ASUS M4A78-HTPC RC, M4A78-HTPC User Manual

Download

M4A78-HTPC

Series

Motherboard

E4642

Second Edition V2 April 2009

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, modied or altered, unless such repair, modication 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 identication or explanation and to the owners’ benet, without intent to infringe.

Contents ...................................................................................................... iii

Notices ......................................................................................................... vi

Safety information ..................................................................................... vii

About this guide ........................................................................................ vii

M4A78-HTPC specications summary ..................................................... ix

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 Innovative ASUS 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 Central Processing Unit (CPU) ...................................................

1.6.1 Installing the CPU ...........................................................

1.6.2 Installing the heatsink and fan ........................................

1.7 System memory .........................................................................

1.7.1 Overview .......................................................................

1.7.2 Memory congurations ..................................................

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 Conguring an expansion card .....................................

1.8.3 PCI slot .........................................................................

1.8.4 PCI Express x1 slots .....................................................

1.8.5 PCI Express 2.0 x16 slot ...............................................

1.9 Jumpers ......................................................................................

1.10 Connectors .................................................................................

1.10.1 Rear panel connectors ..................................................

1.10.2 Internal connectors .......................................................

1-1

1-2

1-4

1-5

1-6

1-7

1-8

1-10

1-15

1-16

1-17

1-18

1-22

iii

Contents

1.11 Software support ........................................................................ 1-31

1.11.1 Installing an operating system ......................................

1.11.2 Support DVD information ..............................................

1.11.3 ASUS Home Theater Gate

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 utility ...................................................

2.1.3 ASUS CrashFree BIOS 3 utility ......................................

2.2 BIOS setup program ....................................................................

2.2.1 BIOS menu screen ..........................................................

2.2.2 Menu bar .........................................................................

2.2.3 Navigation keys ...............................................................

2.2.4 Menu items .....................................................................

2.2.5 Submenu items ...............................................................

2.2.6 Conguration elds .........................................................

2.2.7 General help ...................................................................

2.2.8 Pop-up window ...............................................................

2.2.9 Scroll bar .........................................................................

2.3 Main menu ....................................................................................

2.3.1 System Time [xx:xx:xx] ...................................................

2.3.2 System Date [Day xx/xx/xxxx] .........................................

2.3.3 Language [English] .........................................................

2.3.4 SATA 1/SATA 3 ................................................................

2.3.5 SATA 1–5/ESATA ...........................................................

2.3.6 SATA Conguration .........................................................

2.3.7 System Information .........................................................

2.4 Advanced menu ...........................................................................

2.4.1 JumperFree Conguration ..............................................

2.4.2 CPU Conguration ........................................................

2.4.3 Chipset ..........................................................................

2.4.4 Onboard Devices Conguration ....................................

2.4.5 PCIPnP .........................................................................

2.4.6 USB Conguration ........................................................

............................................ 1-32

1-31

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

2-9

2-12

2-13

2-15

Contents

2.5 Power menu ................................................................................ 2-16

2.5.1 Suspend Mode [Auto] ...................................................

2.5.2 ACPI 2.0 Support [Disabled] .........................................

2.5.3 ACPI APIC Support [Enabled] .......................................

2.5.4 APM Conguration ........................................................

2.5.5 Hardware Monitor .........................................................

2.6 Boot menu ..................................................................................

2.6.1 Boot Device Priority ......................................................

2.6.2 Boot Settings Conguration ..........................................

2.6.3 Security .........................................................................

2.7 Tools menu .................................................................................

2.7.1 ASUS EZ Flash 2 ..........................................................

2.7.2 Express Gate [Auto] ......................................................

2.7.3 AI NET 2

2.8 Exit menu ....................................................................................

........................................................................ 2-21

2-16

2-17

2-18

2-19

2-21

2-22

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.

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://green.asus.com/english/REACH.htm.

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.

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 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.

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 setup

This chapter tells how to change system settings through the BIOS Setup menus.

Detailed descriptions of the BIOS parameters are also provided.

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.

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>

Command Means that you must type the command exactly as shown, then supply the required item or value enclosed in brackets. Example: At the DOS prompt, type the command line:

afudos /iM4A78HT.ROM

viii

M4A78-HTPC specications summary

CPU AMD® Phenom™ X4 / Phenom™ X3 / Athlon™ X2 /

Athlon™ / Sempron™ processors (socket AM2+/AM2) Supports AM3 Phenom™ II / Athlon™ X4/ Athlon™ X3 /

Athlon™ X2

AMD® 45nm CPU support AMD Cool’n’Quiet™ Technology

Chipset AMD® 780G / SB700

System bus Up to 5200 MT/s; HyperTransport™ 3.0 interface for

AM3 / AM2+ CPU 2000 / 1600 MT/s for AM2 CPU

Memory Dual-channel memory architecture

- 4 x 240-pin DIMM sockets support unbufferred ECC / non-ECC DDR2 1066* / 800 / 667 MHz

memory modules

- Supports up to 16GB system memory

* Due to AMD

CPU limitation, DDR2 1066 is supported by

AM3 / AM2+ CPUs for one DIMM per channel only. Refer

to www.asus.com or this user manual for the Memory QVL

(Qualied Vendors Lists).

** Due to OS limitation, when installing total memory of 4GB

capacity or more, Windows 32-bit operation system may only recognize less than 3GB. Hence, a total installed

memory of less than 3GB is recommended.

VGA Integrated ATI Radeon™ HD 3200 GPU

- Supports HDMI™ Technology with max. resolution up to 1920 x 1200 (1080P)

- Supports Dual-link DVI with max. resolution up to 2560 x 1600 @ 60Hz

- Supports D-Sub with max. resolution up to 2560 x 1440 @ 75Hz for 16:9 format

- Hybrid CrossFireX™ support

HDMI / DVI / D-Sub support (Dual independent displays support with HDMI / DVI and D-Sub)

- Supports Microsoft® DirectX 10, OpenGL 2.0, Pixel

Shader 4.0

- Hardware Decode Acceleration for H.264, VC-1, and MPEG-2

- Maximum shared memory of 256MB

Expansion Slots 1 x PCIe 2.0 x16 slot

2 x PCIe x1 slots 1 x PCI 2.2 slot

(continued on the next page)

M4A78-HTPC specications summary

Storage 1 x Ultra DMA 133/100/66 for up to 2 PATA devices

5 x SATA 3.0 Gb/s ports with RAID 0, 1 and 10 support 1 x External SATA 3.0 Gb/s port * Due to Window

XP/Vista™ limitation, the RAID array with the total capacity over 2TB cannot be set as a boot disk. A RAID array over 2TB can only be set as a data disk only.

