Asus A55BM-K User Manual

A55BM-K

Motherboard

E8809
First Edition

November 2013

Copyright © 2013 ASUSTeK COMPUTER INC. All Rights Reserved.

No part of this manual, including the products and software described in it, may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any
means, except documentation kept by the purchaser for backup purposes, without the express written
permission of ASUSTeK COMPUTER INC. (“ASUS”).

Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the

product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS

OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS
DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),
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DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.

SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE,
AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO
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Products and corporate names appearing in this manual may or may not be registered trademarks or

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owners’ benet, without intent to infringe.

Offer to Provide Source Code of Certain Software

This product contains copyrighted software that is licensed under the General Public License (“GPL”),
under the Lesser General Public License Version (“LGPL”) and/or other Free Open Source Software
Licenses. Such software in this product is distributed without any warranty to the extent permitted by the
applicable law. Copies of these licenses are included in this product.

Where the applicable license entitles you to the source code of such software and/or other additional data,
you may obtain it for a period of three years after our last shipment of the product, either

(1) for free by downloading it from http://support.asus.com/download
or
(2) for the cost of reproduction and shipment, which is dependent on the preferred carrier and the location

where you want to have it shipped to, by sending a request to:

ASUSTeK Computer Inc.
Legal Compliance Dept.
15 Li Te Rd.,
Beitou, Taipei 112
Taiwan

In your request please provide the name, model number and version, as stated in the About Box of the
product for which you wish to obtain the corresponding source code and your contact details so that we
can coordinate the terms and cost of shipment with you.

The source code will be distributed WITHOUT ANY WARRANTY and licensed under the same license as
the corresponding binary/object code.

This offer is valid to anyone in receipt of this information.
ASUSTeK is eager to duly provide complete source code as required under various Free Open Source

Software licenses. If however you encounter any problems in obtaining the full corresponding source
code we would be much obliged if you give us a notication to the email address [e-mail], stating
the product and describing the problem (please DO NOT send large attachments such as source code
archives, etc. to this email address).

ii

Contents

Safety information ...................................................................................................... iv

About this guide ......................................................................................................... iv

Package contents ....................................................................................................... vi

A55BM-K specications summary ...........................................................................vi

Product introduction

1.1 Before you proceed ...................................................................................... 1-1

1.2 Motherboard overview .................................................................................

1.3 Accelerated Processing Unit (APU) ............................................................

1.4 System memory ............................................................................................

1.5 Expansion slots ..........................................................................................

1.6 Jumpers

1.7 Connectors ..................................................................................................

1.8 Software support ........................................................................................

BIOS information

2.1 Managing and updating your BIOS .............................................................2-1

2.2 BIOS setup program .....................................................................................

2.3 My Favorites

2.4 Main menu ...................................................................................................

2.5 Ai Tweaker menu ........................................................................................

2.6 Advanced menu ..........................................................................................

2.7 Monitor menu ..............................................................................................

2.8 Boot menu ...................................................................................................

2.9 Tools menu ..................................................................................................

2.10 Exit menu ....................................................................................................

....................................................................................................... 1-11

.................................................................................................. 2-9

1-2

1-4

1-7

1-10

1-13

1-21

2-5

2-10

2-11

2-12

2-12

2-13

2-14

2-14

Appendices

Notices ..................................................................................................................... A-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 qualied 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 qualied service

•
technician or your retailer.

About this guide

This user guide contains the information you need when installing and conguring 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 text Indicates 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.

Motherboard ASUS A55BM-K motherboard

Cables 2 x Serial ATA 3.0 Gb/s cables

Accessories 1 x I/O Shield

Application DVD Support DVD

Documentation User Guide

If any of the above items is damaged or missing, contact your retailer.

A55BM-K specications 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

• Refer to www.asus.com for the AMD® APU support list.

