Asus F1A55-M LX R2.0 Series User manual

Motherboard
F1A55-M LX Series
• F1A55-M LX
• F1A55-M LX PLUS

ii
Copyright © 2011 ASUSTeK Computer Inc. All Rights Reserved.
No part of this manual, including the products and software described in it, may be reproduced,
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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
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
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Offer to Provide Source Code of Certain Software
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etc to this email address).
E6812
First Edition (V1)
August 2011

iii
Contents
Notices......................................................................................................... vi
Safety information ..................................................................................... vii
About this guide ....................................................................................... viii
F1A55-M LX Series specications summary ........................................... ix
Chapter 1: Product introduction
1.1 Welcome! ...................................................................................... 1-1
1.2 Package contents......................................................................... 1-1
1.3 Special features............................................................................ 1-1
1.3.1 Product highlights ........................................................... 1-1
1.3.2 ASUS Exclusive Features............................................... 1-2
1.4 Before you proceed ..................................................................... 1-4
1.5 Motherboard overview................................................................. 1-5
1.5.1 Placement direction ........................................................ 1-5
1.5.2 Screw holes .................................................................... 1-5
1.5.3 Motherboard layout ......................................................... 1-6
1.5.4 Layout contents............................................................... 1-6
1.6 Accelerated Processing Unit (APU) ........................................... 1-7
1.6.1 Installing the APU............................................................ 1-7
1.6.2 Installing the heatsink and fan ........................................ 1-9
1.7 System memory ......................................................................... 1-10
1.7.1 Overview ....................................................................... 1-10
1.7.2 Memory congurations...................................................1-11
1.7.3 Installing a DIMM .......................................................... 1-16
1.7.4 Removing a DIMM ........................................................ 1-16
1.8 Expansion slots.......................................................................... 1-17
1.8.1 Installing an expansion card ......................................... 1-17
1.8.2 Conguring an expansion card ..................................... 1-17
1.8.3 PCI slot ......................................................................... 1-17
1.8.4 PCI Express x1 slot....................................................... 1-17
1.8.5 PCI Express x16 slots................................................... 1-17
1.9 Jumpers ...................................................................................... 1-18
1.10 Connectors ................................................................................. 1-20
1.10.1 Rear panel ports ........................................................... 1-20
1.10.2 Internal connectors ....................................................... 1-21

iv
Contents
1.11 Software support........................................................................ 1-27
1.11.1 Installing an operating system ...................................... 1-27
1.11.2 Support DVD information .............................................. 1-27
Chapter 2: BIOS information
2.1 Managing and updating your BIOS ............................................ 2-1
2.1.1 ASUS Update utility ........................................................ 2-1
2.1.2 ASUS EZ Flash 2............................................................ 2-2
2.1.3 ASUS CrashFree BIOS 3 utility ...................................... 2-3
2.1.4 ASUS BIOS Updater....................................................... 2-4
2.2 BIOS setup program .................................................................... 2-7
2.3 Main menu .................................................................................. 2-11
2.3.1 System Language [English] ...........................................2-11
2.3.2 System Date [Day xx/xx/xxxx]........................................2-11
2.3.3 System Time [xx:xx:xx] ..................................................2-11
2.3.4 Security ..........................................................................2-11
2.4 Ai Tweaker menu........................................................................ 2-13
2.4.1 Ai Overclock Tuner [Auto] ............................................. 2-14
2.4.2 Memory Frequency [Auto]............................................. 2-14
2.4.3 APU Multiplier [Auto]..................................................... 2-14
2.4.4 EPU Power Saving Mode [Disabled] ............................ 2-14
2.4.5 DRAM Timing Control ................................................... 2-15
2.4.6 CPU Voltage [Offset Mode]........................................... 2-15
2.4.7 DRAM Voltage [Auto] .................................................... 2-15
2.4.8 SB 1.1V Voltage [Auto] ................................................. 2-15
2.4.9 1.1Vsb Voltage [Auto] ................................................... 2-15
2.4.10 APU1.2V Voltage [Auto]................................................ 2-16
2.4.11 VDDA Voltage [Auto]..................................................... 2-16
2.4.12 Load-line Calibration [Auto]........................................... 2-16
2.4.13 APU Spread Spectrum [Auto] ....................................... 2-16
2.5 Advanced menu ......................................................................... 2-17
2.5.1 CPU Conguration ........................................................ 2-17
2.5.2 SATA Conguration ....................................................... 2-18
2.5.3 USB Conguration ........................................................ 2-19
2.5.4 NB Conguration........................................................... 2-19