LAN Atheros® L1E Gigabit LAN controller featuring AI NET 2

High Denition Audio 10-channel High Denition Audio CODEC

- Supports Jack-Detection and Multi-Streaming

- Optical/Coaxial S/PDIF Out ports at back I/O

- 2-channel gold-plated RCA output at back I/O

- DTS Surround Sensation UltraPC

- ASUS Noise Filter

USB 10 x USB 2.0 /1.1 ports (6 ports at midboard; 4 ports at

back panel)

AI Lifestyle Unique Features

ASUS Power Solution:

- ASUS 4+1 Phase Power Design

ASUS Absolute Pitch Hi-Fi ASUS Quiet Thermal Solution:

- ASUS Tranquil Mode (AM3/AM2+ CPUs only)

- ASUS Fanless Design: heatsink solution

ASUS Express Gate ASUS Home Theater Gate ASUS Crystal Sound

- ASUS Noise Filter ASUS EZ DIY

- ASUS Q-Connector

- ASUS CrashFree BIOS 3

- ASUS EZ Flash 2

Other Features ASUS MyLogo 2™

(continued on the next page)

M4A78-HTPC specications summary

ASUS Exclusive Overclocking Features

Rear panel I/O ports 1 x S/PDIF Out port (Coaxial)

Internal I/O connectors 3 x USB connectors support 6 USB ports

Precision Tweaker:

- vCore: Adjustable CPU voltage at 50mv increment

SFS (Stepless Frequency Selection):

- FSB tuning from 200MHz up to 550MHz at 1MHz increment

- GPU tuning from 500MHz up to 999MHz

- PCIe frequency tuning from 100MHz up to 150MHz at 1MHz increment

Overclocking protection:

- ASUS C.P.R. (CPU Parameter Recall)

1 x S/PDIF Out port (Optical) 2-channel RCA audio output ports

1 x HDMI Out port 1 x D-Sub Out port 1 x DVI Out port 1 x LAN (RJ-45) port 4 x USB 2.0/1.1 ports 1 x External SATA port

8-channel audio I/O ports

1 x IDE connector 5 x SATA connectors 1 x CPU Fan connector 2 x Chassis Fan connector 1 x Power Fan connector 1 x Front panel audio connector 1 x S/PDIF Out Header 1 x CD audio in

1 x 24-pin ATX Power connector 1 x 4-pin ATX 12V Power connector

1 x 4-pin Audio Power connector 1 x System Panel (Q-Connector)

(continued on the next page)

M4A78-HTPC specications summary

BIOS features 8 Mb Flash ROM, AMI BIOS, PnP, DMI 2.0, WfM2.0,

Support DVD contents Drivers

Form factor ATX form factor: 9.6 in x 9.6 in (24.4 cm x 24.4 cm)

*Specications are subject to change without notice.

SM BIOS 2.5, ACPI 2.0, ASUS EZ Flash 2

ASUS Express Gate ASUS Home Theater Gate ASUS PC Probe II ASUS Update Anti-Virus Utility (OEM version)

xii

Chapter 1

Product introduction

1.1 Welcome!

Thank you for buying an ASUS® M4A78-HTPC 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 M4A78-HTPC motherboard

Cables 1 x Ultra DMA 133/100/66 cable

1 x Serial ATA signal cable

Accessories 1 x I/O shield 1 x 2 in 1 Q-connector (USB and system panel;

Retail version only) 1 x Remote controller (RC Edition only) 1 x IR receiver (RC Edition only)

Application DVD ASUS motherboard support DVD Documentations User manual

If any of the above items is damaged or missing, contact your retailer.

1.3 Special features

1.3.1 Product highlights

AMD® Phenom™ II / Athlon™ X4 / Athlon™ X3 / Athlon™ X2

Chapter 1: Product introduction 1-1

processors (socket AM3)

This motherboard supports AMD® AM3 multi-core processors with unique L3 cache and delivers better overclocking capabilities with less power

consumption. It features dual-channel DDR2 1066 memory support and accelerates data transfer rate up to 5200MT/s via HyperTransort™ 3.0

based system bus. This motherboard also supports AMD® CPUs in the new 45nm manufacturing process.

AMD® Phenom™ X4 / Phenom™ X3 / Athlon™ X2 / Athlon™ / Sempron™ processors (socket AM2+ / AM2)

The motherboard supports AMD® Socket AM2+ multi-core processors. It

features dual-channel DDR2 1066 memory support, data transfer rate up to 5200MT/s via HyperTransport™ 3.0 based system bus and AMD®

Cool ‘n’ Quiet!™ Technology.

AMD® 780G chipset

The AMD 780G Northbridge is the latest AMD chipset designed for both HT1.0 and 5200MT/s HyperTransport™ 3.0 (HT 3.0) interface speed and external graphics in PCI Express 2.0 standard. It features the integrated ATI RV610-based graphics and fully Directx 10.0 compliant.

Dual channel DDR2 1066 support

This motherboard supports DDR2 1066, which provides faster data

transfer rate and more bandwidth to increase memory data transfer rate

and computing efciency. This enhances system performance in 3D

graphics and other memory demanding applications.

Due to AM2+ CPU limitation, only one DDR2 1066 is supported per channel. When four DDR2 1066 DIMMs are installed, all DIMMs run at 800MHz frequency by default for

system stability.

AMD® Hybrid CrossFireX Technology

Hybrid CrossFireX Technology is a unique multi-GPU technology combining the onboard GPU and the discrete graphics card together to enhance 3D graphics performance.

Visit www.amd.com for the Hybrid CrossreX selected GPUs.

1.3.2 Innovative ASUS features

ASUS Power Solution

ASUS 4+1 Phase Power Design

To fully unleash the next-generation AM3 CPU’s potential, ASUS M4A78-HTPC motherboard has adopted a brand-new 4-phase

VRM power design. It delivers high power efciency and supreme

overclocking ability. Furthermore, high quality power components can effective lower system temperature to ensure longer component lifespan. ASUS M4A78-HTPC also features an extra 1-phase power for integrated

memory/HT controller to provide independent power to vital components.

1-2 ASUS M4A78-HTPC

ASUS HTPC Features

Absolute Pitch Hi-Fi

The independent audio power supply, which is an unprecedented design on motherboards, effectively reduces electrical noise and ensures the purity of sounds. Its gold-plated RCA stereo audio connectors are

compatible with ampliers and do not require any additional connectors,

making it easy and simple to connect your PC to your home theater speakers.

• For better sound quality, connect a power plug to the 4-pin audio power connector.

Refer to page 1-26 for details.

• If you intend to use the RCA audio output function in Windows

RCA Audio item in the BIOS to [Enabled]. Refer to page 2-15 for details.

ASUS Tranquil Mode

The revolutionary ASUS Tranquil Mode effectively reduces fan speeds,

which lower the CPU power usage while increasing energy efciency. With

the reduction in fan speeds, the noise also decreases, thus providing you with the perfect environment to enjoy watching movies or playing music.

ASUS Tranquil Mode is supported by AM3/AM2+ CPU only.

ASUS Home Theater Gate

The ASUS Home Theater Gate, specially designed for the HTPC series, allows you to easily and quickly launch media applications to enjoy your music and movies.

For RC Edition: Use the bundled remote controller to launch the ASUS Home Theater Gate and start media applications.

ASUS Unique Features

ASUS Express Gate

Express Gate is an ASUS exclusive OS, which lets you instantly access the Internet and key applications before entering Windows®.

Vista™ OS, set the

The actual boot time depends on the system conguration.

Chapter 1: Product introduction 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.

Onboard 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.

