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GA-MA78GM-US2H
AM2+/AM2 socket motherboard for AMD PhenomTM FX processor/AMD PhenomTM X4 processor/ AMD PhenomTM X3 processor/AMD AthlonTM X2 processor/ AMD AthlonTM processor/AMD SempronTM X2 processor/ AMD SempronTM processor

User's Manual
Rev. 1002 12ME-MA78GU2-1002R

Motherboard GA-MA78GM-US2H

Motherboard

Dec. 12, 2008
Dec. 12, 2008

-2-

GA-MA78GM-US2H

Copyright
©2008 GIGA-BYTE TECHNOLOGY CO., LTD. All rights reserved. The trademarks mentioned in this manual are legally registered to their respective owners.

Disclaimer
Information in this manual is protected by copyright laws and is the property of GIGABYTE. Changes to the specifications and features in this manual may be made by GIGABYTE without prior notice. No part of this manual may be reproduced,copied, translated, transmitted, or published in any form or by any means without GIGABYTE's prior written permission.

Documentation Classifications
In order to assist in the use of this product, GIGABYTE provides the following types of documentations:  For quick set-up of the product, read the Quick Installation Guide included with the product.  For detailed product information, carefully readthe User's Manual.  For instructions on how to use GIGABYTE's unique features, read or download the information on/from the Support\Motherboard\Technology Guide page on our website. For product-related information, check on our website at: http://www.gigabyte.com.tw

Identifying Your Motherboard Revision
The revision number on your motherboard looks like this: "REV: X.X." For example, "REV:1.0" means the revision of the motherboard is 1.0. Check your motherboard revision before updating motherboard BIOS, drivers, or when looking for technical information. Example:

-3-

Table of Contents
Box Contents ................................................................................................................. 6 OptionalItems................................................................................................................. 6 GA-MA78GM-US2H Motherboard Layout ..................................................................... 7 Block Diagram................................................................................................................ 8 Chapter 1 Hardware Installation.................................................................................... 9
1-1 1-2 1-3 Installation Precautions ..................................................................................... 9 Product Specifications .................................................................................... 10 Installing the CPU and CPU Cooler .............................................................. 13
1-3-1 1-3-2 Installing the CPU................................................................................................ 13 Installing the CPU Cooler ................................................................................... 15 Dual Channel Memory Configuration ................................................................ 16 Installing a Memory............................................................................................. 17

1-4

Installing the Memory ..................................................................................... 16
1-4-1 1-4-2

1-5 1-6 1-7 1-8

Installing an Expansion Card ......................................................................... 18 Enabling the ATI Hybrid CrossFireX Function ................................................ 19 Back Panel Connectors................................................................................. 20 Internal Connectors ........................................................................................ 23

Chapter 2 BIOS Setup ................................................................................................. 35
2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 2-11 2-12 2-13 2-14 Startup Screen...
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