Chipset AMD® A55 FCH (Hudson D2)

Memory 2 x DDR3 DIMM, max. 32GB, DDR3 2133* / 1866 / 1600 / 1333 MHz, non-

Graphics Integrated AMD® Radeon™ HD 7000 / 8000 Series Graphics in the A-

Expansion slots 1 x PCIe 3.0/2.0 x16 slot*

ECC un-buffered memory

Dual-channel memory architecture

Supports AMD Memory Prole (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 (Qualied 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 and D-Sub ports

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

• 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

• Only FM2+ processors support PCIe 3.0.

(continued on the next page)

vi

A55BM-K specications summary

Storage / RAID AMD® A55 FCH:

- 4 x Serial ATA 3.0Gb/s connectors (dark brown) support RAID 0, RAID 1,

RAID 10, and JBOD congurations

LAN

Audio Realtek

USB AMD® A55 FCH:

ASUS unique
features

Back Panel I/O
ports

Realtek® 8111G PCIe Gigabit LAN controller

®

ALC887-VD 8-channel High Denition 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 ports (4 ports at the back panel, 4 ports at mid-board)

ASUS DIGI+ VRM

- 3+1 Phase digital power design

ASUS Enhanced DRAM Overcurrent Protection

- Short circuit damage protection

ASUS ESD Guards

- Strong ESD protection for extended component lifespan

ASUS Stainless Steel Back I/O

- 3x More durable corrosion-resistant coating

ASUS Exclusive Features

- ASUS EPU

- ASUS Network iControl

- ASUS AI Charger

- ASUS AI Suite III

- 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

- ASUS CrashFree BIOS 3

- ASUS EZ Flash 2

- ASUS MyLogo 2™

1 x PS/2 mouse port (green)

1 x PS/2 keyboard port (purple)

1 x DVI-D port

1 x VGA output port

1 x LAN (RJ-45) port

4 x USB 2.0/1.1 ports

8-channel audio I/O ports (3-jack)

(continued on the next page)

vii

A55BM-K specications summary

Internal I/O
connectors

BIOS 64 Mb Flash ROM, UEFI AMI BIOS, PnP, DMI 2.0, WfM 2.0, SM BIOS 2.7,

Support DVD Drivers

Operating System
Support

Form factor

2 x USB 2.0 connectors support additional 4 USB 2.0 ports

1 x COM connector

4 x SATA 3.0Gb/s 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

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

ASUS Update

ASUS utilities

Anti-Virus software (OEM version)

Windows® 8.1 / 8.1 64bit

Windows® 8 / 8 64bit

Windows® 7 / 7 64bit

Windows® Vista / Vista 64-bit

Windows® XP

uATX form factor: 8.9 in x 7.2 in (22.6 cm x 18.3 cm)

viii

Specications are subject to change without notice.

Product introduction

SB_PWR

ON

Standby Power

Powered Off

OFF

A55BM-K

A55BM-K 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-K

1-1

A55BM-K

1.2 Motherboard overview

Before you install the motherboard, study the conguration 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-K

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

ASM
1042

64Mb

BIOS

SB_PWR

22.6cm(8.9in)

AMD

®

A55

DDR3 DIMM_A1 (64bit, 240-pin module)

DDR3 DIMM_B1 (64bit, 240-pin module)

SATA3G_1 SATA3G_2 SATA3G_3

SATA3G_4

AUDIO

KBMS

LAN_USB12

USB1112

18.3cm(7.2in)

DVI_VGA

SOCKET FM2+

DIGI

+VRM

321 54

2

6

8

7

91011121315 14 7

Connectors/Jumpers/Slots/LED Page

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_1~4)

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)

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)

ASUS A55BM-K

1-16

1-4

1-15

1-7

1-18

1-17

1-18

1-20

1-11

1-12

1-17

1-20

1-1

1-19

1-3

1.3 Accelerated Processing Unit (APU)

A55BM-K

A55BM-K 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

1 2

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-K

2

1-5

To uninstall the APU heatsink and fan assembly

53 4

1 2

4

3

5

1-6

Chapter 1: Product introduction

1.4 System memory

A55BM-K

A55BM-K 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:

Channel Sockets

Channel A DIMM_A1

Channel B DIMM_B1

ASUS A55BM-K

1-7

1.4.2 Memory congurations

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 conguration. 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
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 efcient memory cooling system to support a full

memory load (2 DIMMs) or overclocking condition.