v
Contents
2.5.5 Onboard Devices Conguration.................................... 2-19
2.5.6 APM .............................................................................. 2-20
2.6 Monitor menu ............................................................................. 2-22
2.6.1 CPU Temperature / MB Temperature [xxxºC/xxxºF]...... 2-22
2.6.2 CPU / Chassis Fan Speed ............................................ 2-22
2.6.3 CPU Q-Fan Control [Enabled] ...................................... 2-22
2.6.4 CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage .. 2-23
2.6.5 Anti Surge Support [Enabled] ....................................... 2-23
2.7 Boot menu .................................................................................. 2-24
2.7.1 Bootup NumLock State [On] ......................................... 2-24
2.7.2 Full Screen Logo [Enabled]........................................... 2-24
2.7.3 Wait for ‘F1’ If Error [Enabled]....................................... 2-24
2.7.4 Option ROM Messages [Force BIOS]........................... 2-25
2.7.5 Interrupt 19 Capture [Disabled]..................................... 2-25
2.7.6 Setup Mode [EZ Mode] ................................................. 2-25
2.7.7 Boot Option Priorities .................................................... 2-25
2.7.8 Boot Override................................................................ 2-25
2.8 Tools menu ................................................................................. 2-26
2.8.1 ASUS EZ Flash 2 Utility ................................................ 2-26
2.8.2 ASUS O.C. Prole......................................................... 2-26
2.8.3 ASUS SPD Information................................................. 2-26
2.9 Exit menu.................................................................................... 2-27

vi
Notices
Federal Communications Commission Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
• This device may not cause harmful interference, and
• This device must accept any interference received including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with manufacturer’s instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
The use of shielded cables for connection of the monitor to the graphics card is required
to assure compliance with FCC regulations. Changes or modications to this unit not
expressly approved by the party responsible for compliance could void the user’s authority
to operate this equipment.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from
digital apparatus set out in the Radio Interference Regulations of the Canadian Department
of Communications.
This class B digital apparatus complies with Canadian ICES-003.
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 the detailed recycling
information in different regions.

vii
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.
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.
Safety information
Electrical safety
• To prevent electric shock hazard, disconnect the power cable from the electric outlet
before relocating the system.
• When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
• Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.
• Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.
• Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.
• If the power supply is broken, do not try to 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 that all cables are correctly connected and the power
cables are not damaged. If you detect any damage, contact your dealer immediately.
• To avoid short circuits, keep paper clips, screws, and staples away from connectors,
slots, sockets and circuitry.
• Avoid dust, humidity, and temperature extremes. Do not place the product in any area
where it may become wet.
• Place the product on a stable surface.
• If you encounter technical problems with the product, contact a qualied service
technician or your retailer.

viii
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.
NOTE: Tips and additional information to help you complete a task.
IMPORTANT: Instructions that you MUST follow to complete a task.
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.
Typography
Bold text Indicates a menu or an item to select.
Italics Used to emphasize a word or a phrase.
<Key> Keys enclosed in the less-than and greater-than sign means
that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
<Key1>+<Key2>+<Key3> If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+).
Example: <Ctrl>+<Alt>+<D>
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.

ix
F1A55-M LX Series specications summary
(continued on the next page)
APU AMD® A- & E2- series accelerated processors with AMD®
Radeon™ HD 6000 series graphics, up to 4 CPU cores, FM1
package
DirectX®11 support
AMD® Turbo Core Technology 2.0 support
* The AMD® Turbo Core Technology 2.0 support depends on the
APU types.
** Refer to www.asus.com for the AMD®CPU support list.
Chipset AMD® A55 FCH (Hudson D2)
Memory Dual-channel memory architecture
2 x 240-pin DIMM slots support maximum 32GB unbuffered
non- ECC DDR3 2250(O.C.) / 1866 / 1600 / 1333 / 1066 MHz
memory modules
* 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 (Qualied
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 6000 series graphics in the LIano
APU
Supports D-Sub with max. resolution up to 1920 x 1600 @60Hz
(16:10)
Supports Microsoft®DirectX 11
Expansion slots 2 x PCIe 2.0 x16 slots with ATI® CrossFireX™ support (blue @x16
mode, black @x4 mode)
1 x PCIe 2.0 x1 slot
1 x PCI slot
Storage / RAID AMD®A55 FCH southbridge:
- 6 x Serial ATA 3.0Gb/s connectors support RAID 0, RAID 1,
RAID 10, and JBOD congurations
LAN Realtek®8111E Gigabit LAN controller
Audio Realtek® ALC887 3-jack 8-channel High Denition Audio CODEC
- Supports Jack-Detection, Multi-Streaming, and Front Panel
Jack-Retasking

