A55BM-A/USB3
Contents
About this guide......................................................................................................... iv
A55BM-A/USB3 specifications summary................................................................. vi
Before you proceed......................................................................................1-1
Motherboard overview .................................................................................1-2
System memory............................................................................................1-7
Expansion slots..........................................................................................1-10
Connectors..................................................................................................1-13
Software support........................................................................................1-21
BIOS setup program.....................................................................................2-5
My Favorites..................................................................................................2-9
Main menu...................................................................................................2-10
Advanced menu..........................................................................................2-12
Monitor menu..............................................................................................2-12
Boot menu...................................................................................................2-13
Tools menu..................................................................................................2-14
2.10 Exit menu ....................................................................................................2-14
iii
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 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.
iv
Where to find more information
Refer to the following sources for additional information and for product and software
updates.
1.
2.
ASUS websites
The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.
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.
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.
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 (+).
v
Package contents
Check your motherboard package for the following items.
Motherboard
Cables
ASUS A55BM-A/USB3 motherboard
2 x Serial ATA 3.0 Gb/s cables
1 x I/O Shield
Accessories
Application DVD
Documentation
Support DVD
User Guide
If any of the above items is damaged or missing, contact your retailer.
A55BM-A/USB3 specifications summary
APU
AMD® FM2+ Socket for AMD® A-series/Athlon™ Series processors
AMD® Turbo Core Technology 3.0 support
Supports APU up to 4 cores
•
Chipset
Memory
AMD® A55 FCH (Hudson D2)
2 x DDR3 DIMM, max. 32GB, DDR3 2133 / 1866 / 1600 / 1333 MHz, non-
ECC un-buffered memory
Dual-channel memory architecture
Supports AMD Memory Profile (AMP) memory
•
•
The maximum 32GB memory capacity can be supported with 16GB or above
DIMMs. ASUS will update the memory QVL once the DIMMs are available in the
market.
Hyper DIMM support is subject to the physical characteristics of individual
APUs.
•
•
Refer to www.asus.com for the latest Memory QVL (Qualified Vendors List).
When you install a total memory of 4GB capacity 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 AMD® Radeon™ HD 7000 / 8000 Series Graphics in the A-
Series APU
Supports HDMI with max. resolution 4096 x 2160* @24Hz / 1920 x
1200@60Hz
Supports Dual-link DVI with max. resolution 2560x1600@60Hz
Supports D-Sub with max. resolution 1920x1600@60Hz
AMD® Dual Graphics technology support*
Maximum shared memory of 2G
Supports AMD® Dual Graphics technology
*
•
Only FM2+ APU can support up to 4096 x 2160 resolution display via HDMI port
Pages/dual-graphics.aspx#3 for the discrete GPUs which support Dual Graphics
technology.
Expansion slots
1 x PCIe 3.0/2.0 x16 slot*
1 x PCIe 2.0 x1 slots
1 x PCI slot
•
PCIe 3.0 is supported by FM2+ processors only.