• Refer to

www.asus.com for the latest Memory QVL (Qualied Vendors List).

®

OS, when you install 4GB

1-8

Chapter 1: Product introduction

1.4.3 Installing a DIMM

1

2

3

To remove a DIMM

B

ASUS A55BM-K

A

1-9

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. Remove the system unit cover (if your motherboard is already installed in a chassis).

3. Remove the bracket opposite the slot that you intend to use. Keep the screw for later
use.

4. Align the card connector with the slot and press rmly until the card is completely

seated on the slot.

5. Secure the card to the chassis with the screw you removed earlier.

6. Replace the system cover.

1.5.2 Conguring an expansion card

After installing the expansion card, congure it by adjusting the software settings.

1. Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for
information on BIOS setup.

2. Assign an IRQ to the card.

3. Install the software drivers for the expansion card.

When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that

the cards do not need IRQ assignments. Otherwise, conicts 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 specications.

1-10

Chapter 1: Product introduction

1.5.4 PCI Express x1 slot

A55BM-K

A55BM-K Clear RTC RAM

1 2

2 3

Normal

(Default)

Clear RTC

CLRTC

This motherboard supports PCI Express 2.0 x1 network cards, SCSI cards, and other cards

that comply with the PCI Express specications.

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 specications.

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 – – shared – - – – –

HD audio shared – – – – – – –

SATA controller – – – shared – – – –

On Chip USB EHCI 1/2/3 – shared – – – – – –

On Chip USB OHCI 1/2/3/4 – – 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.

ASUS A55BM-K

1-11

To erase the RTC RAM:

A55BM-K

A55BM-K USB device wake up

21

2 3

+5V

(Default)

+5VSB

USBPWF

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.

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).

• 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)

A55BM-K

A55BM-K Keyboard and USB device wake up

1 2

2 3

+5V

+5VSB

(Default)

KB_USBPWB

4 53

67

1

9

2

8

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.

1.7 Connectors

1.7.1 Rear panel connectors

1. PS/2 Mouse port (green). This port is for a PS/2 mouse.

Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other

2.
VGA-compatible devices.

3. LAN (RJ-45) port.

This port allows Gigabit connection to a Local Area Network (LAN)

through a network hub.

ASUS A55BM-K

1-13

LAN port LED indications

Activity/Link LED Speed LED
Status Description Status Description

Off No link OFF 10Mbps connection
Orange Linked ORANGE 100Mbps connection
Orange (Blinking) Data activity GREEN 1Gbps connection
Orange (Blinking

then steady)

Ready to wake up
from S5 mode

ACT/LINK

LED

LAN port

SPEED

4. Line In port (light blue). This port connects to the tape, CD, DVD player, or other

audio sources.

5. Line Out port (lime).

This port connects to a headphone or a speaker. In the 4.1, 5.1,

and 7.1-channel congurations, the function of this port becomes Front Speaker Out.

6. Microphone port (pink).

Refer to the audio conguration table below for the function of the audio ports in 2.1, 4.1,

5.1, or 7.1-channel conguration.

This port connects to a microphone.

Audio 2.1, 4.1, 5.1, or 7.1-channel conguration

LED

output.