x
F1A55-M LX Series specications summary
USB AMD®A55 FCH southbridge:
- 12 x USB 2.0 ports (6 ports at the mid-board, 6 ports at
the back panel)
ASUS unique features ASUS Unique Technology
- ASUS EPU
- Protect 3.0 (F1A55-M LX PLUS only)
ASUS Power Design
- Industry leading 4+1 Phase Power Design
ASUS Exclusive Features
- AI Suite II
- AI Charger
- Anti-Surge Protection
- ASUS UEFI BIOS EZ Mode featuring user-friendly
graphics interface
ASUS Quiet Thermal Solutions
- ASUS Fanless Design: Stylish heatsink solution
- ASUS Fan Xpert
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
- ASUS MyLogo 2™
Special features 100% All high-quality conductive polymer conductors
(F1A55-M LX PLUS only)
ASUS exclusive
overclocking features
Precision Tweaker 2
- vCore: Adjustable CPU voltage at 0.003125V increment
- vDRAM: 95-step Memory voltage control, adjustable
DRAM voltage at 0.01V increment
- vFCH: 41-step Chipset voltage control, adjustable FCH
voltage at 0.01V increment
SFS (Stepless Frequency Selection):
- APU frequency tuning from 90MHz up to 300MHz at
1MHz increment
Overclocking Protection:
- ASUS C.P.R (CPU Parameter Recall)
Back Panel I/O ports 1 x PS/2 keyboard / mouse combo port
1 x COM port
1 x LPT port
1 x D-Sub output port
1 x LAN (RJ-45) port
6 x USB 2.0/1.1 ports
3 x Audio jacks
(continued on the next page)

xi
F1A55-M LX Series specications summary
Internal I/O connectors /
buttons / switches
3 x USB 2.0 connectors support additional 6 USB 2.0 ports
1 x S/PDIF output connector
1 x Front panel audio connector
6 x SATA 3.0Gb/s connectors
1 x System panel connector
1 x Internal speaker connector
1 x CPU fan connector
1 x Chassis fan connector
1 x 24-pin EATX power connector
1 x 4-pin ATX 12V power connector
BIOS 32Mb Flash ROM, UEFI BIOS, PnP, DMI 2.0, WfM 2.0,
ACPI 2.0a, SM BIOS 2.6
Accessories 2 x Serial ATA 3.0Gb/s cables
1 x I/O shield
1 x User Manual
1 x Support DVD
Support DVD Drivers
ASUS utilities
ASUS Update
Anti-Virus software (OEM version)
Form factor uATX form factor: 9.6 in x 8.4 in (24.4 cm x 21.3 cm)
*Specications are subject to change without notice.

xii

1.2 Package contents
Check your motherboard package for the following items.
Motherboard ASUS F1A55-M LX Series motherboard
Cables 2 x Serial ATA 3.0Gb/s cables
Accessories 1 x I/O shield
Application DVD ASUS motherboard Support DVD
Documentations User Manual
Chapter 1
Product introduction
1.3 Special features
1.3.1 Product highlights
1.1 Welcome!
Thank you for buying an ASUS®F1A55-M LX Series motherboard!
The motherboard delivers a host of new features and latest technologies, making it another
standout in the long line of ASUS quality motherboards!
Before you start installing the motherboard, and hardware devices on it, check the items in
your package with the list below.
AMD®A- & E2- series accelerated processors with AMD®
Radeon™ HD 6000 series graphics
This motherboard supports AMD® A- & E2- series accelerated processor
with AMD® Radeon™ HD 6000 series graphics. This revolutionary APU
(Accelerated Processing Unit) combines processing power and advanced
DirectX 11 graphics in one small, energy-efcient design to enable
accelerated performance and an industry-leading visual experience.
It features Dual-channel DDR3 memory support and accelerates data
transfer rate up to 5GT/s.
• F1A55-M LX Series motherboards include F1A55-M LX PLUS and F1A55-M LX two
models. The package contents vary from models. The layout illustrations in this user
guide are for F1A55-M LX PLUS only.
• If any of the items is damaged or missing, contact your retailer.
ASUS F1A55-M LX Series 1-1

