Asus F1A55-M LK User Manual
F1A55-M LK R2.0
Motherboard
E8029
First Edition (V1)
January 2013
Copyright © 2012 ASUSTeK COMPUTER INC. All Rights Reserved.
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ii
Contents
Safety information ...................................................................................... vi
About this guide ......................................................................................... vi
F1A55-M LK R2.0 specications summary ............................................ viii
Chapter 1 Product introduction
1.1 Welcome! ...................................................................................... 1-1
1.2 Package contents .........................................................................
1.3 Special features ............................................................................
1.3.1 Product highlights ...........................................................
1.3.2 ASUS Hybrid DIGI+ VRM ...............................................
1.3.3 ASUS Exclusive Features ...............................................
1.4 Before you proceed .....................................................................
1.5 Motherboard overview .................................................................
1.5.1 Placement direction ........................................................
1.5.2 Screw holes ....................................................................
1.5.3 Motherboard layout .........................................................
1.5.4 Layout contents ...............................................................
1.6 Accelerated Processing Unit (APU) ...........................................
1.6.1 Installing the APU ............................................................
1.6.2 Installing the heatsink and fan ......................................
1.7 System memory .........................................................................
1.7.1 Overview ........................................................................
1.7.2 Memory congurations ..................................................
1.7.3 Installing a DIMM ..........................................................
1.7.4 Removing a DIMM ........................................................
1.8 Expansion slots ..........................................................................
1.8.1 Installing an expansion card .........................................
1.8.2 Conguring an expansion card .....................................
1.8.3 PCI slot .........................................................................
1.8.4 PCI Express x1 slot .......................................................
1.8.5 PCI Express x16 slot .....................................................
1.9 Jumpers ......................................................................................
1.10 Connectors .................................................................................
1.10.1 Rear panel ports ...........................................................
1.10.2 Internal connectors .......................................................
1-1
1-1
1-1
1-2
1-3
1-5
1-6
1-6
1-6
1-7
1-7
1-8
1-8
1-10
1-11
1-11
1-12
1-16
1-16
1-17
1-17
1-17
1-17
1-17
1-17
1-18
1-20
1-20
1-21
iii
Contents
1.11 Software support ........................................................................ 1-27
1.11.1 Installing an operating system ......................................
1.11.2 Support DVD information ..............................................
Chapter 2 BIOS information
2.1 Managing and updating your BIOS ............................................ 2-1
2.1.1 ASUS Update utility ........................................................
2.1.2 ASUS EZ Flash 2 ............................................................
2.1.3 ASUS CrashFree BIOS 3 utility ......................................
2.1.4 ASUS BIOS Updater .......................................................
2.2 BIOS setup program ....................................................................
2.3 Main menu ..................................................................................
2.3.1 System Language [English] ..........................................
2.3.2 System Date [Day xx/xx/xxxx] .......................................
2.3.3 System Time [xx:xx:xx] .................................................
2.3.4 Security .........................................................................
2.4 Ai Tweaker menu ........................................................................
2.4.1 Ai Overclock Tuner [Auto] .............................................
2.4.2 Memory Frequency [Auto] .............................................
2.4.3 APU Multiplier [Auto] .....................................................
2.4.4 EPU Power Saving Mode [Disabled] ............................
2.4.5 OC Tuner ......................................................................
2.4.6 DRAM Timing Control ...................................................
2.4.7 Hybrid DIGI+ VRM ........................................................
2.4.8 CPU Voltage [Offset Mode] ...........................................
2.4.9 DRAM Voltage [Auto] ....................................................
2.4.10 APU Spread Spectrum [Auto] .......................................
2.5 Advanced menu .........................................................................
2.5.1 CPU Conguration ........................................................
2.5.2 SATA Conguration .......................................................
2.5.3 USB Conguration ........................................................
2.5.4 NB Conguration ...........................................................