Headset 2.1-

channel

4.1-channel 5.1-channel 7.1-channel

Port

Light Blue (Rear panel) Line In Rear Speaker Out Rear Speaker Out Rear Speaker Out

Lime (Rear panel) Line Out Front Speaker Out Front Speaker Out Front Speaker Out

Pink (Rear panel) Mic In Mic In Bass/Center Bass/Center

Lime (Front panel) — — — Side Speaker Out

To congure a 7.1-channel audio output:

Use a chassis with HD audio module in the front panel to support a 7.1-channel audio

7. USB 2.0 ports. These 4-pin Universal Serial Bus (USB) ports are for USB 2.0/1.1

devices.

8. 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.

9. PS/2 Keyboard port (purple).

This port is for a PS/2 keyboard.

1-14

Chapter 1: Product introduction

1.7.2 Internal connectors

A55BM-K

A55BM-K Fan connectors

CPU_FAN

CPU FAN PWM

CPU FAN IN

CPU FAN PWR

GND

CHA FAN PWM

CHA FAN IN

CHA FAN PWR

GND

CHA_FAN

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.

DO NOT forget to connect the fan cables to the fan connectors. Insufcient air ow 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.

ASUS A55BM-K

1-15

2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)

A55BM-K

A55BM-K ATX power connectors

EATXPWR

PIN 1

GND
+5 Volts
+5 Volts
+5 Volts

-5 Volts
GND
GND
GND
PSON#
GND

-12 Volts
+3 Volts

+3 Volts
+12 Volts
+12 Volts

+5V Standby

Power OK

GND

+5 Volts

GND

+5 Volts

GND
+3 Volts
+3 Volts

ATX12V

PIN 1

+12V DC

+12V DC

GND

GND

These connectors are for an ATX power supply. The plugs from the power supply are

designed to t these connectors in only one orientation. Find the proper orientation and
push down rmly until the connectors completely t.

•

We recommend that you use an ATX 12V Specication 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 conguring 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.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.

1-16

Chapter 1: Product introduction

3. Serial ATA 3.0 Gb/s connectors (7-pin SATA3G 1~4)

SATA3G_2

GND

RSATA_TXP1

RSATA_TXN1

GND

RSATA_RXN1

RSATA_RXP1

GND

SATA3G_1

GND

RSATA_TXP2

RSATA_TXN2

GND

RSATA_RXN2

RSATA_RXP2

GND

SATA3G_3

GND

RSATA_TXP3

RSATA_TXN3

GND

RSATA_RXN3

RSATA_RXP3

GND

SATA3G_4

GND
RSATA_RXP4
RSATA_RXN4
GND
RSATA_TXN4
RSATA_TXP4
GND

A55BM-K

A55BM-K SATA 3.0Gb/s connectors

SPDIF_OUT

+5V

SPDIFOUT

GND

A55BM-K

A55BM-K Digital audio connector

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 conguration through the onboard controller.

• 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].

4. Digital audio connector (4-1 pin SPDIF_OUT)

This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port.

The S/PDIF module is purchased separately.

ASUS A55BM-K

1-17

5. System panel connector (10-1 pin F_PANEL)

A55BM-K

PIN 1

PWR BTN

PWR_LED+

PWR_LED-

PWR

GND

HDD_LED+

HDD_LED-

Ground

HWRST#

(NC)

F_PANEL

+PWR LED

+HDD_LED RESET

A55BM-K System panel connector

A55BM-K

A55BM-K Speaker Out Connector

+5V

GND

GND

Speaker Out

SPEAKER

PIN 1

This connector supports several chassis-mounted functions.

• 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 ashes 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.

6. 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.

1-18

Chapter 1: Product introduction

7. Front panel audio connector (10-1 pin AAFP)

A55BM-K

A55BM-K Front panel audio connector

AAFP

PIN 1

AGNDNCSENSE1_RETUR

SENSE2_RETUR

PORT1 L

PORT1 R

PORT2 R

SENSE_SEND

PORT2 L

HD-audio-compliant

pin definition

PIN 1

AGNDNCNC

NC

MIC2

MICPWR

Line out_R

NC

Line out_L

Legacy AC’97

compliant definition

This connector is for a chassis-mounted front panel audio I/O module that supports

either High Denition Audio or AC`97 audio standard. Connect one end of the front

panel audio I/O module cable to this connector.

