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Licenses. Such software in this product is distributed without any warranty to the extent permitted by the
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ii
Contents
Safety information ...................................................................................................... iv
About this guide ......................................................................................................... iv
Package contents ....................................................................................................... vi
A55BM-E specications summary ........................................................................... vi
Chapter 1: Product introduction
1.1 Before you proceed ...................................................................................... 1-1
ASUS contact information ...................................................................................... A-4
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 x it by yourself. Contact a qualied 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 qualied service
•
technician or your retailer.
About this guide
This user guide contains the information you need when installing and conguring 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 nd 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 yers,
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 textIndicates a menu or an item to select.
Italics
<Key>Keys enclosed in the less-than and greater-than sign
<Key1> + <Key2> + <Key3>If you must press two or more keys simultaneously, the key
Used to emphasize a word or a phrase.
means that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
names are linked with a plus sign (+).
v
Package contents
Check your motherboard package for the following items.
MotherboardASUS A55BM-E motherboard
Cables2 x Serial ATA 3.0 Gb/s cables
Accessories1 x I/O Shield
Application DVDSupport DVD
DocumentationUser Guide
If any of the above items is damaged or missing, contact your retailer.
A55BM-E specications summary
CPUAMD® FM2+ Socket for AMD® A-Series/Athlon™ Series processors
AMD® Turbo Core Technology 3.0 support
Supports APU up to 4 cores
• Refer to www.asus.com for the AMD® APU support list.
GraphicsIntegrated AMD® Radeon™ HD 8000 / 7000 Series Graphics in the A-
Expansion slots1 x PCIe 3.0/2.0 x16 slot*
ECC un-buffered memory
Dual-channel memory architecture
Supports AMD Memory Prole (AMP) memory
* Hyper DIMM support is subject to the physical characteristics of individual
CPUs.
• 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.
• Refer to
www.asus.com for the latest Memory QVL (Qualied Vendors List).
• When you install a total memory of 4GB capacity or more, Windows
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.
®
32-bit
Series APU
Multi-VGA output support: DVI-D and D-Sub
Supports DVI-D 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
* Refer to http://www.amd.com/us/products/technologies/dual-graphics/
Pages/dual-graphics.aspx#3 for the discrete GPUs which support Dual Graphics
technology.
1 x PCIe 2.0 x1 slot
1 x PCI slot
• PCIe 3.0 is supported by FM2+ processors only.
(continued on the next page)
vi
A55BM-E specications summary
Storage / RAIDAMD® A55 FCH:
- 6 x Serial ATA 3.0Gb/s connectors (dark brown) support RAID 0, RAID 1,
RAID 10, and JBOD congurations
LAN
AudioRealtek
USBAMD® A55 FCH:
ASUS unique
features
Realtek® 8111G Gigabit LAN controller
®
ALC887-VD 8-channel High Denition Audio CODEC
• Use a chassis with HD audio module in the front panel to support a 7.1-channel
audio output.
- 8 x USB 2.0/1.1 ports (4 ports at the mid-board, 4 ports at the back panel)
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 Digi+ VRM
- ASUS DIGI+ VRM: Digital Power Design for the APU
- ASUS 3+1 Phase 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
- EPU
- Network iControl
- AI Suite 3
- AI Charger
- Anti-Surge
ASUS Quiet Thermal Solutions
- ASUS Fanless Design: Stylish heatsink solution
- ASUS Fan Xpert
- ASUS UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
- ASUS MyLogo 2
(continued on the next page)
vii
A55BM-E specications summary
Back Panel I/O
ports
Internal I/O
connectors
BIOS64 Mb Flash ROM, UEFI AMI BIOS, PnP, DMI 2.0, WfM 2.0, SM BIOS 2.6,
Support DVDDrivers
Operating System
Support
Form factor
1 x PS/2 mouse port (green)
1 x PS/2 keyboard port (purple)
1 x DVI-D port
1 x D-Sub output port
1 x LAN (RJ-45) port
4 x USB 2.0/1.1 ports
8-channel audio I/O ports (3-jack)
2 x USB 2.0 connectors support additional 4 USB 2.0 ports
6 x SATA 3.0Gb/s connectors
1 x COM connector
1 x LPT connector
1 x System panel connector
1 x Internal Speaker connector
1 x 4-pin CPU fan connector
1 x S/PDIF output connector
1 x 4-pin Chassis fan connector
1 x Front panel audio connector
1 x 24-pin EATX power connector
1 x 4-pin ATX 12V power connector
ACPI 2.0a, Multi-language BIOS, ASUS CrashFree BIOS 3, F12 Printscreen
function, F3 Shortcut function, and ASUS DRAM SPD (Serial Presence
Detect) memory information
ASUS Update
ASUS utilities
Anti-Virus software (OEM version)
Windows® 8.1 / Windows® 8.1 64-bit
Windows® 8 / Windows® 8 64-bit
Windows® 7 / Windows® 7 64-bit
Windows® Vista / Windows® Vista 64-bit
Windows® XP
uATX form factor: 9.1 in x 7.2 in (23.1 cm x 18.3 cm)
viii
Specications are subject to change without notice.
