A55-C
Motherboard
E7917
First Edition
January 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, modified or altered, unless such repair, modification of alteration is authorized in writing byASUS; 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), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY 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 RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation and to the owners’ benefit, 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 notification to the email address gpl@asus.com, 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...................................................................................................... |
vi |
About this guide......................................................................................................... |
vii |
A55-C specifications summary.................................................................................. |
ix |
Package contents....................................................................................................... |
xi |
Product introduction
1.1 |
Special features............................................................................................. |
1-1 |
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1.1.1 |
Product highlights ............................................................................ |
1-1 |
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1.1.2 |
ASUS Exclusive Features ............................................................... |
1-1 |
1.2 |
Before you proceed...................................................................................... |
1-3 |
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1.3 |
Motherboard overview.................................................................................. |
1-4 |
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1.3.1 |
Placement direction ......................................................................... |
1-4 |
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1.3.2 |
Screw holes ..................................................................................... |
1-4 |
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1.3.3 |
Motherboard layout .......................................................................... |
1-5 |
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1.3.4 |
Layout contents . .............................................................................. |
1-6 |
1.4 |
Accelerated Processing Unit (APU)............................................................ |
1-6 |
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1.4.1 |
APU installation . .............................................................................. |
1-7 |
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1.4.2 |
APU heatsink and fan assembly installation .................................... |
1-8 |
1.5 |
System memory.......................................................................................... |
1-10 |
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1.5.1 |
Overview ........................................................................................ |
1-10 |
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1.5.2 |
Memory configurations . ................................................................. |
1-10 |
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1.5.3 |
Installing a DIMM ........................................................................... |
1-15 |
1.6 |
Expansion slots........................................................................................... |
1-16 |
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1.6.1 |
Installing an expansion card .......................................................... |
1-16 |
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1.6.2 |
Configuring an expansion card ...................................................... |
1-16 |
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1.6.3 |
PCI slots . ....................................................................................... |
1-16 |
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1.6.4 |
PCI Express x1 slots ..................................................................... |
1-16 |
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1.6.5 |
PCI Express x16 slot . .................................................................... |
1-16 |
1.7 |
Jumpers |
....................................................................................................... |
1-18 |
1.8 |
Connectors.................................................................................................. |
1-20 |
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1.8.1 ............................................................................ |
Rear panel ports |
1-20 |
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1.8.2 ........................................................................ |
Internal connectors |
1-22 |
1.9 |
Software .........................................................................................support |
1-28 |
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1.9.1 ....................................................... |
Installing an operating system |
1-28 |
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1.9.2 ............................................................... |
Support DVD information |
1-28 |
iii
BIOS information
2.1 |
Managing and updating your BIOS............................................................. |
2-1 |
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2.1.1 |
ASUS Update utility......................................................................... |
2-1 |
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2.1.2 |
ASUS EZ Flash 2............................................................................ |
2-2 |
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2.1.3 |
ASUS CrashFree BIOS 3 utility....................................................... |
2-3 |
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2.1.4 |
ASUS BIOS Updater....................................................................... |
2-4 |
2.2 |
BIOS setup program..................................................................................... |
2-6 |
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2.3 |
Main menu................................................................................................... |
2-10 |
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2.3.1 |
System Language [English]........................................................... |
2-10 |
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2.3.2 |
System Date [Day xx/xx/xxxx]....................................................... |
2-10 |
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2.3.3 |
System Time [xx:xx:xx].................................................................. |
2-10 |
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2.3.4 |
Security.......................................................................................... |
2-10 |
2.4 |
Ai Tweaker menu......................................................................................... |
2-12 |
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2.4.1 |