• We recommend that you connect a high-denition front panel audio module to this
connector to avail of the motherboard high-denition audio capability.

• If you want to connect a high denition 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.

ASUS A55BM-K

1-19

8. USB 2.0 connectors (10-1 pin USB34, USB56)

A55BM-K

A55BM-K USB2.0 connectors

PIN 1

USB+5V

USB_P5-

USB_P5+

GND

NC

USB+5V

USB_P6-

USB_P6+

GND

USB56 USB34

PIN 1

USB+5V

USB_P3-

USB_P3+

GND

NC

USB+5V

USB_P4-

USB_P4+

GND

A55BM-K

A55BM-K Serial port connectors

PIN 1

COM

DCD

TXD

GND

RTS

RI

RXD

DTR

DSR

CTS

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 specication that supports up to

480Mbps connection speed.

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.

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
the drivers for better compatibility and system stability.

• Only motherboards installed with an AMD Trinity APU support Windows
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
ASUS website at www.asus.com for updates.

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.

®

XP Service Pack 3 or later versions before installing

®

Vista / 64bit

The following screen is for reference only.

Click an item to install

If Autorun is NOT enabled in your computer, browse the contents of the Support DVD to

locate the le ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run

the DVD.

ASUS A55BM-K

Click an icon to display
Support DVD/motherboard
information

1-21

1-22

Chapter 1: Product introduction

BIOS information

2

2.1 Managing and updating your BIOS

Save a copy of the original motherboard BIOS le to a USB ash 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.

Click to automatically

update your

motherboard’s

driver, software and

rmware

EZ Update requires an Internet connection either through a network or an ISP (Internet
Service Provider).

ASUS A55BM-K

Click to nd and

select the BIOS

from le

Click to select a

boot logo

Click to update
the BIOS

2-1

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 le from the ASUS website at

www.asus.com.

To update the BIOS using EZ Flash 2:

1. Insert the USB ash disk that contains the latest BIOS le to the USB port.

2. Enter the

ASUS EZ Flash 2 Utility and press <Enter> to enable it.

3. Press <Tab> to switch to the

4. Press the Up/Down arrow keys to nd the USB ash disk that contains the latest BIOS,

and then press <Enter>.

5. Press <Tab> to switch to the

6. Press the Up/Down arrow keys to nd the BIOS le, and then press <Enter> to perform

the BIOS update process. Reboot the system when the update process is done.

Advanced Mode of the BIOS setup program. Go to the Tool menu to select

Drive eld.

Folder Info eld.

• This function supports USB ash 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 le

when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS

le using the motherboard support DVD or a USB ash drive that contains the updated BIOS
le.

• Before using this utility, rename the BIOS le in the removable device into

A55BMK.CAP.

• The BIOS le in the support DVD may not be the latest version. Download the latest
BIOS le 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 ash drive that contains the
BIOS le to the USB port.

3. The utility automatically checks the devices for the BIOS le. When found, the utility
reads the BIOS le 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 le 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 ash drive in FAT32/16 format and

single partition.

2. Download the latest BIOS le and BIOS Updater from the ASUS website at
http://support.asus.com and save them on the USB ash drive.

NTFS is not supported under DOS environment. Do not save the BIOS le and BIOS
Updater to a hard disk drive or USB ash drive in NTFS format.

3. Turn off the computer and disconnect all SATA hard disk drives (optional).

ASUS A55BM-K

2-3

Booting the system in DOS environment

1. Insert the DOS-bootable USB ash drive with the latest BIOS le 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 ash drive as the boot device. The DOS screen appears.