2.5.5 Onboard Devices Conguration ....................................
2.5.6 APM ..............................................................................
2.5.7 Network Stack ...............................................................
1-27
1-27
2-1
2-2
2-3
2-4
2-6
2-10
2-10
2-10
2-10
2-10
2-12
2-13
2-13
2-13
2-13
2-13
2-14
2-14
2-14
2-15
2-15
2-16
2-16
2-17
2-17
2-18
2-18
2-19
2-19
iv
Contents
2.6 Monitor menu ............................................................................. 2-20
2.6.1 CPU Temperature / MB Temperature
2.6.2 CPU / Chassis
2.6.3 CPU Q-Fan Control [Enabled] ......................................
2.6.4 CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage ..
2.6.5 Anti Surge Support [Enabled] .......................................
2.7 Boot menu ..................................................................................
2.7.1 Bootup NumLock State [On] .........................................
2.7.2 Full Screen Logo [Enabled] ...........................................
2.7.3 Wait for ‘F1’ If Error [Enabled] .......................................
2.7.4 Option ROM Messages [Force BIOS] ...........................
2.7.5 Setup Mode [EZ Mode] .................................................
2.7.6 UEFI/Legacy Boot [Enabled both UEFI and Legacy] ....
2.7.7 PCI ROM Priority [Legacy ROM] ..................................
2.7.8 Boot Option Priorities ....................................................
2.7.9 Boot Override ................................................................
2.8 Tools menu .................................................................................
2.8.1 ASUS EZ Flash 2 Utility ................................................
2.8.2 ASUS O.C. Prole .........................................................
2.8.3 ASUS SPD Information .................................................
2.9 Exit menu ....................................................................................
Fan Speed ............................................ 2-20
[xxxºC/xxxºF] ...... 2-20
2-20
2-21
2-21
2-22
2-22
2-22
2-22
2-23
2-23
2-23
2-23
2-23
2-23
2-24
2-24
2-24
2-24
2-25
Appendices
Notices .......................................................................................................A-1
v
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 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 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 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.
vi
Conventions used in this guide
To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.
DANGER/WARNING: Information to prevent injury to yourself when trying to
complete a task.
CAUTION: Information to prevent damage to the components when trying to
complete a task.
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
Where to 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>
vii
F1A55-M LK R2.0 specications summary
APU AMD® A- & E2- series accelerated processors with AMD®
Chipset AMD® A55 FCH (Hudson D2)
Memory 2 x DDR3 DIMMs, max. 32GB, DDR3 1866/1600/1333/1066 MHz,
Graphics Integrated AMD® Radeon™ HD 6000 series graphics in the LIano
Multi-GPU
support
Expansion slots 1 x PCI Express 2.0 x16 slot
Storage / RAID AMD® A55 FCH:
LAN Qualcomm Atheros® 8161 Gigabit LAN controller
Audio Realtek® ALC887 8-channel* High Denition Audio CODEC
USB AMD® A55 FCH:
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.
non-ECC, unbuffered memory
Dual-channel memory architecture
* 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® 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.
APU
Supports DVI with max. resolution of 1920 x 1200 @60Hz
Supports D-Sub with max. resolution of 1920 x 1600 @60Hz
Supports Microsoft® DirectX 11
Supports LucidLogix® Virtu MVP Technology
* LucidLogix Virtu® MVP supports Windows® 7 operating systems.
1 x PCI Express 2.0 x1 slot
1 x PCI slot
- 4 x Serial ATA 3.0Gb/s connectors support RAID 0, RAID 1,
RAID 10, and JBOD congurations
* Use a chassis with HD audio module in the front panel to
support an 8-channel audio output.
- 8 x USB 2.0/1.1 ports (4 ports at the mid-board, 4 ports at
the back panel)
viii
(continued on the next page)
F1A55-M LK R2.0 specications summary
ASUS unique features ASUS Hybrid DIGI+ VRM:
Back panel I/O ports 1 x PS/2 Mouse port (green)
Internal I/O
connectors
BIOS 64Mb Flash ROM, UEFI BIOS, PnP, DMI v2.0, WfM 2.0, ACPI
Accessories 2 x Serial ATA 3.0Gb/s cables
Support DVD Drivers
Form factor uATX form factor: 8.9 in x 7.3 in (22.6 cm x 18.6 cm)
- ASUS 3+1 Phase Power Design
ASUS Exclusive Features
- Network iControl* featuring instant network bandwidth
domination for top network program in use
- ASUS EPU
- ASUS AI Suite II
- Anti-Surge Protection
- ASUS UEFI BIOS EZ Mode featuring friendly graphics
user interface
- ASUS Fan Xpert
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
- ASUS MyLogo 2™
* The Network iControl feature does not support Windows®
XP/Vista operating systems.
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
3 x Audio jacks
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1
ports
1 x Front panel audio connector
4 x SATA 3.0Gb/s connectors
1 x COM connector
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
2.0a, SM BIOS v2.6
1 x I/O shield
1 x User Manual
1 x Support DVD
ASUS utilities
ASUS Update
Anti-Virus software (OEM version)
* Specications are subject to change without notice.
ix
x
Chapter 1
Product introduction
1.1 Welcome!
Thank you for buying an ASUS® F1A55-M LK R2.0 motherboard!
The motherboard delivers a host of new features and latest technologies, making it another
standout in the long line of ASUS quality motherboards!
Before you start installing the motherboard, and hardware devices on it, check the items in
your package with the list below.