AMD®A55 (Hudson D2) FCH Chipset
AMD® A55 FCH (Hudson D2) is designed to support up to 5GT/s interface
and PCI Express 2.0 x 16 (at x4 speed) graphics.
ATI®CrossFireX™ Technology
ATI’s CrossFireX™ boosts image quality along with rendering speed,
eliminating the need to scale down screen resolution to get high quality
images. CrossFireX™ allows higher antialiasing, anisotropic ltering,
shading, and texture settings. Adjust your display congurations,
experiment with the advanced 3D settings, and check the effects with a
real-time 3D-rendered previews within ATI Catalyst™ Control Center.
100% All High-quality Conductive Polymer Capacitors
(F1A55-M LX PLUS only)
This motherboard uses all high-quality conductive polymer capacitors for
durability, improved lifespan, and enhanced thermal capacity.
1.3.2 ASUS Exclusive Features
Ai Charger
Ai Charger is ASUS fast-charging software that supports iPod, iPhone,
and iPad.
• Check your USB mobile device if it fully supports the BC 1.1 function.
• The actual charging speed may vary with your USB device’s conditions.
Easy & Flexible
UEFI BIOS
ASUS UEFI BIOS
ASUS UEFI BIOS offers a user-friendly interface that goes beyond
traditional keyboard-only BIOS control to enable more exible and
convenient input with quick scrolling. Users can easily navigate the
UEFI BIOS with the smoothness of their operating system. Quick and
simple overclocking and setup sharing is facilitate by the F12 hotkey
BIOS snapshot feature. The exclusive EZ Mode displays frequently-
accessed setup information, while the Advanced Mode is for experienced
performance enthusiasts that demand far more intricate system control,
including detailed DRAM information.
ASUS Anti-Surge Protection
This special design protects expensive devices and the motherboard
from damage caused by power surges from switching power supply unit
(PSU).
Chapter 1: Product introduction1-2

AI Suite II
With its fast user-friendly interface, ASUS AI Suite II consolidates all the
exclusive ASUS features into one simple to use software package. It
allows you to supervise overclocking, energy management, fan speed
control, and voltage and sensor readings. This all-in-one software offers
diverse and ease to use functions, with no need to switch back and forth
between different utilities.
Fan Xpert
ASUS Fan Xpert intelligently allows you to adjust the CPU fan speed
according to different ambient temperatures caused by different climate
conditions in different geographic regions and your PC’s loading. The
built-in variety of useful proles offer exible controls of fan speed to
achieve a quiet and cool environment.
ASUS EZ Flash 2
ASUS EZ Flash 2 is a user-friendly utility that allows you to update the
BIOS without using a bootable oppy disk or an OS-based utility.
ASUS MyLogo 2™
Turn your favorite photos into 256-color boot logos to personalize your
system.
ASUS CrashFree BIOS 3
ASUS CrashFree BIOS 3 is an auto-recovery tool that allows you to
restore a corrupted BIOS le using the bundled support DVD or a USB
ash disk that contains the BIOS le.
C.P.R. (CPU Parameter Recall)
The BIOS C.P.R. feature automatically restores the CPU default settings
when the system hangs due to overclocking failure. C.P.R. eliminates the
need to open the system chassis and clear the RTC data. Simply shut
down and reboot the system, and the BIOS automatically restores the
CPU parameters to their default settings.
ErP ready
The motherboard is European Union´s Energy-related Products (ErP)
ready, and ErP requires products to meet certain energy efciency
requirements in regards to energy consumptions. This is in line with
ASUS vision of creating environment-friendly and energy-efcient
products through product design and innovation to reduce carbon
footprint of the product and thus mitigate environmental impacts.
ASUS F1A55-M LX Series 1-3

1.4 Before you proceed
Take note of the following precautions before you install motherboard components or change
any motherboard settings.
• Unplug the power cord from the wall socket before touching any component.
• Before handling components, use a grounded wrist strap or touch a safely grounded
object or a metal object, such as the power supply case, to avoid damaging them due to
static electricity.
• Hold components by the edges to avoid touching the ICs on them.
• Whenever you uninstall any component, place it on a grounded antistatic pad or in the
bag that came with the component.
• Before you install or remove any component, switch off the ATX power supply and
detach its power cord. 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
ON
Standby Power Powered Off
OFF
F1A55-M LX PLUS
F1A55-M LX PLUS Onboard LED
Chapter 1: Product introduction1-4

