  
Storage Configuration  
System Information  
Select Screen  
Select Item  
+-  
Change Field  
Tab Select Field  
F1  
General Help  
F10 Save and Exit  
ESC Exit  
v02.61 (C)Copyright 1985-2009, 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  
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/SATA 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 Not Detected 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 the SATA 1/2/3/4 devices.  
ASUS P5G41T-M LX Series  
2-7  
 
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]  
2.3.4  
Storage Configuration  
The items in this menu allow you to set or change the configurations for the SATA devices  
installed in the system. Select an item then press <Enter> if you want to configure the item.  
ATA/IDE Configuration [Enhanced]  
Allows you to set the ATA/IDE configuration.  
Configuration options: [Disabled] [Compatible] [Enhanced]  
Enhanced Mode Support On [S-ATA]  
Sets Serial ATA, Parallel ATA or both as native mode.  
Configuration options: [S-ATA+P-ATA] [S-ATA] [P-ATA].  
IDE Detect Time Out (Sec) [35]  
Selects the time out value for detecting ATA/ATAPI devices.  
Configuration options: [0] [5] [10] [15] [20] [25] [30] [35]  
2-8  
Chapter 2: BIOS information  
 
2.3.5  
System Information  
This menu gives you an overview of the general system specifications. The BIOS  
automatically detects the items in this menu.  
BIOS Information  
Displays the auto-detected BIOS information.  
Processor  
Displays the auto-detected CPU specification.  
System Memory  
Displays the auto-detected system memory.  
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  
Adjust System  
frequency/voltage.  
JumperFree Configuration  
CPU Configuration  
Chipset  
Onboard Devices Configuration  
USB Configuration  
PCIPnP  
2.4.1  
JumperFree Configuration  
The items in this menu allows you to adjust the system frequency/voltage.  
PCI/PCIe CLK Status [Enabled]  
Enables or disables the clock for PCI/PCIe slots. Configuration options: [Disabled] [Enabled]  
Ai Overclocking [Auto]  
Allows selection of CPU overclocking options to achieve desired CPU internal frequency.  
Select either one of the preset overclocking configuration options:  
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.  
ASUS P5G41T-M LX Series  
2-9  
 
The following two items appear only when you set the AI Overclocking item to [MANUAL].  
CPU Frequency [xxx]  
Displays the frequency sent by the clock generator to the system bus and PCI bus. The  
value of this item is auto-detected by the BIOS. Use the <+> and <-> keys to adjust  
the CPU frequency. You can also type the desired CPU frequency using the numeric  
keypad. The values range from 200 to 800. Refer to the table below for the correct  
Front Side Bus and CPU External Frequency settings.  
FSB / CPU External Frequency Synchronization  
Front Side Bus  
FSB 1333  
CPU External Frequency  
333 MHz  
FSB 1066  
266 MHz  
FSB 800  
200 MHz  
PCI Express Frequency [Auto]  
Allows you to select the PCI Express frequency. Configuration options: [Auto] [90] [91]  
[92]~[150]  
The following item appears only when you set the AI Overclocking item to [Overclock  
Profile].  
Overclock Options [Overclock 5%]  
Allows you to select the overclock options. Configuration options: [Overclock 5%]  
[Overclock 10%] [Overclock 15%] [Overclock 20%] [Test Mode]  
DRAM Frequency [Auto]  
Allows you to set the DRAM frequency. Configuration options: [Auto] [800 MHz] [1067MHz]  
The following table shows the DRAM Frequency options that appear when the FSB value is  
1333, 1066, and 800.  
DRAM Frequency  
FSB  
Auto  
667MHz  
800MHz  
960MHz  
1000MHz  
1067MHz  
1100MHz  
1333  
1066  
800  
v
v
v
v
v
v
v
v
v
v
v
v
Selecting a very high DRAM frequency may cause the system to become unstable! If this  
happens, revert to the default setting.  
2-10  
Chapter 2: BIOS information  
Memory Voltage [Auto]  
Allows you to set the memory voltage. The values range from 1.20000V to 2.4600V with a  
0.02000V increment. Key in the value directly or use +/- to adjust the voltage.  
Configuration options: [Auto]  
NB Voltage [Auto]  
Allows you to set the Northbridge voltage. The values range from 1.12500V to 1.51875V with  
a 0.00625V increment. Key in the value directly or use +/- to adjust the voltage.  
Configuration options: [Auto]  
VTT Voltage [Auto]  
Allows you to set the VTT voltage. The values range from 1.20000V to 1.59375V with a  
0.00625V increment. Key in the value directly or use +/- to adjust the voltage.  
Configuration options: [Auto]  
CPU Vcore [Auto]  
Allows you to set the CPU Vcore voltage. Configuration options: [Auto] [+50mv] [+100mv]  
[+150mv]  
Auto PSI [Enabled]  
Allows you to enable or disable the Auto PSI mode.  
Configuration options: [Disabled] [Enabled]  
2.4.2  
CPU Configuration  
The items in this menu show the CPU-related information that the BIOS automatically  
detects.  
Ratio CMOS Setting [Auto]  
Sets the ration between CPU core clock and the FSB frequency. Configuration option: [Auto]  
If an invalid ratio is set in CMOS then actual and set values may differ.  
Key in ratio numbers directly.  
C1E Support [Enabled]  
Allows you to enable or disable C1E Support. Configuration options: [Disabled] [Enabled]  
Max CPUID Value Limit [Disabled]  
Setting this item to [Enabled] allows legacy operating systems to boot even without support  
for CPUs with extended CPUID functions. Configuration options: [Disabled] [Enabled]  
Intel(R) Virtualization Tech [Enabled]  
Enables or disables Intel® Virtualization Technology. Virtualization enhanced by Intel®  
Virtualization Technology allows a platform to run multiple operating systems and applications  
in independent partitions. With virtualization, one computer system can function as multiple  
virtual systems. Configuration options: [Enabled] [Disabled]  
ASUS P5G41T-M LX Series  
2-11  
 