(continued on the next page)
vi
A55BM-A/USB3 specifications summary
Storage / RAID
AMD® A55 FCH:
6 x Serial ATA 3.0Gb/s connectors support RAID 0, RAID 1, RAID 10 and
JBOD configurations
-
Realtek® 8111G PCIe Gigabit LAN controller
LAN
Audio
Realtek® ALC887-VD 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
AMD® A55 FCH:
-
-
2 x USB 3.0/2.0/1.1 ports (at the back panel)
6 x USB 2.0/1.1 ports (4 ports at the mid-board, 2 ports at the back panel)
ASUS unique
features
ASUS 5X Protection
- ASUS motherboards safeguard your PC with 5X Protection: DIGI+VRM,
DRAM Fuse, ESD Guards, High-Quality 5K-Hour Solid Capacitors,
and Stainless Steel Back I/O to ensure the best quality, reliability, and
durability
ASUS Digital Power Design
- Industry-leading digital 3+1 power design
ASUS DRAM Fuse
- Enhanced DRAM overcurrent protection and short circuit damage
prevention
ASUS ESD Guards
- Strong ESD protection for extended component lifespan
ASUS High-Quality 5K-Hour Solid Capacitors
- 2.5x Longer Lifespan with excellent durability
ASUS Stainless Steel Back I/O
- 3x More durable corrosion-resistant coating
ASUS Exclusive Features
- Network iControl
- ASUS USB 3.0 Boost
- ASUS EPU
- ASUS AI Suite III
- ASUS AI Charger+
- ASUS Anti-Surge Protection
ASUS Quiet Thermal Solution
- ASUS Fanless Design: Stylish Heatsink Solution
- ASUS Fan Xpert
ASUS EZ DIY
- ASUS UEFI BIOS EZ Mode featuring friendly graphics user interface
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
- ASUS MyLogo 2™
(continued on the next page)
vii
A55BM-A/USB3 specifications summary
Back Panel I/O
ports
1 x PS/2 mouse port (green)
1 x PS/2 keyboard port (purple)
1 x HDMI port
1 x DVI-D port
1 x D-Sub output port
1 x LAN (RJ-45) port
2 x USB 3.0/2.0/1.1 ports
2 x USB 2.0/1.1 ports
8-channel audio I/O ports (3-jack)
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports
6 x SATA 3.0Gb/s connectors
1 x COM connector
Internal I/O
connectors
1 x System panel connector
1 x Internal Speaker connector
1 x CPU fan connector (4-pin)
1 x S/PDIF output connector
1 x Chassis fan connector (4-pin)
1 x Front panel audio connector
1 x 24-pin EATX power connector
1 x 4-pin ATX 12V power connector
BIOS
64 Mb Flash ROM, UEFI AMI BIOS, PnP, DMI 2.0, WfM 2.0, SM BIOS 2.7,
ACPI 2.0a, Multi-language BIOS, ASUS EZ Flash 2, ASUS CrashFreen
BIOS 3, F12 Printscreen function, F3 Shortcut function and ASUS DRAM
SPD (Serial Presence Detect) memory information
Support DVD
Drivers
ASUS Update
ASUS utilities
Anti-Virus software (OEM version)
Windows® 8 / 8 64bit
Windows® 7 / 7 64bit
Windows® Vista / Vista 64-bit
Windows® XP
Operating System
Support
Form factor
uATX form factor: 8.9 in x 7.2 in (22.6 cm x 18.3 cm)
Specifications are subject to change without notice.
viii
Product introduction
1
1.1
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.
Standby Power 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
A55BM-A/USB3
ON OFF
Standby Power Powered Off
A55BM-A/USB3 Onboard LED
1-1
ASUS A55BM-A/USB3
1.2
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.
1.2.1
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.
1.2.2
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
A55BM-A/USB3
1-2
Chapter 1: Product introduction
1.2.3
Motherboard layout
1
2
3
4
5
18.3cm(7.2in)
CPU_FAN CHA_FAN
KBMS
DIGI
+VRM
ATX12V
HDMI
USB3_12
LAN_USB12
AUDIO
ASM
1042
2
6
A55BM-A/USB3
RTL
8111G
PCIEX16
AMD®
A55
Super
I/O
BATTERY
PCIEX1_1
7
8
SPEAKER
F_PANEL
SB_PWR
ALC
887
PCI1
64Mb
BIOS
SPDIF_OUT
USBPWF
CLRTC USB56
COM
SATA3G_1
SATA3G_2
SATA3G_3
USB34
AAFP
15 14 13
12
11 10
9
7
Connectors/Jumpers/Slots/LED
1. Keyboard power (3-pin KB_USBPWB)
Page
1-12
1-16
1-4
2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
3. AMD FM2+ socket
4. CPU and chassis fan connectors (4-pin CPU_FAN and 4-pin CHA_FAN)
5. DDR3 DIMM slots
1-15
1-7
6. Speaker connector (4-pin SPEAKER)
7. SATA 3.0Gb/s connectors (7-pin SATA3G_1~6)
8. System panel connector (10-1 pin F_PANEL)
9. USB 2.0 connectors (10-1 pin USB34, USB56)
10. Clear RTC RAM (3-pin CLRTC)
1-18
1-17
1-18
1-20
1-11
1-12
1-19
1-20
1-1
11. USB device wake-up (3-pin USBPWF)
12. Digital audio connector (4-1 pin SPDIF_OUT)
13. Serial port connector (10-1 pin COM)
14. Standby power LED (SB_PWR)
15. Front panel audio connector (10-1 pin AAFP)
1-19
1-3
ASUS A55BM-A/USB3
1.3
Accelerated Processing Unit (APU)
This motherboard comes with an FM2+ socket designed for AMD® A-series accelerated
processors with AMD® Radeon™ HD 7000/8000 series graphics.