Ai Overclock Tuner [Auto].............................................................. |
2-12 |
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2.4.2 |
Memory Frequency [Auto]............................................................. |
2-12 |
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2.4.3 |
EPU Power Saving Mode [Disabled]............................................. |
2-12 |
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2.4.4 |
DIGI+ VRM.................................................................................... |
2-13 |
2.5 |
Advanced menu.......................................................................................... |
2-14 |
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2.5.1 |
CPU Configuration......................................................................... |
2-14 |
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2.5.2 |
SATAConfiguration........................................................................ |
2-15 |
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2.5.3 |
USB Configuration......................................................................... |
2-16 |
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2.5.4 |
NB Configuration........................................................................... |
2-16 |
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2.5.5 |
Onboard Devices Configuration.................................................... |
2-17 |
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2.5.6 |
APM............................................................................................... |
2-18 |
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2.5.7 |
Network Stack............................................................................... |
2-19 |
2.6 |
Monitor menu.............................................................................................. |
2-20 |
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2.6.1 |
CPU Temperature / MB Temperature [xxxºC/xxxºF]...................... |
2-20 |
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2.6.2 |
CPU / Chassis fan Speed [xxxx RPM] or [Ignore] / [N/A].............. |
2-20 |
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2.6.3 |
CPU Q-Fan Control [Enabled]....................................................... |
2-20 |
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2.6.4 |
CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage................... |
2-21 |
iv
2.7 |
Boot menu................................................................................................... |
2-22 |
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2.7.1 |
Fast Boot [Enabled]....................................................................... |
2-23 |
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2.7.2 |
Full Screen Logo [Enabled]........................................................... |
2-23 |
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2.7.3 |
Post Delay Time [3 sec]................................................................. |
2-24 |
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2.7.4 |
Bootup NumLock State [On].......................................................... |
2-24 |
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2.7.5 |
Wait for ‘F1’ If Error [Enabled]....................................................... |
2-24 |
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2.7.6 |
Option ROM Messages [Force BIOS]........................................... |
2-24 |
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2.7.7 |
Interrupt 19 Capture [Postponed].................................................. |
2-24 |
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2.7.8 |
Setup Mode [EZ Mode].................................................................. |
2-24 |
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2.7.9 |
CSM (Compatibility Support Module)............................................ |
2-24 |
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2.7.10 |
Secure Boot................................................................................... |
2-25 |
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2.7.11 |
Boot Option Priorities..................................................................... |
2-26 |
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2.7.12 |
Boot Override................................................................................ |
2-26 |
2.8 |
Tools menu.................................................................................................. |
2-27 |
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2.8.1 |
ASUS EZ Flash 2 Utility................................................................. |
2-27 |
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2.8.2 |
ASUS SPD Information................................................................. |
2-27 |
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2.8.3 |
ASUS O.C. Profile......................................................................... |
2-27 |
2.9 |
Exit menu..................................................................................................... |
2-28 |
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Appendices
Notices...................................................................................................................... |
A-1 |
ASUS contact information...................................................................................... |
A-3 |
Safety information
Electrical safety
•To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system.
•When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device.
•Before connecting or removing signal cables from the motherboard, ensure that all power cables are unplugged.
•Seek professional assistance before using an adapter or extension cord. These devices could interrupt the grounding circuit.
•Ensure that your power supply is set to the correct voltage in your area. If you are not sure about the voltage of the electrical outlet you are using, contact your local power company.
•If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer.
Operation safety
•Before installing the motherboard and adding devices on it, carefully read all the manuals that came with the package.
•Before using the product, ensure all cables are correctly connected and the power cables are not damaged. If you detect any damage, contact your dealer immediately.
•To avoid short circuits, keep paper clips, screws, and staples away from connectors, slots, sockets and circuitry.
•Avoid dust, humidity, and temperature extremes. Do not place the product in any area where it may become wet.
•Place the product on a stable surface.
•If you encounter technical problems with the product, contact a qualified service technician or your retailer.
vi
About this guide
This user guide contains the information you need when installing and configuring the motherboard.
How this guide is organized
This guide contains the following parts:
•Chapter 1: Product introduction
This chapter describes the features of the motherboard and the new technology it supports.
•Chapter 2: BIOS information
This chapter tells how to change system settings through the BIOS Setup menus. Detailed descriptions of the BIOS parameters are also provided.