1-4 ASUS M4A78-HTPC

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 eight 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 introduction 1-5

1.5.3 Motherboard layout

1.5.4 Layout contents

Connectors/Jumpers/Slots Page

1. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) 1-22

2. CPU socket AM2+/AM2

3. CPU, Chassis and Power Fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN1–2,

3-pin PWR_FAN)

4. DDR2 DIMM slots

5. Serial ATA connectors (7-pin SATA1-5)

6. IDE connector (40-1 pin PRI_IDE)

7. Onboard LED (SB_PWR)

8. Clear RTC RAM (CLRTC)

9. System panel connector (10-1 pin PANEL)

10. USB connectors (10-1 pin USB56, USB78, USB910)

11. Audio power connector (4-pin AUDIO_PWR)

12. Optical drive audio in connector (4-pin CD)

13. Front panel audio connector (10-1 pin AAFP)

14. Digital audio connector (4-1 pin SPDIF_OUT)

1-6 ASUS M4A78-HTPC

1-7

1-21

1-10

1-24

1-23

1-4

1-17

1-25

1-26

1-27

1-28

1-27

1.6 Central Processing Unit (CPU)

The motherboard comes with a CPU socket designed for AMD® AM3 Phenom™ II /

Athlon™ X4 / Athlon™ X3 / Athlon™ X2 processors and AM2+ / AM2 Phenom™ X4 / Phenom™ X3 / Athlon™ X2 / Athlon™ / Sempron™ processors.

The CPU socket is not compatible with AMD® Opteron™ processors. Do not install an Opteron™ processor on this motherboard.

1.6.1 Installing the CPU

To install a CPU:

1. Locate the CPU socket on the motherboard.

2. Press the lever sideways to unlock

the socket, then lift it up to a

90°–100° angle.

Socket lever

Ensure that the socket lever is lifted up to 90°–100° angle, otherwise the CPU will not t in

completely.

3. Position the CPU above the socket such that the CPU corner with the gold triangle matches the socket corner with a small triangle.

4. Carefully insert the CPU into the socket until it ts in place.

The CPU ts only in one correct

orientation. DO NOT force the CPU into the socket to prevent bending the pins and damaging the CPU!

Chapter 1: Product introduction 1-7

Small triangle

Gold triangle

5. When the CPU is in place, push down the socket lever to secure the CPU. The lever clicks on the side tab to indicate that it is locked.

6. Install a CPU heatsink and fan following the instructions that came with the heatsink package. You can also refer to section 1.6.2 Installing the 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.

1.6.2 Installing the heatsink and fan

Ensure that you use only AMD-certied heatsink and fan assembly.

To install the CPU heatsink and fan:

1. Place the heatsink on top of the installed CPU, making sure 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

1-8 ASUS M4A78-HTPC

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.

3. Align the other end of the retention bracket to the retention module base. A clicking 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.

Chapter 1: Product introduction 1-9

1.7 System memory

1.7.1 Overview

The motherboard comes with two Double Data Rate 2 (DDR2) Dual Inline Memory Modules (DIMM) sockets. A DDR2 module has the same physical dimensions as a DDR DIMM but has a 240-pin footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are notched differently to prevent installation on a DDR DIMM socket. The gure illustrates the location of the DDR2 DIMM sockets:

Channel Sockets

Channel A DIMM_A1 and DIMM_A2

Channel B DIMM_B1 and DIMM_B2

1.7.2 Memory congurations

You may install 512MB, 1GB, 2GB and 4GB unbuffered ECC/non-ECC DDR2 DIMMs into the

DIMM sockets.

• You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel conguration. Any excess memory from the higher-sized channel is then mapped for single-channel operation.

• Always install DIMMs with the same CAS latency. For optimum compatibility, we recommend that you obtain memory modules from the same vendor.

• 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 install a 64-bit Windows OS when having 4GB or more memory installed on the motherboard.

• This motherboard does not support DIMMs made up of 256 Mb chips or less. (Memory chip capacity counts in Megabit, 8 Megabit/Mb=1 Megabyte/MB.)

• The default memory operation frequency is dependent on its SPD. Under the default state, some memory modules for overclocking may operate at a lower frequency than the vendor-marked value.

• For system stability, use a more efcient memory cooling system to support a full

memory load (4 DIMMs) or overclocking condition.

1-10 ASUS M4A78-HTPC

M4A78-HTPC Motherboard Qualied Vendors Lists (QVL)

DDR2-1066MHz capability

Vendor Part No. Size

Apacer BoxP/N:CH.02GAF.C0KK2

(78.0AG9S.9KF)

Apacer BoxP/N:CH.04GAF.F0KK2

(78.AAGAL.9KF)

CORSAIR BoxP/N:TWIN2X4096-8500C5DF

(CM2X2048-8500C5D)(EPP)

Crucial BL12864AA106A.8FE5(EPP) 1024MB SS N/A Heat-Sink Package 5-5-5-15 2.0 •

G.SKILL F2-8500CL5S-1GBPK 1024MB DS N/A Heat-Sink Package 5-5-5-15 2.0-2.1 • • •

G.SKILL F2-8500CL5D-2GBPK 2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.0-2.1 • •

G.SKILL F2-8500CL5D-4GBPK 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.0-2.1 • • •

GEIL GB22GB8500C5DC 2048MB(Kit of 2) SS GEIL GL2L128M88BA25AB 5-5-5-15 2.2-2.4 •

GEIL GE22GB1066C5DC 2048MB(Kit of 2) SS N/A Heat-Sink Package 5-5-5-15 2.2-2.4 •

GEIL GE24GB1066C5QC 4096MB(Kitof4) SS N/A Heat-Sink Package 5-5-5-15 2.2-2.4 • •

GEIL GE24GB1066C5DC 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.2-2.4 • •

GEIL GB24GB8500C5QC 4096MB(Kitof4) DS GEIL GL2L128M88BA25AB 5-5-5-15 2.2-2.4 •

Hynix HYMP564U64FP8-G7 512MB SS HYNIX HY5PS12821FFP-G7 7 •

Hynix HYMP 512U64FP8-G7 1024MB DS HYNIX HY5PS12821FFP-G7 7-7-7-12 •

KINGMAX KLED48F-A8KI5-EPA 1024MB DS KINGMAX KKA8FEIBF-HJK-18A •

KINGSTON KHX8500D2/ 512 512MB SS Heat-Sink Package • •

KINGSTON KHX8500D2K2/1G 1024MB(Kit of 2) SS N/A Heat-Sink Package 2.2 • •

KINGSTON KHX8500D2K2/1GN(EPP) 2048MB(Kit of 2) SS N/A Heat-Sink Package 800-5-5-5-18 2.2 •