A55BM-A/USB3
A55BM-A/USB3 CPU socket FM2+
Ensure that you use an APU designed for the FM2+ socket. The APU fits in only one
correct orientation. DO NOT force the APU into the socket to prevent bending the pins and
damaging the APU!
1.3.1
1
Installing the APU
2
1-4
Chapter 1: Product introduction
3
4
1.3.2
APU heatsink and fan assembly installation
Apply the Thermal Interface Material
to the APU heatsink and APU before
you install the heatsink and fan if
necessary.
To install the APU heatsink and fan assembly
1
2
1-5
ASUS A55BM-A/USB3
3
4
5
To uninstall the APU heatsink and fan assembly
3
1
2
4
5
1-6
Chapter 1: Product introduction
1.4
System memory
Overview
1.4.1
The motherboard comes with two Double Data Rate 3 (DDR3) Dual Inline Memory Modules
(DIMM) sockets.
A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched
differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are developed for
better performance with less power consumption.
The figure illustrates the location of the DDR3 DIMM sockets:
Channel
Sockets
DIMM_A1
DIMM_B1
Channel A
Channel B
A55BM-A/USB3
A55BM-A/USB3 240-pin DDR3 DIMM sockets
1-7
ASUS A55BM-A/USB3
1.4.2
Memory configurations
You may install 1GB, 2GB, 4GB, and 8GB 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 optimal compatibility, we
recommend that you install memory modules of the same version or date code (D/C)
from the same vendor. Check with the retailer to get the correct memory modules.
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:
-
-
Install a maximum of 3GB system memory if you are using a 32-bit Windows®
OS.
Use a 64-bit Windows® OS if you want to install 4GB or more memory on the
motherboard.
•
•
This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less.
The maximum 32GB memory capacity can be supported with 16GB or above DIMMs.
ASUS will update the memory QVL once the DIMMs are available in the market.
•
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. To operate at the vendor-marked
or at a higher frequency, refer to section 2.5 Ai Tweaker menu for manual memory
frequency adjustment.
•
For system stability, use a more efficient memory cooling system to support a full
memory load (2 DIMMs) or overclocking condition.
•
Refer to www.asus.com for the latest Memory QVL (Qualified Vendors List).
1-8
Chapter 1: Product introduction
1.4.3
1
Installing a DIMM
2
3
To remove a DIMM
B
A
1-9
ASUS A55BM-A/USB3
1.5
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.
1.5.1
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.
1.5.2
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.
1.5.3
PCI slot
The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other cards that
comply with PCI specifications.
1-10
Chapter 1: Product introduction
1.5.4
PCI Express x1 slot
This motherboard supports PCI Express 2.0 x1 network cards, SCSI cards, and other cards
that comply with the PCI Express specifications.
1.5.5
PCI Express x16 slot
This motherboard supports one PCI Express 3.0/2.0 x16 graphics cards that comply with the
PCI Express specifications.
IRQ assignments for this motherboard
A
B
C
D
E
F
G
H
PCIEx16_1
–
–
shared
–
–
–
–
–
PCIEx1_1
shared
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
PCI1 slot
–
–
–
shared
Realtek LAN controller
HD audio
–
shared
–
shared
–
–
-
–
–
–
–
SATA controller
shared
On Chip USB EHCI 1/2/3
On Chip USB OHCI 1/2/3/4
–
–
shared
–
–
–
–
–
–
–
–
–
–
–
–
shared
1.6
Jumpers
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.