Where to find 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 flyers, that may have been added by your dealer. These documents are not part of the standard package.
vii
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 |
Used to emphasize a word or a phrase. |
<Key> |
Keys enclosed in the less-than and greater-than sign |
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means that you must press the enclosed key. |
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Example: <Enter> means that you must press the Enter or |
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Return key. |
<Key1> + <Key2> + <Key3> |
If you must press two or more keys simultaneously, the key |
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names are linked with a plus sign (+). |
viii
A55-C specifications summary
APU |
FM2 socket for AMD® A-Series Accelerated Processor Unit (APU) with AMD |
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Radeon™ HD 7000 Series graphics, up to 4 CPU cores |
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Supports AMD® Turbo Core Technology 3.0 |
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• The AMD® Turbo Core Technology 3.0 support depends on the APU types. |
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• Refer to www.asus.com for the AMD® APU support list. |
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Chipset |
AMD® A55 FCH |
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Memory |
2 x 240-pin DIMM slots support a maximum 32GB unbuffered non-ECC |
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DDR3 1866/1600/1333/1066 MHz memory modules |
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Dual-channel memory architecture |
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Graphics
Expansion slots
Storage / RAID
LAN
Audio
USB
•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 (Qualified Vendors List).
•When you install a total memory of 4GB capacity or more, Windows® 32-bit operating system may only recognize less than 3GB. We recommend a maximum of 3GB system memory if you are using a Windows® 32-bit operating system.
Integrated AMD® Radeon™ HD 7000 series graphics in Trinity APU VGA output support: D-Sub port
-Supports D-Sub with a maximum resolution of 1920x1600@60Hz
-Supports Microsoft® DirectX 11
-Maximum shared memory of 2GB
-Supports AMD® Dual Graphics technology
*Refer to www.amd.com for a list of discrete GPUs that support Dual Graphics.
1 x PCIe 2.0 x16 slot
3 x PCIe 2.0 x1 slots
3 x PCI slots
AMD® A55 FCH:
-6 x Serial ATA 3.0Gb/s connectors with RAID 0, RAID 1, RAID 10 and JBOD support
Realtek® 8111F PCIe Gigabit LAN controller
Realtek® ALC887 8-channel High DefinitionAudio CODEC
AMD® A55 FCH:
- 10 x USB 2.0/1.1 ports (6 ports at the rear panel, 4 ports at the front panel)
(continued on the next page)
ix
A55-C specifications summary
ASUS unique features
Special features
Back Panel I/O ports
Internal I/O connectors / buttons / switches
BIOS
Support DVD
Form Factor
ASUS Exclusive Features
-ASUS iCafe Memory Anti-theft
-ASUS AI Suite II
-AI Charger
-ASUS UEFI BIOS
ASUS Quiet Thermal Solution
-Stylish heatsink solution
-ASUS Q-Fan
ASUS EZ DIY
-ASUS CrashFree BIOS 3
-ASUS EZ Flash 2
-ASUS MyLogo 2™
100% All high-quality conductive polymer
1 x PS/2 mouse port
1 x PS/2 keyboard port
1 x D-Sub
1 x COM
1 x LAN (RJ-45) port
6 x USB 2.0 ports
3 x audio jacks
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports 6 x SATA 3.0Gb/s connectors
1 x CPU fan connector
1 x Chassis fan connector
1 x Speaker connector
1 x High-definition front panel audio connector
1 x Chassis intrusion connector
1 x 10-pin System panel connector
1 x 24-pin EATX power connector
1 x 4-pin ATX 12V power connector
64Mb Flash ROM, UEFI BIOS, PnP, DMI 2.0, WfM 2.0, ACPI 2.0a, SM BIOS 2.6
Drivers
ASUS Update
ASUS utilities
Anti-Virus software (OEM version)
ATX form factor: 12.0 in x 8.1 in (30.5 cm x 20.6 cm)
Specifications are subject to change without notice.
Package contents
Check your motherboard package for the following items.
KBMS KBPWR
CPU_FAN
USBPW1~6
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EPU |
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ATX12V |
VGA |
COM |
USB56 |
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USB34 |
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LAN_USB12 |
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240-pin module) |
240-pin module) |
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FM2 |
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SOCKET |
DIMM A1 (64bit, |
DIMM B1 (64bit, |
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DDR3 |
DDR3 |
AUDIO
CHA_FAN
PCIEX1_1
PCIEX16
EATXPWR
A55-C
PCIEX1_2
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BATTERY |
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AMD® |
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Super |
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I/O |
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PCIEX1_3 |
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A55 |
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PCI1 |
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SATA3G_2 |
SATA3G_4 |
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SATA3G_6 |
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ALC |
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PCI2 |
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SATA3G_1 |
SATA3G_3 |
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887 |
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64Mb |
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PCI3 |
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BIOS |
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AAFP |
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USB910 |
USB78 |
USBPW7~10 |
F_PANEL |
SPEAKER |
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CHASSIS |
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CLRTC |
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ASUS A55-C motherboard |
2 x Serial ATA 3.0 Gb/s |
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cables |
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Guide |
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User |
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1 x I/O Shield |
User Manual |
Support DVD |
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•If any of the above items is damaged or missing, contact your retailer.