Updating the BIOS le

To update the BIOS le 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

A55BM-K

2-4

BOARD:
VER: 0305
DATE: 11/14/2013

A:\

A55BMK.CAP 8390656 2013-11-14 17:30:48

Chapter 2: Getting started

3. Press <Tab> to switch between screen elds and use the <Up/Down/Home/End> keys
to select the BIOS le and press <Enter>. BIOS Updater checks the selected BIOS le
and prompts you to conrm 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. Refer to section 2.10
Exit menu for details.

• Ensure to connect all SATA hard disk drives after updating the BIOS le if you have

disconnected them.

2.2 BIOS setup program

Use the BIOS Setup program to update the BIOS or congure 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 rst two options.

ASUS A55BM-K

2-5

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.

• Visit the ASUS website at
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. See section 2.10 Exit Menu
for details.

• 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.

www.asus.com to download the latest BIOS le for this

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.

2-6

The default screen for entering the BIOS setup program can be changed.

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

Selects the
boot device
priority

Selects the Advanced
mode functions

Power Saving
mode

ASUS A55BM-K

Displays the
Advanced mode
menus

SATA information

Normal mode

Loads optimized default

Selects the boot
device priority

Displays the system
properties of the
selected mode on the
right hand side

• 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

Advanced Mode

The Advanced Mode provides advanced options for experienced end-users to congure the
BIOS settings. The gure below shows an example of the Advanced Mode. Refer to the
following sections for the detailed congurations.

To access the EZ Mode, click Exit, then select ASUS EZ Mode or press F7.

Back button

Menu items

Menu bar

Conguration elds

Submenu item

Menu bar

The menu bar on top of the screen has the following main items:

Pop-up window

Navigation keys

General help

Last modied

settings

Quick note

My Favorites For saving the frequently-used system settings and conguration
Main For changing the basic system conguration

Ai Tweaker For changing the overclocking settings

Advanced For changing the advanced system settings

Monitor

For displaying the system temperature, power status, and changing the
fan settings

Boot For changing the system boot conguration

Tool For conguring options for special functions
Exit 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-congurable items such as language and boot device order

• Conguration items such as Memory SPD Information, system time and date

ASUS A55BM-K

2-9

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.

2-10

• 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.

Chapter 2: Getting started

2.5 Ai Tweaker menu

The Ai Tweaker menu items allow you to congure overclocking-related items.

Be cautious when changing the settings of the Ai Tweaker menu items. Incorrect eld

values can cause the system to malfunction.

The conguration options for this section vary depending on the CPU and DIMM model you

installed on the motherboard.

Scroll down to display the other items.

ASUS A55BM-K

2-11

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 eld 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

2.8 Boot menu

The Boot menu items allow you to change the system boot options.

Scroll down to display the other items.

ASUS A55BM-K

2-13

2.9 Tools menu

The Tools menu items allow you to congure 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.

•

A55BM-K

The use of shielded cables for connection of the monitor to the graphics card is required

to assure compliance with FCC regulations. Changes or modications to this unit not
expressly approved by the party responsible for compliance could void the user’s authority

to operate this equipment.

A-1

IC: Canadian Compliance Statement

Complies with the Canadian ICES-003 Class B specications. 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
ASUS REACH website at http://csr.asus.com/english/REACH.htm.

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
materials. Please go to http://csr.asus.com/english/Takeback.htm for detailed recycling
information in different regions.

A55BM-K

A-3

ASUS contact information

ASUSTeK COMPUTER INC.