CLRTC
A55BM-A/USB3
1
2
2
3
Normal
(Default)
Clear RTC
A55BM-A/USB3 Clear RTC RAM
1-11
ASUS A55BM-A/USB3
To erase the RTC RAM:
1.
2.
Turn OFF the computer and unplug the power cord.
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.
4.
Plug the power cord and turn ON the computer.
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.
2.
USB device wake-up (3-pin USBPWF)
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).
USBPWF
2
A55BM-A/USB3
1
2
3
+5VSB
+5V
(Default)
A55BM-A/USB3 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.
1-12
Chapter 1: Product introduction
3.
Keyboard and USB device wake up (3-pin KB_USBPWB)
This jumper allows you to enable or disable the keyboard and USB device 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.
KB_USBPWB
A55BM-A/USB3
+5VSB
(Default)
+5V
A55BM-A/USB3 Keyboard and USB device wake up
1.7
Connectors
1.7.1
Rear panel connectors
1
2
3
4 5
11
9
7
6
10
8
1.
PS/2 Mouse port (green). This port is for a PS/2 mouse.
2.
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.
1-13
ASUS A55BM-A/USB3
ACT/LINK SPEED
LED LED
LAN port LED indications
Activity/Link LED
Speed LED
Status
Description
Status
Description
Off
No link
OFF
10Mbps connection
100Mbps connection
1Gbps connection
Orange
Linked
ORANGE
GREEN
LAN port
Orange (Blinking)
Data activity
Orange (Blinking
then steady)
Ready to wake up
from S5 mode
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 2, 4, 6, or
8-channel configuration.
Audio 2, 4, 6, or 8-channel configuration
Headset
2-channel
Port
4-channel
6-channel
8-channel
Light Blue (Rear panel)
Lime (Rear panel)
Line In
Rear Speaker Out Rear Speaker Out Rear Speaker Out
Line Out Front Speaker Out Front Speaker Out Front Speaker Out
Pink (Rear panel)
Lime (Front panel)
Mic In
—
Mic In
—
Bass/Center
—
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 an 8-channel audio
output.
7.
8.
USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are for USB
2.0/1.1 devices.
USB 3.0 ports 1 and 2. These two 9-pin Universal Serial Bus (USB) ports are for USB
3.0 devices.
•
•
DO NOT connect a keyboard / mouse to any USB 3.0 port when installing Windows®
operating system.
Due to USB 3.0 controller limitations, USB 3.0 devices can only be used under a
Windows® OS environment and after USB 3.0 driver installation.
•
•
USB 3.0 devices can only be used for data storage.
We strongly recommend that you connect USB 3.0 devices to USB 3.0 ports for faster
and better performance from your USB 3.0 devices.
1-14
Chapter 1: Product introduction
9.
DVI-D 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.
10. HDMI port. This port is for a High-Definition Multimedia Interface (HDMI) connector,
and is HDCP compliant allowing playback of HD DVD, Blu-ray, and other protected
content.
11. PS/2 Keyboard port (purple). This port is for a PS/2 keyboard.
1.7.2
Internal connectors
1.
CPU and chassis fan connectors (4-pin CPU_FAN, and 4-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.
CPU_FAN CHA_FAN
A55BM-A/USB3
A55BM-A/USB3 Fan connectors
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.
•
•
The CPU_FAN connector supports a CPU fan of maximum 2A (24 W) fan power.
The CPU_FAN and CHA_FAN connectors support the ASUS Fan Xpert feature.
1-15
ASUS A55BM-A/USB3
2.
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
+3 Volts
GND
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
PIN 1
+5 Volts
GND
GND
GND
A55BM-A/USB3
+5 Volts
GND
PSON#
GND
+3 Volts
+3 Volts
-12 Volts
+3 Volts
PIN 1
A55BM-A/USB3 ATX power connectors
•
•
We recommend that you use an ATX 12V Specification 2.0-compliant power supply
unit (PSU) with a minimum of 300W 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 300W. 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,
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
1-16
Chapter 1: Product introduction
3.