•The illustrated items above are for reference only.Actual product specifications may vary with different models.
xi
xii
Product introduction |
1 |
1.1Special features
1.1.1Product highlights
AMD® A-series accelerated processors with AMD® Radeon™ HD 7000 series graphics
This motherboard supports AMD® A-series accelerated processors with AMD® Radeon™ HD 7000 series graphics. This revolutionary APU (Accelerated Processing Unit) combines processing power and advanced DirectX 11 graphics in one small, energy-efficient design that provides accelerated performance and an industry-leading visual experience. It features Dual-channel DDR3 memory support and data transfer rates up to 5GT/s.
AMD® A55 FCH chipset
AMD® A55 FCH is designed to support up to 5GT/s interface speed and AMD® CrossFireX™ multi-GPU technology. It also supports 6 x SATA 3.0Gb/s ports.
100% All High-quality Conductive Polymer Capacitors
This motherboard uses all high-quality conductive polymer capacitors for durability, improved lifespan, and enhanced thermal capacity.
1.1.2ASUS Exclusive Features
ASUS UEFI BIOS (EZ Mode)
ASUS UEFI BIOS, a UEFI compliant architecture, offers the first mouse-controlled intuitive graphical BIOS interface that goes beyond the traditional keyboard-only BIOS controls, providing you with more flexibility, convenience, and easier navigation than the traditional
BIOS versions. It offers you dual selectable modes and native support for hard drives larger than 2.2 TB.
ASUS UEFI BIOS includes the following new features:
•F12 BIOS snapshot hotkey
•F3 Shortcut for most accessed information
•ASUS DRAM SPD (Serial Presence Detect) information for detecting faulty DIMMs, and helping with difficult POST situations.
ASUS A55-C |
1-1 |
AI Suite II
ASUS AI Suite II integrates several ASUS utilities and allows you to launch and operate these utilities simultaneously. It allows you to configure overclocking settings, adjust frequencies and related voltage settings, remotely control the system via a mobile device, and other tasks.
Ai Charger
ASUS Ai Charger is ASUS’ fast-charging software that supports the Apple iPod, iPhone, and iPad.
• Check your USB mobile device if it fully supports the BC 1.1 standard.
• The actual charging speed may vary with your USB device.
ASUS EZ Flash 2
ASUS EZ Flash 2 is a user-friendly utility that allows you to update the BIOS without using a bootable floppy disk or an OS-based utility.
ASUS MyLogo2™
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 file using the bundled support DVD or a USB flash disk that contains the BIOS file.
1-2 |
Chapter 1: Product introduction |
1.2Before 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.
ASUS A55-C |
1-3 |
1.3Motherboard overview
1.3.1Placement 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.
1.3.2Screw 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.