F1A55-M LX PLUS
1.5 Motherboard overview
1.5.1 Placement direction
When installing the motherboard, ensure that you place it into the chassis in the correct
orientation. The edge with external ports goes to the rear part of the chassis as indicated in
the image below.
DO NOT overtighten the screws! Doing so can damage the motherboard.
1.5.2 Screw holes
Place six screws into the holes indicated by circles to secure the motherboard to the chassis.
Place this side towards
the rear of the chassis.
ASUS F1A55-M LX Series 1-5

1.5.3 Motherboard layout
1.5.4 Layout contents
Connectors/Jumpers/Slots/LED Page Connectors/Jumpers/Slots/LED Page
1. Keyboard power (3-pin KBPWR) 1-19 8. Standby power LED (SB_PWR) 1-4
2. USB device wake-up (3-pin USBPW1-6, 3-pin
USBPW7-12)
1-19 9. System panel connector (10-1 pin F_PANEL) 1-24
3. ATX power connectors (24-pin EATXPWR, 4-pin
ATX12V)
1-22 10. Speaker connector (4-pin SPEAKER) 1-22
4. CPU and chassis fan connectors (4-pin
CPU_FAN and 3-pin CHA_FAN)
1-21 11. USB 2.0 connectors (10-1 pin USB78,
USB910, USB1112)
1-26
5. AMD FM1 socket 1-7 12. Digital audio connector (4-1 pin SPDIF_OUT) 1-25
6. DDR3 DIMM slots 1-10 13. Front panel audio connector (10-1 pin AAFP) 1-25
7. SATA 3.0Gb/s connectors (7-pin SATA3G_1~6) 1-23 14. Clear RTC RAM (3-pin CLRTC) 1-18
F1A55-M LX PLUS
PCIEX16_1
PCIEX16_2
PCIEX1_1
PCI1
F_PANEL
SPEAKER
CLRTC
KBPWR
USBPW1-6
USBPW7-12
AAFP
ATX12V
EATXPWR
CPU_FAN
CHA_FAN
Lithium Cell
CMOS Power
Super
I/O
ALC
887
RTL
8111E
EPU
32Mb
BIOS
SB_PWR
SPDIF_OUT
24.4cm(9.6in)
AMD®
A55
DDR3 DIMM_A1 (64bit, 240-pin module) DDR3 DIMM_B1 (64bit, 240-pin module)
SATA3G_2
SATA3G_1
SATA3G_4
SATA3G_5 SATA3G_6
SATA3G_3
AUDIO
KB_USB56
LAN1_USB12
USB34
21.3cm(8.4in)
USB1112 USB910 USB78
VGA
LPT
COM1
SOCKET FM1
52 31 644
8
3
910111213 2
7
7
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Chapter 1: Product introduction1-6

1.6 Accelerated Processing Unit (APU)
This motherboard comes with an FM1 socket designed for AMD® A- & E2- series accelerated
processors with AMD® Radeon™ HD 6000 series graphics.
1.6.1 Installing the APU
To install a APU:
1. Locate the FM1 socket on the motherboard.
2. Press the lever sideways to unlock the
socket, then lift it up to a 90°-100° angle.
Ensure that the socket lever is lifted up to a 90°-100° angle; otherwise, the APU will not t
in completely.
3. Position the APU above the socket such that the APU
corner with the gold triangle matches the socket corner
with a small triangle.
4. Carefully insert the APU into the socket until it ts in place.
The APU ts only in one correct orientation.
DO NOT force the APU into the socket to
prevent bending the pins and damaging the
APU!
Ensure that you use a APU designed for the FM1 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!
Gold triangle
Small triangle
Socket lever
F1A55-M LX PLUS
F1A55-M LX PLUS CPU socket FM1
ASUS F1A55-M LX Series 1-7

5. When the APU is in place, push down the socket
lever to secure the APU. The lever clicks on the side
tab to indicate that it is locked.
6. Install a APU heatsink and fan following the
instructions that comes with the heatsink package.
You can also refer to section 1.6.2 Installing
heatsink and fan for instructions.
7. Connect the CPU fan cable to the CPU_FAN connector on the motherboard.
DO NOT forget to connect the CPU fan connector! Hardware monitoring errors can occur if
you fail to plug this connector.
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
F1A55-M LX PLUS
F1A55-M LX PLUS CPU fan connecto
r
Chapter 1: Product introduction1-8