Serial ATA 3.0 Gb/s connectors (7-pin SATA3G 1~6)
These connectors are for the Serial ATA 3.0 Gb/s signal cables for Serial ATA hard
disk drives and optical disc drives. If you installed Serial ATA hard disk drives, you can
create a RAID 0, RAID 1, or RAID 10 configuration through the onboard controller.
SATA3G_6
GND
RSATA_RXP6
RSATA_RXN6
GND
RSATA_TXN6
RSATA_TXP6
GND
SATA3G_5
GND
RSATA_RXP5
RSATA_RXN5
GND
RSATA_TXN5
RSATA_TXP5
GND
SATA3G_4
GND
RSATA_RXP4
RSATA_RXN4
GND
SATA3G_1 SATA3G_2 SATA3G_3
RSATA_TXN4
RSATA_TXP4
GND
A55BM-A/USB3
A55BM-A/USB3 SATA 3.0Gb/s connectors
•
•
•
These connectors are set to AHCI mode by default. If you intend to create a Serial ATA
RAID set using these connectors, set the type of the SATA connectors in the BIOS to
[RAID].
You must install Windows® XP Service Pack 3 or later version before using Serial
ATA hard disk drives. The Serial ATA RAID feature is available only if you are using
Windows® XP SP3 or later version.
When using hot-plug and NCQ, set the type of the SATA connectors in the BIOS to
[AHCI].
1-17
ASUS A55BM-A/USB3
4.
System panel connector (10-1 pin PANEL)
This connector supports several chassis-mounted functions.
F_PANEL
PWR_LED PWR_BTN
PIN 1
A55BM-A/USB3
+HDD_LED RESET
A55BM-A/USB3 System panel connector
•
System power LED (2-pin PWR_LED)
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 HDD_LED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable
to this connector. The HDD LED lights up or flashes when data is read from or written
to the HDD.
•
•
ATX power button/soft-off button (2-pin PWR_BTN)
This 2-pin 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.
5.
Speaker connector (4-pin SPEAKER)
The 4-pin connector is for the chassis-mounted system warning speaker. The speaker
allows you to hear system beeps and warnings.
SPEAKER
A55BM-A/USB3
PIN 1
A55BM-A/USB3 Speaker Out Connector
1-18
Chapter 1: Product introduction
6.
Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port.
A55BM-A/USB3
SPDIF_OUT
A55BM-A/USB3 Digital audio connector
The S/PDIF module is purchased separately.
7.
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.
AAFP
PIN 1
PIN 1
A55BM-A/USB3
HD-audio-compliant
pin definition
Legacy ACʼ97
compliant definition
A55BM-A/USB3 Front panel audio 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, set
the Front Panel Type item in the BIOS to [HD].
The front panel audio I/O module is purchased separately.
1-19
ASUS A55BM-A/USB3
8.
USB 2.0 connectors (10-1 pin USB34, USB56)
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
480Mbps connection speed.
USB56
USB34
A55BM-A/USB3
PIN 1
PIN 1
A55BM-A/USB3 USB2.0 connectors
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
The USB 2.0 module is purchased separately.
9.
Serial port connector (10-1 pin COM)
This connector is for a serial (COM) port. Connect the serial port module cable to this
connector, then install the module to a slot opening at the back of the system chassis.
COM
PIN 1
A55BM-A/USB3
Serial port connectors
A55BM-A/USB3
The COM module is purchased separately.
1-20
Chapter 1: Product introduction
1.8
Software support
1.8.1
Installing an operating system
This motherboard supports Windows® Vista / 64-bit Windows® Vista /Windows® XP /
Windows® 7 / 64-bit Windows® 7 / Windows® 8 /64-bit Windows® 8 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 versions before installing
the drivers for better compatibility and system stability.
Only motherboards installed with an AMD Trinity APU support Windows® Vista / 64bit
Windows® Vista operaing system.