KINGSTON KHX8500D2/1G 1024MB DS N/A Heat-Sink Package 2.2 • • •

KINGSTON KVR1066D2N7/1G 1024MB DS ELPIDA E5108AJBG-1J-E 1066-5-5-5-15 1.8 • •

KINGSTON KHX8500D2K2/2G 2048MB(Kit of 2) DS N/A Heat-Sink Package 2.2 • •

MICRON MT8HTF12864AY-1GAE1 1024MB SS MICRON D9JKH 7 • •

MICRON MT16HTF25664AY-1GAE1 2048MB DS MICRON D9JKH 7 • •

SAMSUNG M378T2953GZ3-CF8 1024MB DS SAMSUNG K4T51083QG 7 •

Transcend TX1066QLU-2GK 2048MB(Kit of 2) SS ELPIDA Heat-Sink Package 5 • •

Transcend TX1066QLU-4GK 4096MB(Kit of 2) DS N/A Heat-Sink Package 5 • • •

BUFFALO FSX1066D2C-1G 1024MB DS N/A Heat-Sink Package 5-5-5-15

BUFFALO FSX1066D2C-K4G 2048MB DS N/A Heat-Sink Package 5-5-5-15 • • •

Elixir M2Y1G64TU8HC4B-BD 1024MB DS Elixir N2TU 51280CE-BD 6 • •

Kingbox N/A 1024MB DS MICRON 7YDI2 1.8 • • •

Mushkin 996612 2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.1 •

Mushkin 996619 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.0-2.1 • •

Patriot PVS24G8500ELK 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15

2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 • • •

4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 • •

4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.1 • •

SS/DSChip

Brand

Chip NO.

Timing Dimm(Bios)

(800-5-5-5-15)

(1066-5-5-5-15)

Voltage

2.1 •

DIMM socket support (Optional)

A* B* C*

•

Due to AM3/AM2+ CPU limitation, only one DDR2 1066 DIMM is supported per channel. When four DDR2 1066 DIMMs are installed, all DIMMs run at 800Mhz frequency by default

for system stability.

Chapter 1: Product introduction 1-11

DDR2-800MHz capability

Vendor Part No. Size

Apacer 78.91G9I.9K5 512MB SS APACER AM4B5708JQJS8E 5 • •

Apacer 78.01GA0.9K5 1024MB SS APACER AM4B5808CQJS8E 5 • • •

Apacer 78.01GA0.9L5 1024MB SS Apacer AM4B5808FEWS8E 5(800-5-5-5-18) • • •

Apacer 78.A1GA0.9K4 2048MB DS APACER AM4B5808CQJS8E 5 • •

Apacer 78.A1GA0.9L4 2048MB DS Apacer AM4B5808FEWS8E 5(800-5-5-5-18) • • •

CORSAIR CM2X1024-6400C4 1024MB DS N/A Heat-Sink Package 4 1.9 • • •

CORSAIR BoxP/N:TWIN2X4096-6400C4DHX

(CM2X2048-6400C4DHX)Ver1.1

CORSAIR BoxP/N:TWIN2X4096-6400C5

(CM2X2048-6400C5)Ver3.1

CORSAIR BoxP/N:TWIN2X4096-6400C5DHX

(CM2X2048-6400C5DHX)Ver4.1

Crucial BL12864AA80A.8FE5(EPP) 1024MB SS N/A Heat-Sink Package 4-4-4-12 2.0 • • •

Crucial BL25664AA80A.16FE5(EPP) 2048MB DS N/A Heat-Sink Package 4-4-4-12 2.0 • • •

G.SKILL F2-6400CL5D-1GBNQ 1024MB(Kit of 2) SS N/A Heat-Sink Package 5-5-5-15 1.8-2.0 • • •

G.SKILL F2-6400CL4D-2GBPK 1024MB DS Heat-Sink Package 4 • •

G.SKILL F2-6400PHU2-2GBNR 1024MB DS Heat-Sink Package 5 • • •

G.SKILL F2-6400CL4D-4GBPK 4096MB(Kit of 2) DS N/A Heat-Sink Package 4 2.0-2.1 • • •

G.SKILL F2-6400CL5D-4GBPQ 4096MB(Kit of 2) DS N/A Heat-Sink Package 5 1.8-1.9 • • •

G.SKILL F2-6400CL6D-4GBMQ 4096MB(Kit of 2) DS N/A Heat-Sink Package 6 1.8-1.9 • • •

G.SKILL F2-6400CL6D-8GBMQ 8192MB(Kit of 2) DS N/A Heat-Sink Package 6-6-6-18 1.8 • • •

GEIL GB22GB6400C4DC 2048MB(Kit of 2) DS GEIL GL2L64M088BA30EB 4-4-4-12 2.0 • • •

GEIL GB22GB6400C5DC 2048MB(Kit of 2) DS GEIL GL2L64M088BA30EB 5-5-5-15 1.8 • •

GEIL GE22GB800C4DC 2048MB(Kit of 2) DS N/A Heat-Sink Package 4-4-4-12 2.0 • • •

GEIL GE22GB800C5DC 2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 1.8 • • •

GEIL GX22GB6400DC 2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 1.8 • • •

GEIL GX22GB6400UDC 2048MB(Kit of 2) DS N/A Heat-Sink Package 4-4-4-12 2.1 • • •

GEIL GX22GB6400C4USC 2048MB DS N/A Heat-Sink Package • • •

GEIL GX22GB6400LX 2048MB DS N/A Heat-Sink Package 5-5-5-15 • • •

GEIL GB24GB6400C4DC 4096MB(Kit of 2) DS GEIL GL2L128M88BA25AB 4-4-4-12 2.0 • •

GEIL GB24GB6400C5DC 4096MB(Kit of 2) DS GEIL GL2L128M88BA25AB 5-5-5-15 1.8 • • •

GEIL GB24GB6400C5QC 4096MB(Kit of 2) DS GEIL GL2L64M088BA30EB 5-5-5-15 1.8 • • •

GEIL GE24GB800C4DC 4096MB(Kit of 2) DS N/A Heat-Sink Package 4-4-4-12 2.0 • • •

GEIL GE24GB800C5DC 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 1.8 • • •

GEIL GX24GB6400DC 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 1.8 • • •

GEIL GB24GB6400C4QC 4096MB(Kitof4) DS GEIL GL2L64M088BA30EB 4-4-4-12 2.0 • • •

GEIL GE24GB800C4QC 4096MB(Kitof4) DS N/A Heat-Sink Package 4-4-4-12 2.0 • • •

GEIL GE24GB800C5QC 4096MB(Kitof4) DS N/A Heat-Sink Package 5-5-5-15 1.8 • • •

GEIL GB28GB6400C4QC 8192MB(Kitof4) DS GEIL GL2L128M88BA25AB 4-4-4-12 2.0 • • •

GEIL GB28GB6400C5QC 8192MB(Kitof4) DS GEIL GL2L128M88BA25AB 5-5-5-15 1.8 • • •

GEIL GE28GB800C4QC 8192MB(Kitof4) DS N/A Heat-Sink Package 4-4-4-12 2.0 • • •

GEIL GE28GB800C5QC 8192MB(Kitof4) DS N/A Heat-Sink Package 5-5-5-15 1.8 • • •

Hynix HYMP564U64CP8-S5 512MB SS HYNIX HY5PS12821CFP-S5 5 1.8 • • •

Hynix HYMP112U64CP8-S6 1024MB SS HYNIX HY5PS1G831CFP-S6 6 • • •

Hynix HYMP 512U64CP8-S5 1024MB DS HY5PS12821CFP-S5 5 • •

KINGMAX KLDC28F-A8KI5 512MB SS KINGMAX KKA8FEIBF-HJK-25A • • •

KINGMAX KLDD48F-ABKI5 1024MB DS KINGMAX KKA8FEIBF-HJK-25A • • •

KINGMAX KLDE88F-B8KB5 2048MB DS KINGMAX KKB8FFBXF-CFA-25A • • •

KINGSTON KVR800D2N5/ 512 512MB SS ELPIDA E5108AJBG-8E-E 1.8 • • •

KINGSTON KVR800D2N6/ 512 512MB SS ELPIDA E5108AJBG-8E-E 1.8 • • •

KINGSTON KHX6400D2LLK2/1GN(EPP) 1024MB(Kit of 2) SS N/A Heat-Sink Package 4 2.0 • • •