CPU TM Function [Enabled]  
Enables or disables Intel® CPU Thermal Monitor (TM) function, a CPU overheating protection  
function. When enabled, the CPU core frequency and voltage are reduced when the CPU  
overheats. Configuration options: [Disabled] [Enabled]  
Execute-Disable Bit Capability [Enabled]  
Allows you to enable or disable the No-Execution Page Protection Technology. Setting this  
item to [Disabled] forces the XD feature flag to always return to zero (0).  
Configuration options: [Disabled] [Enabled]  
The following item appears only when you installed an Intel® Pentium® 4 or later CPU that  
supports the Enhanced Intel SpeedStep® Technology (EIST).  
Intel(R) SpeedStep(TM) Tech [Enabled]  
Allows you to use the Enhanced Intel® SpeedStep® Technology. When set to [Enabled], you  
can adjust the system power settings in the operating system to use the EIST feature. Set this  
item to [Disabled] if you DO NOT want to use the EIST.  
Configuration options: [Enabled] [Disabled]  
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.  
North Bridge Configuration  
Memory Remap Feature [Enabled]  
Allows you to enable or disable the remapping of overlapped PCI memory above the total  
physical memory. Configuration options: [Disabled] [Enabled]  
Configure DRAM Timing by SPD [Enabled]  
Allows you to enable or disable configurating DRAM Timing by SPD.  
Configuration options: [Enabled] [Disabled]  
Initiate Graphic Adapter [PEG/PCI]  
Allows you to select the graphics controller as the primary boot device.  
Configuration options: [IGD] [IGD+PEG(Dual)] [PCI/IGD] [PCI/PEG] [PEG/IGD] [PEG/PCI]  
IGD Graphics Mode Select [Enabled, 32MB]  
Allows you to select the amout of system memory used by the Interanal graphics device.  
Configuration options: [Disabled] [Enabled, 32MB] [Enabled, 48MB] [Enabled, 64MB]  
[Enabled, 128MB] [Enabled, 256MB]  
GTT Graphics Memory Size [No VT mode, 2MB]  
This item is not user- configurable.  
2-12  
Chapter 2: BIOS information  
 