1.8.2
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 into the optical drive. If Autorun is enabled in your computer, the
DVD automatically displays the Specials screen which contains the unique features of ASUS
motherboard. Click Drivers, Utilities, Make Disk, Manual, Contact and Specials tabs to display
their respective menus.
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.
1-21
ASUS A55BM-A/USB3
1-22
Chapter 1: Product introduction
BIOS information
2
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
EZ Update
EZ Update is a utility that allows you to automatically update your motherboard’s softwares,
drivers and the BIOS version easily. With this utlity, you can also manually update the saved
BIOS and select a boot logo when the system goes into POST.
To launch EZ Update, click EZ Update on the AI Suite 3 main menu bar.
Model Name: A55BM-A/USB3
Version:0203
Release Date: 05/28/2013
Click to automatically
update your
motherboard’s
driver, software and
File: A55BM-A_USB3-ASUS-0205.CAP
Model Name: A55BM-A/USB3
Version:0205
Release Date: 06/18/2013
firmware
C:\Users\test\Downloads\A55BM-A_USB3-ASUS-02...
Click to find and
select the BIOS
from file
Click to select a
boot logo
Click to update
the BIOS
EZ Update requires an Internet connection either through a network or an ISP (Internet
Service Provider).
2-1
ASUS A55BM-A/USB3
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.
2.
Enter the Advanced Mode of the BIOS setup program. Go to the Tool menu to select
ASUS EZ Flash 2 Utility and press <Enter> to enable it.
3.
Press <Tab> to switch to the Drive field.
4.
Press the Up/Down arrow keys to find the USB flash disk that contains the latest BIOS,
and then press <Enter>.
5.
Press <Tab> to switch to the Folder Info field.
6.
Press the Up/Down arrow keys to find the BIOS file, and then press <Enter> to perform
the BIOS update process. Reboot the system when the update process is 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!
2.1.3
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 restore a corrupted BIOS
file using the motherboard support DVD or a USB flash drive that contains the updated BIOS
file.
•
•
Before using this utility, rename the BIOS file in the removable device into
A55BMAU3.CAP.
The BIOS file in the support DVD may not be the latest version. Download the latest
BIOS file from the ASUS website at www.asus.com.
2-2
Chapter 2: Getting started
Recovering the BIOS
To recover the BIOS:
1.
Turn on the system.
2.
Insert the support DVD to the optical drive or the USB flash drive that contains the
BIOS file to the USB port.
3.
The utility automatically checks the devices for the BIOS file. When found, the utility
reads the BIOS file and enters ASUS EZ Flash 2 utility automatically.
4.
The system requires you to enter BIOS Setup to recover BIOS setting. To ensure
system compatibility and stability, we recommend that you press <F5> to load default
BIOS values.
DO NOT shut down or reset the system while updating the BIOS! Doing so can cause
system boot failure!
2.1.4
ASUS BIOS Updater
The ASUS BIOS Updater allows you to update BIOS in DOS environment. This utility also
allows you to copy the current BIOS file that you can use as a backup when the BIOS fails or
gets corrupted during the updating process.
The succeeding utility screens are for reference only. The actual utility screen displays may
not be same as shown.
Before updating BIOS
1.
Prepare the motherboard support DVD and a USB flash drive in FAT32/16 format and
single partition.
2.
Download the latest BIOS file and BIOS Updater from the ASUS website at
http://support.asus.com and save them on the USB flash drive.
NTFS is not supported under DOS environment. Do not save the BIOS file and BIOS
Updater to a hard disk drive or USB flash drive in NTFS format.
3.
Turn off the computer and disconnect all SATA hard disk drives (optional).
2-3
ASUS A55BM-A/USB3
Booting the system in DOS environment
1.
Insert the DOS-bootable USB flash drive with the latest BIOS file and BIOS Updater to
your computer’s USB port.
2.
Boot your computer. When the ASUS Logo appears, press <F8> to show the BIOS
Boot Device Select Menu.
3.
Select the USB flash drive as the boot device. The DOS screen appears.