Address 15 Li-Te Road, Peitou, Taipei, Taiwan 11259
Telephone [phone]
Fax [phone]
E-mail [e-mail]
Web site http://www.asus.com.tw

Technical Support

Telephone [phone]
Fax [phone], ext. 9101#
Online support

ASUS COMPUTER INTERNATIONAL (America)

Address 800 Corporate Way, Fremont, CA 94539, USA
Telephone [phone]
Fax [phone]
Web site http://usa.asus.com

Technical Support

Telephone [phone]
General support [phone]
Online support http://support.asus.com/techserv/techserv.aspx

ASUS COMPUTER GmbH (Germany and Austria)

Address Harkort Str. 21-23, D-40880 Ratingen, Germany
Fax [phone]
Web site http://www.asus.com/de
Online contact http://eu-rma.asus.com/sales

http://support.asus.com/techserv/techserv.aspx

Technical Support

Telephone [phone]
Support Fax [phone]
Online support http://support.asus.com/techserv/techserv.aspx

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Appendices

DECLARATION OF CONFORMITY

Per FCC Part 2 Section 2. 1077(a)

Responsi ble Party Name:

Asus Computer International

Address: 800 Corporate Way, Fremont

, CA 94539.

Phone/Fax No: [phone]/[phone]

hereby declares that the product

Product Name : Motherboard

Model Number : A55BM-K

Conforms to the following specifications:

FCC Part 15, Subpart B, Unintentional Radiators

Supplementary Information:

This device complies with part 15 of the FCC Rules. Operation is subject to the

following two conditions: (1) This device may not cause harmful interference,

and (2) this device must accept any interference received, including interference

that may cause undesired operation.

Representative Person’s Name : Steve Chang / President

Signature :

Date : Nov. 25, 2013

Ver. 120601

EC Declaration of Conformity

We, the undersigned,

Manufacturer:

ASUSTeK COMPUTER INC.

Address, City:

4F, No. 150, LI-TE Rd., PEITOU, TAIPEI 112, TAIWAN

Country:

TAIWAN

Authorized representative in Europe:

ASUS COMPUTER GmbH

Address, City:

HARKORT STR. 21-23, 40880 RATINGEN

Country:

GERMANY

declare the following apparatus:

Product name :

Motherboard

Model name : A55BM-K

conform with the essential requirements of the following directives:

2004/108/EC-EMC Directive

EN 55022:2010+AC:2011

EN 61000-3-2:2006+A2:2009

EN 55013:2001+A1:2003+A2:2006

EN 55024:2010

EN 61000-3-3:2008

EN 55020:2007+A11:2011

1999/5/EC-R &TTE Directive

EN 300 328 V1.7.1(2006-10)

EN 300 440-1 V1.6.1(2010-08)

EN 300 440-2 V1.4.1(2010-08)

EN 301 511 V9.0.2(2003-03)

EN 301 908-1 V5.2.1(2011-05)

EN 301 908-2 V5.2.1(2011-07)

EN 301 893 V1.6.1(2011-11)

EN 302 544-2 V1.1.1(2009-01)

EN 302 623 V1.1.1(2009-01)

EN 50360:2001

EN 62479:2010

EN 50385:2002

EN 62311:2008

EN 301 489-1 V1.9.2(2011-09)

EN 301 489-3 V1.4.1(2002-08)

EN 301 489-4 V1.4.1(2009-05)

EN 301 489-7 V1.3.1(2005-11)

EN 301 489-9 V1.4.1(2007-11)

EN 301 489-17 V2.2.1(2012-09)

EN 301 489-24 V1.5.1(2010-09)

EN 302 326-2 V1.2.2(2007-06)

EN 302 326-3 V1.3.1(2007-09)

EN 301 357-2 V1.4.1(2008-11)

EN 302 291-1 V1.1.1(2005-07)

EN 302 291-2 V1.1.1(2005-07)

2006/95/EC-LVD Directive

EN 60950-1 / A12:2011 EN 60065:2002 / A12:2011

2009/125/EC-ErP Directive

Regulation (EC) No. 1275/2008

Regulation (EC) No. 642/2009

Regulation (EC) No. 278/2009

Regulation (EC) No. 617/2013

2011/65/EU-RoHS Directive

Ver. 130816

CE marking

Declaration Date: 25/11/2013

Year to begin affixing CE marking:2013

Position : CEO

Name :

Jerry Shen

Signature :

__________

(EC conformity marking)

A55BM-K

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