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Motherboard
M4A78-EM

ii
Copyright © 2009 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, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the
product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS
DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),
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 identication or explanation and to the
owners’ benet, without intent to infringe.
E4419
First Edition V1
February 2009

iii
Contents
Notices ......................................................................................................... vi
Safety information ..................................................................................... vii
About this guide ........................................................................................ vii
M4A78-EM specications 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 Innovative ASUS features ...............................................1-3
1.4 Before you proceed .....................................................................1-5
1.5 Motherboard overview .................................................................1-6
1.5.1 Placement direction ........................................................1-6
1.5.2 Screw holes ....................................................................1-6
1.5.3 Motherboard layout .........................................................1-7
1.5.4 Layout contents ...............................................................1-7
1.6 Central Processing Unit (CPU) ...................................................1-8
1.6.1 Installing the CPU ...........................................................1-8
1.6.2 Installing the heatsink and fan ......................................1-10
1.7 System memory .........................................................................1-11
1.7.1 Overview ........................................................................1-11
1.7.2 Memory congurations ..................................................1-12
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 Conguring an expansion card .....................................1-17
1.8.3 PCI slots ........................................................................1-17
1.8.4 PCI Express p3-x1 slot .......................................................1-17
1.8.5 PCI Express x16 slot .....................................................1-17
1.9 Jumpers ......................................................................................1-18
1.10 Connectors .................................................................................1-19
1.10.1 Rear panel ports ...........................................................1-19
1.10.2 Internal connectors .......................................................1-21
Produktspecifikationer
Varumärke: | Asus |
Kategori: | moderkort |
Modell: | M4A78 |
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