Updating the BIOS file
To update the BIOS file using BIOS Updater:
1.
At the FreeDOS prompt, type bupdater /pc /g and press <Enter>.
2.
The BIOS Updater screen appears as below.
ASUSTek BIOS Updater for DOS V1.30
BOARD: A55BM-A/USB3
VER: 0301
DATE: 07/03/2013
A55BMAU3.CAP
4194304 2013-07-08 17:30:48
2-4
Chapter 2: Getting started
3.
Press <Tab> to switch between screen fields and use the <Up/Down/Home/End> keys
to select the BIOS file and press <Enter>. BIOS Updater checks the selected BIOS file
and prompts you to confirm BIOS update.
4.
Select Yes and press <Enter>. When BIOS update is done, press <ESC> to exit BIOS
Updater. Restart your computer.
DO NOT shut down or reset the system while updating the BIOS to prevent system boot
failure!
•
•
•
For BIOS Updater version 1.30 or later, the utility automatically exits to the DOS
prompt after updating BIOS.
Ensure to load the BIOS default settings to ensure system compatibility and stability.
Select the Load Optimized Defaults item under the Exit menu.
Ensure to connect all SATA hard disk drives after updating the BIOS file if you have
disconnected them.
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.
2-5
ASUS A55BM-A/USB3
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 BIOS setup screens shown in this section are for reference purposes only, and
may not exactly match what you see on your screen.
motherboard.
Ensure that a USB mouse is connected to your motherboard if you want to use the
mouse to control the BIOS setup program.
If the system becomes unstable after changing any BIOS setting, load the default
settings to ensure system compatibility and stability. Select the Load Optimized
Defaults item under the Exit menu or press hotkey F5.
•
If the system fails to boot after changing any BIOS setting, try to clear the CMOS and
reset the motherboard to the default value. See section 1.6 Jumpers for information
on how to erase the RTC RAM.
BIOS menu screen
The BIOS setup program can be used under two modes: EZ Mode and Advanced Mode.
You can change modes from the Exit menu or from the Exit/Advanced Mode button in the EZ
Mode/Advanced Mode screen.
EZ Mode
By default, the EZ Mode screen appears when you enter the BIOS setup program. The EZ
Mode provides you an overview of the basic system information, and allows you to select
the display language, system performance mode and boot device priority. To access the
Advanced Mode, click Exit/Advanced Mode or press F7 for the advanced BIOS settings.
The default screen for entering the BIOS setup program can be changed.
2-6
Chapter 2: Getting started
Selects the display language of the
BIOS setup program
Displays the CPU temperature, CPU voltage output,
DRAM information and CPU/chassis fan speed
Exits the BIOS setup program without saving
the changes, saves the changes and resets
the system, or enters the Advanced Mode
CPU Volt.
Displays the
Advanced mode
menus
Selects the
boot device
priority
SATA information
Loads optimized default
Displays the system
Selects the Advanced
mode functions
Normal mode
properties of the
selected mode on the
right hand side
Selects the boot
device priority
Power Saving
mode
•
•
The boot device options vary depending on the devices you installed to the system.
The Boot Menu(F8) button is available only when the boot device is installed to the
system.
2-7
ASUS A55BM-A/USB3
Advanced Mode
The Advanced Mode provides advanced options for experienced end-users to configure the
BIOS settings. The figure below shows an example of the Advanced Mode. Refer to the
following sections for the detailed configurations.
To access the EZ Mode, click Exit, then select ASUS EZ Mode or press F7.
Back button
Menu items
Menu bar
Configuration fields
General help
Last modified
settings
Pop-up window
Submenu item
Navigation keys
Quick note
Menu bar
The menu bar on top of the screen has the following main items:
My Favorites For saving the frequently-used system settings and configuration
Main
For changing the basic system configuration
For changing the overclocking settings
For changing the advanced system settings
Ai Tweaker
Advanced
For displaying the system temperature, power status, and changing the
fan settings
Monitor
Boot
Tool
Exit
For changing the system boot configuration
For configuring options for special functions
For selecting the exit options and loading default settings
2-8
Chapter 2: Getting started
2.3
My Favorites
MyFavorites is your personal space where you can easily save and access your favorite
BIOS items.