DVMT Memory [256MB]  
Allows you to select the DVMT memory.  
Configuration options: [128MB] [256MB] [Maximum DVMT]  
Protect Audio Video Path Mode [Lite]  
Allows you to select the Protected Audio-Video Path (PAVP) mode.  
Configuration options: [Disabled] [Lite] [Paranoid]  
South Bridge Configuration  
Audio Controller [Enabled]  
Allows you to set the audio controller. Configuration options: [Enabled] [Disabled]  
Front Panel Type [HD Audio]  
Allows you to select the front panel support type. If High Definition Audio Front Panel  
used, set this item to [HD Audio] mode. Configuration options: [AC97] [HD Audio]  
2.4.4  
Onboard Devices Configuration  
Onboard Gigabit LAN [Enabled]  
Allows you to enable or disable the onboard Gigabit LAN controller.  
Configuration options: [Enabled] [Disabled]  
Onboard LAN Boot ROM [Disabled]  
Allows you to enable or disable the boot ROM in the onboard LAN controller. This item  
appears only when the Onboard LAN item is set to Enabled.  
Configuration options: [Disabled] [Enabled]  
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 [ECP]  
Allows you to select the Parallel Port mode.  
Configuration options: [Normal] [Bi-Directional] [EPP] [ECP]  
ECP Mode DMA Channel [DMA3]  
Appears only when the Parallel Port Mode is set to [ECP]. This item allows you to set  
the Parallel Port ECP DMA. Configuration options: [DMA0] [DMA1] [DMA3]  
EPP Version [1.9]  
Appears only when the Parallel Port Mode is set to [EPP].  
Configuration options: [1.9] [1.7]  
Parallel Port IRQ [IRQ7]  
Allows you to select parallel port IRQ. Configuration options: [IRQ5] [IRQ7]  
ASUS P5G41T-M LX Series  
2-13  
 
2.4.5  
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]  
Allows you to disable or enable the USB functions.  
Configuration options: [Disabled] [Enabled]  
USB 2.0 Controller [Enabled]  
Allows you to enable or disable 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 (480Mbps) or Full Speed  
(12Mbps). Configuration options: [FullSpeed] [HiSpeed]  
The following items may only appear when a USB storage device is plugged.  
USB Mass Storage Device Configuration  
USB Mass Storage Reset Delay [20 Sec]  
Allows you to set the maximum time that the BIOS waits for the USB storage device to  
initialize. Configuration options: [10 Sec] [20 Sec] [30 Sec] [40 Sec]  
Emulation Type [Auto]  
Allows you to select the emulation type. Configuration options: [Auto] [Floppy] [Forced  
FDD] [Hard Disk] [CDROM]  
2-14  
Chapter 2: BIOS information  
 
2.4.6  
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]  
2.5  
Power menu  
The Power menu items allow you to change the settings for the Advanced Power  
Management (APM). Select an item then press <Enter> to display the configuration options.  
BIOS SETUP UTILITY  
Main  
Advanced  
Power  
Boot  
Tools  
Exit  
Select the ACPI state  
used for System  
Suspend.  
Suspend Mode  
[Auto]  
ACPI 2.0 Support  
ACPI APIC Support  
Anti Surge Support  
[Enabled]  
[Enabled]  
[Enabled]  
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]  
2.5.2  
ACPI 2.0 Support [Enabled]  
Allows you to add more tables for 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  
Anti Surge Support [Enabled]  
Allows you to enable or disable the Anti-Surge protection. Configuration options: [Disabled]  
[Enabled]  
ASUS P5G41T-M LX Series  
2-15  
 
2.5.5  
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. When set to [Last State], the  
system goes into either off or on state, whatever the system state was before the AC power  
loss. Configuration options: [Power Off] [Power On] [Last State]  
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]  
Power On By External Modem [Disabled]  
This allows either settings of [Enabled] or [Disabled] for powering up the computer  
when the external modem receives a call while the computer is in Soft-off mode.  
Configuration options: [Disabled] [Enabled]  
Power On By PCI (E) Device [Disabled]  
When set to [Enabled], this parameter allows you to wake the system through a PCI Express/  
PCI card. This feature requires an ATX power supply that provides at least 1A on the +5VSB  
lead. Configuration options: [Disabled] [Enabled]  
Power On By PS/2 Keyboard [Disabled]  
Allows you to use specific keys on the keyboard to turn on the system. This feature requires  
an ATX power supply that provides at least 1A on the +5VSB lead. Configuration options:  
[Disabled] [Space Bar] [Ctrl-Esc] [Power Key]  
Power On By PS/2 Mouse [Disabled]  
When set to [Enabled], this parameter allows you to use the PS/2 mouse to turn on the  
system. This feature requires an ATX power supply that provides at least 1A on the +5VSB  
lead. Configuration options: [Disabled] [Enabled]  
2.5.6  
Hardware Monitor  
CPU Temperature [xxxºC/xxxºF] or [Ignored]  
MB Temperature [xxxºC/xxxºF] or [Ignored]  
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/Chassis Fan Speed [xxxxRPM] or [Ignored]  
The onboard hardware monitor automatically detects and displays the CPU/chassis fan  
speeds 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.  
CPU Q-Fan Control [Enabled]  
Allows you to enable or disable the CPU Q-Fan function. Configuration options: [Disabled]  
[Enabled]  
2-16  
Chapter 2: BIOS information  
 