KINGSTON KVR800D2N5/1G 1024MB SS KINGSTON D1288TEFCGL25U 800-5-5-5-18 1.8 • •

KINGSTON KVR800D2N5/1G 1024MB SS KINGSTON D1288TPFCGL25U 800-5-5-5-15 1.8 • • •

KINGSTON KHX6400D2LL/1G 1024MB DS N/A Heat-Sink Package 4 2.0 • • •

KINGSTON KVR800D2N6/1G 1024MB DS ELPIDA E5108AJBG-8E-E 1.8 • • •

KINGSTON KHX6400D2LLK2/2GN(EPP) 2048MB(Kit of 2) DS N/A Heat-Sink Package •

KINGSTON KHX6400D2/2G 2048MB DS N/A Heat-Sink Package 2.0 • • •

4096MB(Kit of 2) DS N/A Heat-Sink Package 4-4-4-12 2.10 • • •

4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-18 1.80 • • •

SS/DSChip

Brand

Chip NO.

Timing Dimm(Bios)

Voltage

DIMM socket support (Optional)

A* B* C*

1-12 ASUS M4A78-HTPC

DDR2-800MHz capability (continued)

Vendor Part No. Size

KINGSTON KVR800D2N6/4G 4096MB DS ELPIDA E2108ABSE-8G-E • • •

NANYA NT 512T64U88B0BY-25C 512MB SS NT5TU64M8BE-25C 5 • • •

NANYA NT1GT64U8HB0BY-25C 1024MB DS NT5TU64M8BE-25C 5 • • •

NANYA NT1GT64U8HCOBY-25D 1024MB DS NANYA NT5TU64M8CE-25D • • •

NANYA NT2GT64U8HC0BY-AC 2048MB DS NANYA NT5TU128M8CE-AC 5 • • •

OCZ OCZ2G8001G 1024MB DS N/A Heat-Sink Package 5 1.8 • •

OCZ OCZ2G8002GK 1024MB DS Heat-Sink Package 5 •

OCZ OCZ2T8002GK(EPP) 1024MB DS N/A Heat-Sink Package 5 1.8 • • •

OCZ OCZ2FX800C32GK 2048MB(Kit of 2) DS N/A Heat-Sink Package 3-4-4(800-5-5-

OCZ OCZ2P8004GK 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-4-4 1.8 • • •

OCZ OCZ2G8008GK 8192MB(Kit of 2) DS N/A Heat-Sink Package 5 1.80 • • •

OCZ OCZ2VU80016GQ 8192MB(Kit of 2) DS N/A Heat-Sink Package 5-6-6(800-5-5-

PSC AL7E8G73F-8E1 1024MB SS PSC P3R1GE3FGF850MAC19 5(800-5-5-

PSC AL8E8F73C-8E1 2048MB DS PSC A3R1GE3CFF734MAA0E 5 • • •

PSC AL8E8G73F-8E1 2048MB DS PSC P3R1GE3FGF850MAC19 5(800-5-5-

SAMSUNG M378T6553GZS-CF7 512MB SS SAMSUNG K4T51083QG 6 • • •

SAMSUNG M378T2863QZS-CF7 1024MB SS SAMSUNG K4T1G084QQ 6 • • •

SAMSUNG M391T2863QZ3-CF7 1024MB SS SAMSUNG K4T1G084QQ(ECC) 6 • • •

SAMSUNG M378T2953GZ3-CF7 1024MB DS SAMSUNG K4T51083QG 6 • • •

SAMSUNG M378T5663QZ3-CF7 2048MB DS SAMSUNG K4T1G084QQ(ECC) 6 • • •

SAMSUNG M391T5663QZ3-CF7 2048MB DS SAMSUNG K4T1G084QQ 6 • • •

SAMSUNG M378T5263AZ3-CF7 4096MB DS SAMSUNG K4T2G084QA-HCF7 6 • • •

Super

T800UA12C4 512MB SS Heat-Sink Package • • •

Talent

Super

T800UB1GC4 1024MB DS Heat-Sink Package • • •

Talent

Transcend JM800QLU-1G 1024MB SS Transcend TQ243ECF8 5 • • •

Transcend TS128MLQ64V8U 1024MB SS ELPIDA E1108ACBG-8E-E 5 • • •

Transcend JM800QLU-2G 2048MB DS Transcend TQ243PCF8 5 • • •

Transcend TS256MLQ64V8U 2048MB DS ELPIDA E1108ACBG-8E-E 5 • • •

Transcend TS256MLQ72V8U 2048MB DS ELPIDA E1108ACBG-8E-E(ECC) 5 • • •

Asint SLY2128M8-JGE 1024MB SS Asint DDRII1208-GE •

Asint SLZ2128M8-JGE 2048MB DS Asint DDRII1208-GE • • •

CENTURY 28V2H8 512MB SS HYNIX HY5PS12821BFP-S5 • •

CENTURY 28VOH8 1024MB DS HYNIX HY5PS12821BFP-S5 • • •

Elixir M2Y1G64TU88D4B-AC 1024MB SS Elixir N2TU1G80DE-AC 5 • • •

Elixir M2Y1G64TU8HB0B-25C 1024MB DS Elixir N2TU 51280BE-25C 5 1.8 • • •

Elixir M2Y2G64TU8HD4B-AC 2048MB DS Elixir N2TU1G80DE-AC 5 • • •

Kingbox N/A 2048MB DS Kingbox EPD2128082200E-3 800-5-5-5-15 • • •

Kingbox N/A 2048MB DS MICRON D9HNL • • •

Kingbox N/A 2048MB DS KINGBOX EPD2128082200E-3 • • •

Mushkin XP2-6400 1024MB SS Heat-Sink Package 4 • • •

Oci 04701G16CZ5D2A 1024MB DS Jnnity 64M8PC6400 5 • • •

Patriot PSD2 51280081 512MB SS PATRIOT PM64M8D2BU-25EC • • •

Patriot PSD21G8002 1024MB DS PATRIOT PM64M8D2BU-25PAC 5 • •

Patriot PSD22GB002 2048MB DS PATRIOT PM128M8D2BU-25KC 5 • • •

Patriot PDC24G6400LLK 4096MB(Kit of 2) DS N/A Heat-Sink Package 4-4-4-12 2.2 • • •

Silicon

SP001GBLRU800S02 1024MB SS S-POWER 10YR9N3 5(5-5-5-15) • • •

Power

Silicon

SP002GBLRU800S02 2048MB DS S-POWER 10YR9N3 5(5-5-5-15) •

Power

UMAX D48002GP1-73BEB 2048MB DS UMAX U2S24D30TP-8E 800-5-5-5-15 • • •

SS/DSChip

Brand

Chip NO.