Adding items to My Favorites
To add frequently-used BIOS items to My Favorites:
1.
Use the arrow keys to select an item that you want to add. When using a mouse, hover
the pointer to the item.
2.
Press <F4> on your keyboard or right-click on your mouse to add the item to My
Favorites page.
You cannot add the following items to My Favorites:
•
•
•
Items with submenu options
User-configurable items such as language and boot device order
Configuration items such as Memory SPD Information, system time and date
2-9
ASUS A55BM-A/USB3
2.4
Main menu
The Main menu screen appears when you enter the Advanced Mode of the BIOS Setup
program. The Main menu provides you an overview of the basic system information, and
allows you to set the system date, time, language, and security settings.
•
•
If you have forgotten your BIOS password, erase the CMOS Real Time Clock (RTC)
RAM to clear the BIOS password. See section 1.6 Jumpers for information on how to
erase the RTC RAM.
The Administrator or User Password items on top of the screen show the default
Not Installed. After you set a password, these items show Installed.
2-10
Chapter 2: Getting started
2.5
Ai Tweaker menu
The Ai Tweaker menu items allow you to configure overclocking-related items.
Be cautious when changing the settings of the Ai Tweaker menu items. Incorrect field
values can cause the system to malfunction.
The configuration options for this section vary depending on the CPU and DIMM model you
installed on the motherboard.
Scroll down to display the following items:
2-11
ASUS A55BM-A/USB3
2.6
Advanced menu
The Advanced menu items allow you to change the settings for the CPU and other system
devices.
Be cautious when changing the settings of the Advanced menu items. Incorrect field values
can cause the system to malfunction.
2.7
Monitor menu
The Monitor menu displays the system temperature/power status, and allows you to change
the fan settings.
2-12
Chapter 2: Getting started
2.9
Tools menu
The Tools menu items allow you to configure options for special functions. Select an item
then press <Enter> to display the submenu.
2.10
Exit menu
The Exit menu items allow you to load the optimal default values for the BIOS items, and
save or discard your changes to the BIOS items. You can access the EZ Mode from the Exit
menu.
2-14
Chapter 2: Getting started
Appendices
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.
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.
A-1
A55BM-A/USB3
IC: Canadian Compliance Statement
Complies with the Canadian ICES-003 Class B specifications. This device complies with RSS
210 of Industry Canada. This Class B device meets all the requirements of the Canadian
interference-causing equipment regulations.
This device complies with Industry Canada license exempt RSS standard(s). Operation is
subject to the following two conditions: (1) this device may not cause interference, and (2)
this device must accept any interference, including interference that may cause undesired
operation of the device.
Cut appareil numérique de la Classe B est conforme à la norme NMB-003 du Canada.
Cet appareil numérique de la Classe B respecte toutes les exigences du Règlement sur le
matériel brouilleur du Canada.
Cet appareil est conforme aux normes CNR exemptes de licence d’Industrie Canada. Le
fonctionnement est soumis aux deux conditions suivantes :
(1) cet appareil ne doit pas provoquer d’interférences et
(2) cet appareil doit accepter toute interférence, y compris celles susceptibles de provoquer
un fonctionnement non souhaité de l’appareil.
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.
VCCI: Japan Compliance Statement
VCCI Class B Statement
KC: Korea Warning Statement
A-2
Appendices
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.
ASUS Recycling/Takeback Services
ASUS recycling and takeback programs come from our commitment to the highest standards
for protecting our environment. We believe in providing solutions for you to be able to
responsibly recycle our products, batteries, other components as well as the packaging
information in different regions.
A-3
A55BM-A/USB3
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
+1-812-282-3777
+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
Fax
Harkort Str. 21-23, D-40880 Ratingen, Germany
+49-2102-959911
Web site
Online contact
Technical Support
Telephone
Support Fax
+49-1805-010923*
+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.
A-4
Appendices
A-5
A55BM-A/USB3
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