Product introduction
SB_PWR
ON
Standby Power Powered Off
OFF
A55BM-E
A55BM-E Onboard LED
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.
ASUS A55BM-E
1-1
A55BM-E
1.2 Motherboard overview
Before you install the motherboard, study the conguration of your chassis to ensure that the
motherboard ts 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.
1-2
Place this side towards
the rear of the chassis
Chapter 1: Product introduction
1.2.3 Motherboard layout
A55BM-E
PCIEX16
PCIEX1_1
PCI1
F_PANEL
SPEAKER
USBPWF
COM
CLRTC
KB_USBWB
USB56 USB34
AAFP
SPDIF_OUT
ATX12V
EATXPWR
CPU_FAN CHA_FAN
BATTERY
Super
I/O
ALC
887
RTL
8111G
64Mb
BIOS
SB_PWR
23.1cm(9.1in)
AMD
®
A55
DDR3 DIMM_A1 (64bit, 240-pin module)
DDR3 DIMM_B1 (64bit, 240-pin module)
SATA3G_1 SATA3G_2 SATA3G_3
SATA3G_4 SATA3G_5 SATA3G_6
AUDIO
KBMS
LAN_USB12
USB1112
18.3cm(7.2in)
DVI_VGA
SOCKET FM2+
DIGI
+VRM
LPT
32154
7
2
6
8
9
111214151671013
1-16
1-4
1-15
1-7
1-18
1-17
1-18
1-11
1-1
1-20
1-12
1-21
1-19
1-20
1-19
Connectors/Jumpers/Slots/LEDPage
1. Keyboard and USB device wake up (3-pin KB_USBPWB) 1-13
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
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. Clear RTC RAM (3-pin CLRTC)
10. Standby power LED (SB_PWR)
11. USB 2.0 connectors (10-1 pin USB34, USB56)
12. USB device wake-up (3-pin USBPWF)
13. LPT connector (26-1 pin LPT)
14. Digital audio connector (4-1 pin SPDIF_OUT)
15. Serial port connector (10-1 pin COM)
16. Front panel audio connector (10-1 pin AAFP)
ASUS A55BM-E
1-3
1.3 Accelerated Processing Unit (APU)
A55BM-E
A55BM-E CPU socket FM2+
This motherboard comes with an FM2+ socket designed for AMD® A-series accelerated
processors with AMD® Radeon™ HD 7000/8000 series graphics.
Ensure that you use an APU designed for the FM2+ socket. The APU ts 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 Installing the APU
12
1-4
Chapter 1: Product introduction
43
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
ASUS A55BM-E
2
1-5
To uninstall the APU heatsink and fan assembly
534
12
4
3
5
1-6
Chapter 1: Product introduction
1.4 System memory
A55BM-E
A55BM-E 240-pin DDR3 DIMM sockets
DIMM_A1
DIMM_B1
1.4.1 Overview
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 gure illustrates the location of the DDR3 DIMM sockets:
ChannelSockets
Channel ADIMM_A1
Channel BDIMM_B1
ASUS A55BM-E
1-7
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