Timing Dimm(Bios)

5-15)

5-18)

DIMM socket support (Optional)

Voltage

A* B* C*

2.35 • • •

1.8 • • •

• • •

Chapter 1: Product introduction 1-13

DDR2-667MHz capability

Vendor Part No. Size

Apacer 78.91G92.9K5 512MB SS APACER AM4B5708JQJS7E 5 • • •

Apacer 78.01G9O.9K5 1024MB SS APACER AM4B5808CQJS7E 5 • • •

Apacer 78.A1G9O.9K4 2048MB DS APACER AM4B5808CQJS7E 5 • • •

CORSAIR VS 512MB667D2 512MB SS N/A 64M8CFEG N/A N/A • • •

CORSAIR VS1GB667D2 1024MB DS N/A 64M8CFEG N/A N/A • • •

ELPIDA EBE51UD8AEFA-6E-E 512MB SS ELPIDA E5108AE-6E-E 5 1.7-1.9 • • •

G.SKILL F2-5400PHU2-2GBNT 2048MB(Kit of 2) DS G.Skill D264M8GCF 5-5-5-15 1.8 • • •

G.SKILL F2-5300CL5D-4GBMQ 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 1.8-1.9 • • •

GEIL GX21GB5300SX 1024MB DS N/A Heat-Sink Package • • •

GEIL GX22GB5300LX 2048MB DS N/A Heat-Sink Package 5-5-5-15 • • •

GEIL GX24GB5300LDC 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 1.8 • • •

Hynix HYMP112U64CP8-Y5 1024MB SS HYNIX HY5PS1G831CFP-Y5 5 • • •

Hynix HYMP 512U64CP8-Y5 1024MB DS HYNIX HY5PS12821CFP-Y5 5 1.8 • • •

KINGSTON KVR667D2N5/ 512 512MB SS KINGSTON D6408TR7CGL25U 667-5-5-5-15 1.8 • • •

KINGSTON KVR667D2N5/2G 2048MB SS SAMSUNG K4T1G084QE 667-5-5-5-15 1.8 • • •

KINGSTON KVR667/D2N5/1G 1024MB DS ELPIDA E5108AJBG-6E-E 667-5-5-5-15 1.8 • • •

KINGSTON KVR667D2E5/1G 1024MB DS ELPIDA

KINGSTON KVR667D2E5/2G 2048MB DS MICRON D9HNL(ECC) 1.8 • • •

KINGSTON KVR667D2N5/2G 2048MB DS KINGSTON D1288TPFCGL25U 667-5-5-5-15 1.8 • • •

NANYA NT 512T64U88B0BY-3C 512MB SS NANYA NT5TU64M8BE-3C 5 1.8 • • •

NANYA NT2GT64U8HB0JY-3C 2048MB DS NT5TU128M8BJ-3C 5 • • •

OCZ OCZ26671024V 1024MB SS Ramos RC1GT084CA0-53EC 5 1.8 • •

SAMSUNG M378T6553EZS-CE6 512MB SS SAMSUNG K4T51083QE 5 • • •

SAMSUNG M378T2953EZ3-CE6 1024MB DS SAMSUNG K4T51083QE 5 • • •

SAMSUNG M378T5263AZ3-CE6 4096MB DS SAMSUNG K4T2G084QA-HCE6 5 • • •

Super Talent T6UA 512C5 512MB SS N/A Heat-Sink Package 5 1.8 • • •

Super Talent T6UB1GC5 1024MB DS N/A Heat-Sink Package 5 1.8 • • •

TwinMOS 8D-23JK5M2ETP 512MB SS TwinMOS TMM6208G8M30C 5 1.8 • • •

Asint SLX264M8-J6E 512MB SS Asint DDRII6408-6E • • •

Asint SLY2128M8-J6E 1024MB SS Asint DDRII1208-6E • • •

CENTURY 26V2H8 512MB SS HYNIX HY5PS12821CFP-Y5 5 1.85 • • •

CENTURY 26VOH8 1024MB DS HYNIX HY5PS12821CFP-Y5 5 1.85 • • •

Dynet DNHM5U 512C8FE-A6 512MB SS Dynet DN5HS82CFE-A6 •

Kingbox N/A 1024MB SS KINGBOX EPD2128082200E-4 • • •

Kingbox N/A 1024MB DS KINGBOX EPD264082200E-4 1.8 • • •

Kingbox N/A 1024MB DS KINGBOX EPD264082200N-4 • • •

MDT M 512-667-8 512MB SS MDT 18D 51280D-30648 4 1.8 • • •

MDT M924-667-16 1024MB DS 18D 51280D-30646E 4 • •

MDT M924-667-16A 1024MB DS MDT 18D 51200D-30646 4 1.8 • • •

Patriot PSD21G6672 1024MB DS PATRIOT PM64M8D2BU-3PAC 5 • • •

SS/DSChip

Brand

Chip NO.

E5108AGBG-6E-

E(ECC)

Timing Dimm(Bios)

DIMM socket support (Optional)

Voltage

A* B* C*

1.8 • • •

Side(s): SS - Single-sided DS - Double-sided DIMM support:

• A*: Supports one module inserted into either slot as Single-channel memory

conguration.

• B*: Supports two modules inserted into either the yellow slots or the black slots as one

pair of Dual-channel memory conguration.

• C*: Supports four modules inserted into both the yellow slots and the black slots as two

pairs of Dual-channel memory conguration.

Visit the ASUS website for the latest QVL.

1-14 ASUS M4A78-HTPC

1.7.3 Installing a DIMM

Unplug the power supply before adding or removing DIMMs or other system components. Failure to do so can cause severe damage to both the motherboard and the components.

1. Press the retaining clips outward to

unlock a DDR2 DIMM socket.

2. Align a DIMM on the socket such that

the notch on the DIMM matches the break on the socket.

Unlocked retaining clip

A DDR2 DIMM is keyed with a notch so that it ts in only one direction. DO NOT force a

DIMM into a socket to avoid damaging the DIMM.

3. Firmly insert the DIMM into the socket until the retaining clips snap back in place and the DIMM is properly seated.

Locked Retaining Clip

1.7.4 Removing a DIMM

To remove a DIMM:

1. Simultaneously press the retaining clips outward to unlock the DIMM.

Support the DIMM lightly with your

ngers when pressing the retaining

clips. The DIMM might get damaged

when it ips out with extra force.

DDR2 DIMM notch

2. Remove the DIMM from the socket.

Chapter 1: Product introduction 1-15

DDR2 DIMM notch

1.8 Expansion slots

In the future, you may need to install expansion cards. The following sub-sections describe the slots and the expansion cards that they support.