1.2 Package contents
Check your motherboard package for the following items.
Motherboard ASUS F1A55-M LK R2.0 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
If any of the items is damaged or missing, contact your retailer.
1.3 Special features
1.3.1 Product highlights
AMD® A- & E2- series accelerated processors with AMD®
ASUS F1A55-M LK R2.0 1-1
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-efcient 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.
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.
8-channel high denition audio
The onboard 8-channel HD audio (High Denition Audio, previously
codenamed Azalia) CODEC enables high-quality 192KHz/24-bit audio
output and jack-detect feature that automatically detects and identies
what types of peripherals are plugged into the audio I/O jacks and noties
users of inappropriate connection, which means there will be no more
confusion of Line-in, Line-out, and Mic jacks.
Gigabit LAN solution
The onboard LAN controller is a highly integrated Gb LAN controller. It is
enhanced with an ACPI management function to provide efcient power
management for advanced operating systems.
1.3.2 ASUS Hybrid DIGI+ VRM
Hybrid DIGI+ VRM: Maximizing System Potential
ASUS brings the exclusive Hybrid DIGI+ VRM design to great value
motherboards to better serve a wider range of user needs. Based on
technology developed for high performance ASUS products, Hybrid
DIGI+ VRM on ASUS motherboards with the AMD A55 chipset allows
APU voltage and VRM frequency adjustments via smart preset modes
and user-dened proles. The unique design offers a broad range of
adjustable power options to create more headroom for exible system
tuning. Boosted by world-renowned ASUS quality, it creates an all-round
platform for a diverse range of applications, including gaming, multimedia,
and productivity, all with improved multitasking.
* Hybrid DIGI+ VRM functions also available in FM1 socket compatible CPUs
EPU
Tap into the world’s rst real-time PC power saving chip through the AI
Suite II utility. Get total system-wide energy optimization by automatically
detecting current PC loadings and intelligently moderating power
consumption. This also reduces fan noise and extends component
longevity.
Chapter 1: Product introduction1-2
1.3.3 ASUS Exclusive Features
Easy & Flexible
UEFI BIOS
ASUS UEFI BIOS
Flexible and Easy BIOS Interface
ASUS UEFI BIOS offers the rst mouse-controlled graphical BIOS
designed with selectable modes, providing a user-friendly interface
that goes beyond the traditional keyboard-only controls. It also natively
supports fully-utilized hard drives larger than 2.2TB in 64-bit operating
systems.
ASUS exclusive interface
EZ Mode displays frequently-accessed info. Users can choose system
performance settings, and drag and drop boot priorities. Advanced Mode
for performance enthusiasts includes detailed DRAM settings via a
dedicated memory info page for complete insight.
New upgrade! Quick and easy information for enhanced system
control
- F12 BIOS snapshot hotkey for sharing UEFI information and
troubleshooting
- New F3 Shortcut for most accessed information
- ASUS DRAM SPD (Serial Presence Detect) information for accessing
memory information, detecting faulty DIMMs, and helping with difcult
POST situations.
Network iControl
With a one-click on/off button, the software currently in use is set
as top priority over all other network programs, dominating the
network bandwidth with ease. Moreover, you can prioritize your
favorite software easily by conguring proles through the intutive
user interface. Within the prole, programs can be pre-scheduled
to run in a specic time period to avoid network clogging and
long-waits on downloads. Auto PPPoE network connection gives
a one-step setup and an intuitive network bandwidth control
center.
The Network iControl feature does not support Windows® XP/Vista operating systems.
ASUS Anti-Surge Protection
This special design prevents expensive devices and the motherboard
from damage caused by power surges from switching power supply
(PSU).
ASUS F1A55-M LK R2.0 1-3
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 and chassis
fan speeds 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 proles offer exible controls of fan
speed to achieve a quiet and cool environment.
ASUS MyLogo2™
This feature allows you to convert your favorite photo into a 256-color
boot logo for a more colorful and vivid image on your screen.
ASUS CrashFree BIOS 3
ASUS CrashFree BIOS 3 is an auto-recovery tool that allows you to
restore a corrupted BIOS le using the bundled support DVD or USB
ash disk that contains the latest BIOS le.
ASUS EZ Flash 2
ASUS EZ Flash 2 is a utility that allows you to update the BIOS without
using an OS-based utility.
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 efciency
requirements in regards to energy consumptions. This is in line with
ASUS vision of creating environment-friendly and energy-efcient
products through product design and innovation to reduce carbon
footprint of the product and thus mitigate environmental impacts.
Chapter 1: Product introduction1-4
1.4 Before you proceed
SB_PWR
ON
Standby Power Powered Off
OFF
F1A55-M LK R2.0
F1A55-M LK R2.0 Onboard LED
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.