CPU Fan Profile [Optimal Mode]  
This item appears only when you enable the CPU Q-Fan Control feature and allows you to  
set the appropriate performance level of the CPU fan. Configuration options: [Optimal Mode]  
[Silent Mode] [Performance Mode]  
VCORE Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage [xxxV] or [Ignored]  
The onboard hardware monitor automatically detects the voltage output through the onboard  
voltage regulators.  
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  
Boot Settings  
Boot Device Priority  
Advanced  
Power  
Boot  
Tools  
Exit  
Specifies the Boot  
Device Priority  
sequence.  
A virtual floppy disk  
drive (Floppy Drive B:  
) may appear when you  
set the CD-ROM drive  
as the first boot  
Boot Settings Configuration  
Security  
device.  
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: [Removable Dev.] [Hard Drive]  
[ATAPI CD-ROM] [Disabled]  
To select the boot device during system startup, press <F8> when ASUS Logo appears.  
To access Windows® OS in Safe Mode, do any of the following:  
Press <F5> when ASUS Logo appears.  
Press <F8> after POST.  
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]  
ASUS P5G41T-M LX Series  
2-17  
 
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 MyLogo2feature.  
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]  
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]  
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.  
2.  
Select the Change Supervisor Password item and press <Enter>.  
In the password box, key in a password containing up to six letters or numbers, or  
both, 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 in setting a supervisor password.  
To clear the supervisor password, select the Change Supervisor Password then press  
<Enter> twice. 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.  
2-18  
Chapter 2: BIOS information  
 
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.  
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.  
2.  
Select the Change User Password item and press <Enter>.  
In the password box, key in a password containing up to six letters or numbers, or  
both, 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 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]  
ASUS P5G41T-M LX Series  
2-19  
2.7  
Tools menu  
The Tools menu items allow you to configure options for special functions. Select an item  
then press <Enter> to display the sub-menu.  
BIOS SETUP UTILITY  
Main Advanced  
ASUS EZ Flash 2  
AI NET 2  
Power  
Boot  
Tools  
Exit  
Press ENTER to run  
the utility to select  
and update BIOS.  
This utility supports  
1.FAT 12/16/32 (r/w)  
2.NTFS (read only)  
3.CD-DISC (read only)  
2.7.1  
ASUS EZ Flash 2  
Allows you to run ASUS EZ Flash 2. When you press <Enter>, a confirmation message  
appears. Use the left/right arrow key to select between [Yes] or [No], then press <Enter> to  
confirm your choice. See section 2.1.2 ASUS EZ Flash 2 for details.  
2.7.2  
AI NET 2  
Check Realtek LAN cable [Disabled]  
Enables or disables checking of the Realtek LAN cable during the Power-On Self-Test  
(POST). Configuration options: [Disabled] [Enabled]  
2-20  
Chapter 2: BIOS information  
 
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.  
BIOS SETUP UTILITY  
Main  
Advanced  
Power  
Boot  
Tools  
Exit  
Exit Options  
Exit system setup  
after saving the  
Exit & Save Changes  
Exit & Discard Changes  
Discard Changes  
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.  
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.  
ASUS P5G41T-M LX Series  
2-21  
 
2-22  
Chapter 2: BIOS information  
ASUS contact information  
ASUSTeK COMPUTER INC.  
Address  
Telephone  
Fax  
E-mail  
Web site  
15 Li-Te Road, Peitou, Taipei, Taiwan 11259  
+886-2-2894-3447  
+886-2-2890-7798  
Technical Support  
Telephone  
Online support  
+86-21-38429911  
support.asus.com  
ASUS COMPUTER INTERNATIONAL (America)  
Address  
Telephone  
Fax  
800 Corporate Way, Fremont, CA 94539, USA  
+1-510-739-3777  
+1-510-608-4555  
usa.asus.com  
Web site  
Technical Support  
Telephone  
Support fax  
+1-812-282-2787  
+1-812-284-0883  
support.asus.com  
Online support  
ASUS COMPUTER GmbH (Germany and Austria)  
Address  
Harkort Str. 21-23, D-40880 Ratingen, Germany  
Fax  
Web site  
Online contact  
+49-2102-959911  
Technical Support  
Telephone (Component)  
Telephone (System/Notebook/Eee/LCD)  
Support Fax  
+49-1805-010923*  
+49-1805-010920*  
+49-2102-9599-11  
support.asus.com  
Online support  
* EUR 0.14/minute from a German fixed landline; EUR 0.42/minute from a mobile phone.  

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