Unplug the power cord before adding or removing expansion cards. Failure to do so may cause you physical injury and damage motherboard components.

1.8.1 Installing an expansion card

To install an expansion card:

1. Before installing the expansion card, read the documentation that came with it and make the necessary hardware settings for the card.

2. Remove the system unit cover (if your motherboard is already installed in a chassis).

3. Remove the bracket opposite the slot that you intend to use. Keep the screw for later use.

4. Align the card connector with the slot and press rmly until the card is completely

seated on the slot.

5. Secure the card to the chassis with the screw you removed earlier.

6. Replace the system cover.

1.8.2 Conguring an expansion card

After installing the expansion card, congure it by adjusting the software settings.

1. Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for

information on BIOS setup.

2. Assign an IRQ to the card.

3. Install the software drivers for the expansion card.

When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that

the cards do not need IRQ assignments. Otherwise, conicts will arise between the two PCI

groups, making the system unstable and the card inoperable. Refer to the table on the next page for details.

1.8.3 PCI slot

The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other cards that

comply with PCI specications.

1.8.4 PCI Express x1 slots

This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that

comply with the PCI Express specications.

1.8.5 PCI Express 2.0 x16 slot

This motherboard supports a PCI Express 2.0 x16 graphics card that complies with the PCI Express specications.

1-16 ASUS M4A78-HTPC

1.9 Jumpers

Clear RTC RAM (CLRTC)

This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords.

To erase the RTC RAM

1. Turn OFF the computer and unplug the power cord.

2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3 for about 5~10 seconds, then move the cap back to pins 1-2.

3. Plug the power cord and turn ON the computer.

4. Hold down the <Del> key during the boot process and enter BIOS setup to re-enter data.

Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default position. Removing the cap will cause system boot failure!

• If the steps above do not help, remove the onboard battery and move the jumper again to clear the CMOS RTC RAM data. After the CMOS clearance, reinstall the battery.

• You do not need to clear the RTC when the system hangs due to overclocking. For system failure due to overclocking, use the C.P.R. (CPU Parameter Recall) feature. Shut down and reboot the system so the BIOS can automatically reset parameter settings to default values.

• Due to the chipset behavior, AC power off is required to enable C.P.R. function. You must turn off and on the power supply or unplug and plug the power cord before rebooting the system.

Chapter 1: Product introduction 1-17

1.10 Connectors

1.10.1 Rear panel connectors

1. Coaxial S/PDIF Out port. This port connects an external audio output device via an

coaxial S/PDIF cable.

2. Video Graphics Adapter (VGA) port

VGA-compatible devices.

3. USB 2.0 ports 3 and 4.

These two 4-pin Universal Serial Bus (USB) ports are

available for connecting USB 2.0 devices.

4. LAN (RJ-45) port.

This port allows Gigabit connection to a Local Area Network (LAN)

through a network hub.

LAN port LED indications

Status Left LED Right LED

OFF OFF OFF

10 Mbps connection

100 Mbps connection OFF

1 Gbps connection OFF

Orange (blinking during data activity)

This 15-pin port is for a VGA monitor or other

Right

Left

LED

OFF

Orange (blinking during data activity)

Green (blinking during data activity)

LAN port

5. RCA Out port (right-channel). This port connects a receiver or a TV via an RCA

cable.

6. Center/Subwoofer port (orange).

7. Rear Speaker Out port (black).

This port connects the center/subwoofer speakers.

This port connects the rear speakers in a 4-channel,

6-channel, or 8-channel audio conguration.

8. Line In port (light blue).

This port connects the tape, CD, DVD player, or other audio

sources.

9. Line Out port (lime).

This port connects a headphone or a speaker. In 4-channel,

6-channel, and 8-channel conguration, the function of this port becomes Front Speaker Out.

10. Microphone port (pink).

11. Side Speaker Out port (gray).

This port connects a microphone.

This port connects the side speakers in an 8-channel

audio conguration.

Refer to the audio conguration table on next page for the function of the audio ports in 2, 4, 6, or 8-channel conguration.

1-18 ASUS M4A78-HTPC

Audio 2, 4, 6, or 8-channel conguration

Port

Light Blue Line In Line In Line In Line In

Lime Line Out Front Speaker Out Front Speaker Out Front Speaker Out

Pink Mic In Mic In Mic In Mic In

Orange – – Center/Subwoofer Center/Subwoofer

Black – Rear Speaker Out Rear Speaker Ou Rear Speaker Out

Gray – – – Side Speaker Out

12. RCA Out port (left-channel). This port connects a receiver or a TV via an RCA cable.

13. USB 2.0 ports 1 and 2.

14. External SATA port. This port connects an external Serial ATA hard disk drive.

Headset 2-channel

4-channel 6-channel 8-channel

These two 4-pin Universal Serial Bus (USB) ports are

available for connecting USB 2.0 devices.

• For RC edition, connect the IR receiver to USB 2.0 port 1 or 2 which supports with

power-on function.

• To disable the power-on function for USB 2.0 port 1 or 2, set the USB12 item to [Disabled] in the BIOS. When the Power on from USB12 item is set to [Enabled], connecting/disconnecting the USB devices to/from these two ports will power on the system. Refer to page 2-17 for details.

• The external SATA port supports external Serial ATA 3.0 Gb/s devices. Longer cables

support higher power requirements to deliver signal up to two meters away, and enables improved hot-swap function.

• Before using the External SATA port, ensure to set the

settings to [AHCI] and install the AHCI driver.

Power on from

OnChip SATA Type in the BIOS

DO NOT insert a different connector to this port.

15. DVI-I Out port. This port is for any DVI-I compatible device and are HDCP compliant,

allowing playback of HD DVD, Blu-Ray and other protected content.

16. HDMI Out port. This port is for a high-denition multimedia interface (HDMI) connector.

17. Optical S/PDIF Out port. This port connects an external audio output device via an

optical S/PDIF cable.

Chapter 1: Product introduction 1-19

Dual display table

This table indicates whether the dual display you want to use is supported or not.

Dual display output Support Not support

DVI + D-Sub •

HDMI + D-Sub •

DVI + HDMI •

Playback of HD DVD and Blu-Ray Discs

For better playback quality, we suggest that you follow the system requirements in the suggested list below.

Suggested list

CPU AMD® Athlon 4400+

DIMM DDR2 800 (1GB or higher)

BIOS setup Frame Buffer Size--256MB or higher

Playback software CyberLink® PowerDVD 7.3

File format

Non-protected clips 1920 x 1080p 1920 x 1080p

HD-DVD 1920 x 1080p 1280 x 1080p

Blu-Ray 1280 x 1080p 1280 x 1080p

Windows XP Windows Vista

Best resolution

1-20 ASUS M4A78-HTPC

Troubleshooting on HDTV overscaling or underscaling:

If your desktop is extending beyond the viewable display area or the desktop or image is not

lling the entire display area while using the onboard HDMI out port and the HDMI cable, you can resize the desktop appearing on your HDTV screen.

To resize your HDTV desktop:

1. Install

2. Right-click the desktop and select

3. From the

4. Click

5. Move the

AMD Chipset Driver from the motherboard support DVD.