ASUS F1A55-M LK R2.0 1-5
F1A55-M LK R2.0
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.
1.5.2 Screw holes
Place six screws into the holes indicated by circles to secure the motherboard to the chassis.
DO NOT overtighten the screws! Doing so can damage the motherboard.
Place this side towards
the rear of the chassis.
Chapter 1: Product introduction1-6
1.5.3 Motherboard layout
F1A55-M LK R2.0
PCIEX16
PCIEX1_1
PCI1
USB78 USB56
F_PANEL
SPEAKER
KBPWR
USBPW1-4
USBPW5-8
CLRTC
AAFP
ATX12V
EATXPWR
CPU_FAN
CHA_FAN
Lithium Cell
CMOS Power
Super
I/O
ALC
887
Atheros
8161
EPU
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_4SATA3G_3
SATA3G_1
SATA3G_2
AUDIO
KBMS
LAN_USB12
USB34
18.6cm(7.3in)
VGA
DVI
SOCKET FM1
COM1
53 41 632
4
8911 10121314 2
7
7
1.5.4 Layout contents
Connectors/Jumpers/Slots/LED Page Connectors/Jumpers/Slots/LED Page
1. Keyboard power (3-pin KBPWR) 1-19 8. System panel connector (10-1 pin F_PANEL) 1-24
2. USB device wake-up (3-pin USBPW1-4, 3-pin
USBPW5-8)
3. CPU and chassis fan connectors (4-pin
CPU_FAN and 3-pin CHA_FAN)
4. ATX power connectors (24-pin EATXPWR, 4-pin
ATX12V)
5. AMD FM1 socket
6. DDR3 DIMM slots
7. SATA 3.0Gb/s connectors (7-pin SATA3G_1~4)
ASUS F1A55-M LK R2.0 1-7
1-19 9. Speaker connector (4-pin SPEAKER) 1-22
1-21 10. Standby power LED (SB_PWR) 1-5
1-22 11. USB 2.0 connectors (10-1 pin USB56,
1-8 12. Clear RTC RAM (3-pin CLRTC) 1-18
1-11 13. Serial port connector (10-1 pin COM1) 1-25
1-23 14. Front panel audio connector (10-1 pin AAFP) 1-25
USB78)
1-26
1.6 Accelerated Processing Unit (APU)
F1A55-M LK R2.0
F1A55-M LK R2.0 CPU socket FM1
This motherboard comes with an FM1 socket designed for AMD® A- & E2- series accelerated
processors with AMD® Radeon™ HD 6000 series graphics.
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!
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!
Socket lever
Small triangle
Gold triangle
Chapter 1: Product introduction1-8
5. When the APU is in place, push down the socket
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
F1A55-M LK R2.0
F1A55-M LK R2.0 CPU fan connector
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.
ASUS F1A55-M LK R2.0 1-9
1.6.2 Installing the heatsink and fan
1
3
4
5
2
Ensure that you use only AMD-certied heatsink and fan assembly.
To install the CPU heatsink and fan:
1. Place the heatsink on top of the installed CPU, ensuring that the heatsink ts properly
on the retention module base.
• The retention module base is already installed on the motherboard upon purchase.
• You do not have to remove the retention module base when installing the CPU or
installing other motherboard components.
• If you purchased a separate CPU heatsink and fan assembly, ensure that a Thermal
Interface Material is properly applied to the CPU heatsink or CPU before you install the
heatsink and fan assembly.
CPU Fan
CPU Heatsink
Retention bracket
Retention Module Base
Retention bracket lock
Your boxed CPU heatsink and fan assembly should come with installation instructions for
the CPU, heatsink, and the retention mechanism. If the instructions in this section do not
match the CPU documentation, follow the latter.
2. Attach one end of the retention bracket to the retention module base.
Chapter 1: Product introduction1-10
3. Align the other end of the retention bracket to the retention module base. A clicking
F1A55-M LK R2.0
F1A55-M LK R2.0 240-pin DDR3 DIMM sockets
DIMM_A1
DIMM_B1
sound denotes that the retention bracket is in place.
Ensure that the fan and heatsink assembly perfectly ts the retention mechanism module
base, otherwise you cannot snap the retention bracket in place.
4. Push down the retention bracket lock on the retention mechanism to secure the
heatsink and fan to the module base.
5. When the fan and heatsink assembly is in place, connect the CPU fan cable to the
connector on the motherboard labeled CPU_FAN.
DO NOT forget to connect the CPU fan connector! Hardware monitoring errors can occur if
you fail to plug this connector.
1.7 System memory
1.7.1 Overview
This 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 F1A55-M LK R2.0 1-11
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