A55-C
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1-4 |
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Chapter 1: Product introduction |
|||||||||||||||||||||||||||
1.3.3Motherboard layout
1 |
2 |
3 |
4 |
5 |
4 |
6 |
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20.6cm(8.1in) |
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KBMS |
KBPWR |
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CPU_FAN |
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USBPW1~6 |
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EPU |
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ATX12V |
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VGA |
COM |
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FM2 |
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module) |
module) |
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USB56 |
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240-pin |
240-pin |
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USB34 |
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SOCKET |
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A1DIMM(64bit, |
B1DIMM(64bit, |
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LAN_USB12 |
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DDR3 |
DDR3 |
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3 |
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RTL |
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EATXPWR |
30.5cm(12.0in) |
AUDIO |
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CHA_FAN |
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PCIEX1_1 |
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8111F |
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PCIEX16 |
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A55-C |
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PCIEX1_2 |
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Super |
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BATTERY |
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AMD® |
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I/O |
PCIEX1_3 |
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A55 |
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PCI1 |
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SATA3G_2 |
SATA3G_4 |
SATA3G_6 |
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PCI2 |
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7 |
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ALC |
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SATA3G_1 |
SATA3G_3 |
SATA3G_5 |
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887 |
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64Mb |
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PCI3 |
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BIOS |
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AAFP |
USB910 |
USB78 |
USBPW7~10 F_PANEL |
SPEAKER |
CHASSIS |
CLRTC |
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13 |
12 |
2 |
11 |
10 |
9 |
8 |
ASUS A55-C |
1-5 |
1.3.4Layout contents
Connectors/Jumpers/Slots/LED |
Page |
|
1. |
Keyboard power (3-pin KBPWR) |
1-19 |
2. |
USB device wake-up (3-pin USBPW1~6, and 3-pin USBPW7~10) |
1-19 |
3. |
ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) |
1-23 |
4. |
CPU and chassis fan connectors (4-pin CPU_FAN, and 3-pin CHA_FAN) |
1-22 |
5. |
AMD FM2 socket |
1-6 |
6. |
DDR3 DIMM slots |
1-10 |
7. |
SATA 3.0Gb/s connectors (7-pin SATA3G_1~6) |
1-24 |
8. |
Clear RTC RAM (3-pin CLRTC) |
1-18 |
9. |
Chassis intrusion connector (4-pin CHASSIS) |
1-26 |
10. |
Speaker connector (4-pin SPEAKER) |
1-27 |
11. |
Front panel (10-pin F_PANEL) |
1-25 |
12. |
USB 2.0 connectors (10-1 pin USB78, USB910) |
1-27 |
13. |
Front panel audio connector (10-1 pin AAFP) |
1-26 |
1.4Accelerated Processing Unit (APU)
This motherboard comes with an FM2 socket designed for AMD® A-series accelerated processors with AMD® Radeon™ HD 7000 series graphics.
Ensure that you use anAPU designed for the FM2 socket. TheAPU fits in only one correct orientation. DO NOT force the APU into the socket to prevent bending the pins and damaging the APU!
A55-C
A55-C CPU socket FM2
1-6 |
Chapter 1: Product introduction |
1.4.1APU installation
1 |
2 |
3 |
4 |
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ASUS A55-C |
1-7 |
||||||
1.4.2APU heatsink and fan assembly installation
Apply the Thermal Interface Material to the APU heatsink and APU before you install the heatsink and fan if necessary.
To install the APU heatsink and fan assembly
1 |
2 |
3 |
4 |
5 |
1-8 |
Chapter 1: Product introduction |
To uninstall the APU heatsink and fan assembly
1 |
2 |
3 |
4 |
5
ASUS A55-C |
1-9 |
1.5System memory
1.5.1Overview
This motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory Modules (DIMM) sockets.
A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are developed for better performance with less power consumption.
The figure illustrates the location of the DDR3 DIMM sockets:
DIMM_B1
DIMM_A1
|
Channel |
Sockets |
|
Channel A |
DIMM_A1 |
A55-C |
Channel B |
DIMM_B1 |
A55-C 240-pin DDR3 DIMM sockets
1.5.2Memory configurations
You may install 1GB, 2GB, 4GB, 8GB, and 16GB unbuffered non-ECC DDR3 DIMMs into the DIMM sockets.
•You may install varying memory sizes in ChannelAand Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration.Any excess memory from the higher-sized channel is then mapped for single-channel operation.
•We recommend that you install the memory modules on the blue slots for better overclocking capability.
•Always install DIMMs with the same CAS latency. For optimal compatibility, we recommend that you install memory modules of the same version or date code (D/C) from the same vendor. Check with the retailer to get the correct memory modules.
•Due to the memory address limitation on 32-bit Windows® OS, when you install 4GB or more memory on the motherboard, the actual usable memory for the OS can be about 3GB or less. For effective use of memory, we recommend that you do any of the following:
-Install a maximum of 3GB system memory if you are using a 32-bit Windows® OS.
-Use a 64-bit Windows® OS if you want to install 4GB or more memory on the motherboard.
•This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less.
•The maximum 32GB memory capacity can be supported with 16GB or above DIMMs. ASUS will update the memory QVL once the DIMMs are available in the market.
1-10 |
Chapter 1: Product introduction |
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