ATI CATALYST(R) Control Center.

Graphics Settings tree, expand DTV (HDMI™) 1.

Scaling Options.

Underscan/Overscan slider to adjust the overall size of the display on the

HDMI™ DTV. Using this slider increases or decreases any black borders that may be visible around the outside of the display.

6. To ensure that forcing a custom display mode through the ATI Displays Manager does

not create conicting resolutions, select the Use the scaling values instead of the customized settings when the desktop resolution does not match your DFP resolution check box.

The Scaling Options function of the DTV (HDMI™) 1 item in the ATI CATALYST Control

Center is adjustable only when you are using an HDTV compliance resolution such as 480i, 720i, or 1080i.

Chapter 1: Product introduction 1-21

1.10.2 Internal connectors

1. CPU, Chassis and Power Fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN1–2, 3-pin PWR_FAN)

The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or a total of 1A~2.22A (26.64W max.) at +12V. Connect the fan cables to the fan connectors on the

motherboard, making sure that the black wire of each cable matches the ground pin of the connector.

Do not forget to connect the fan cables to the fan connectors. Insufcient air ow inside the

system may damage the motherboard components. These are not jumpers! DO NOT place jumper caps on the fan connectors.

Only the CPU_FAN and CHA_FAN1–2 connectors support the ASUS Q FAN 2 feature.

1-22 ASUS M4A78-HTPC

2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)

These connectors are for an ATX power supply. The plugs from the power supply are

designed to t these connectors in only one orientation. Find the proper orientation and push down rmly until the connectors completely t.

•

We recommend that you use an ATX 12 V Specication 2.0-compliant power supply unit (PSU) with a minimum of 300 W power rating. This PSU type has 24-pin and 4-pin

power plugs.

•

If you intend to use a PSU with 20-pin and 4-pin power plugs, ensure that the 20-pin power plug can provide at least 15 A on +12 V and that the PSU has a minimum power rating of 300 W. The system may become unstable or may not boot up if the power is

inadequate.

•

Do not forget to connect the 4-pin ATX +12 V power plug. Otherwise, the system will not

boot up.

• We recommend that you use a PSU with higher power output when conguring a

system with more power-consuming devices or when you intend to install additional devices. The system may become unstable or may not boot up if the power is inadequate.

•

If you are uncertain about the minimum power supply requirement for your system,

refer to the Recommended Power Supply Wattage Calculator at http://support.asus. com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.

Chapter 1: Product introduction 1-23

3. IDE connector (40-1 pin PRI_IDE)

The onboard IDE connector is for Ultra DMA 133/100/66 signal cable. There are three connectors on each Ultra DMA 133 / 100 / 66 signal cable: blue, black, and gray.

Connect the blue connector to the motherboard’s IDE connector, then select one of the

following modes to congure your devices:

Drive jumper setting Mode of device(s) Cable connector

Single device Cable-Select or Master - Black

Cable-Select

Two devices

Master Master

Slave Slave

• Pin 20 on the IDE connector is removed to match the covered hole on the Ultra DMA

cable connector. This prevents incorrect insertion when you connect the IDE cable.

• Use the 80-conductor IDE cable for Ultra DMA 133/100/66 IDE devices.

Master Black

Slave Gray

Black or gray

If any device jumper is set as “Cable-Select”, ensure that all other device jumpers have the same setting.

1-24 ASUS M4A78-HTPC

4. Serial ATA connectors (7-pin SATA1-5)

These connectors are for the Serial ATA signal cables for Serial ATA 3Gb/s hard disk and optical disk drives. The Serial ATA 3Gb/s is backward compatible with Serial ATA

1.5Gb/s specication. The data transfer rate of the Serial ATA 3Gb/s is faster than the standard parallel ATA with 133 MB/s (Ultra DMA133). If you install Serial ATA hard disk drives, you can create a RAID 0, RAID 1 or RAID 10 conguration through the onboard SB700 chipset.

Important note on Serial ATA

Install Windows® XP Service Pack 2 or later version before using Serial ATA.

• For detailed instructions on how to congure RAID 0, RAID 1 and RAID 10, refer to the

RAID manual in the support DVD.

• If you intend to create a Serial ATA RAID set using these connectors, set the

SATA Type item in the BIOS to [RAID]. See page 2-8 for details.

Chapter 1: Product introduction 1-25

OnChip

5. System panel connector (10-1 pin PANEL)

This connector supports several chassis-mounted functions.

•

System power LED (2-pin PLED)

This 2-pin connector is for the system power LED. Connect the chassis power LED

cable to this connector. The system power LED lights up when you turn on the system power, and blinks when the system is in sleep mode.

• Hard disk drive activity LED (2-pin IDE_LED)

This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable to this connector. The IDE LED lights up or ashes when data is read from or written to

the HDD.

• System warning speaker (4-pin SPEAKER)

This 4-pin connector is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings.

• ATX power button/soft-off button (2-pin PWRSR)

This connector is for the system power button. Pressing the power button turns the system on or puts the system in sleep or soft-off mode depending on the BIOS settings. Pressing the power switch for more than four seconds while the system is ON turns the system OFF.

• Reset button (2-pin RESET)

This 2-pin connector is for the chassis-mounted reset button for system reboot without

turning off the system power.

1-26 ASUS M4A78-HTPC

6. USB connectors (10-1 pin USB56, USB78, USB910)

These connectors are for USB 2.0 ports. Connect the USB module cable to any of

these connectors, then install the module to a slot opening at the back of the system

chassis. These USB connectors comply with USB 2.0 specication that supports up to 480 Mbps connection speed.

Never connect a 1394 cable to the USB connectors. Doing so will damage the

motherboard!

The USB 2.0 module is purchased separately.

7. Audio power connector (4-pin Audio_PWR)

This connector is for a 4-pin power plug from a power supply. Connect a power plug to this audio power connector for better sound quality.

Do not share the same power cable with other devices to reduce the electronic interruption.

Chapter 1: Product introduction 1-27

8. Optical drive audio in connector (4-pin CD)

This connector allows you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card.

9. Digital audio connector (4-1 pin SPDIF_OUT)

This connector is for an additional Sony/Philips Digital Interface (S/PDIF) ports.

The S/PDIF module is purchased separately.

1-28 ASUS M4A78-HTPC

10. Front panel audio connector (10-1 pin AAFP)

This connector is for a chassis-mounted front panel audio I/O module that supports either High Denition Audio or AC`97 audio standard. Connect one end of the front panel audio I/O module cable to this connector.

• We recommend that you connect a high-denition front panel audio module to this connector to avail of the motherboard high-denition audio capability.

• If you want to connect a high-denition front panel audio module to this connector, ensure that the Front Panel Select item in the BIOS is set to [HD]. If you want to connect an AC’97 front panel audio module to this connector, set the item to [AC97]. See page 2-20 for details.

Chapter 1: Product introduction 1-29

ASUS Q-Connector (system panel)

IDE_LED

POWER SW

RESET SW

IDE_LED-

IDE_LED+

PWR

Reset

Ground

You can use the ASUS Q-Connector to connect/disconnect chassis front panel cables in a

few steps. Refer to the instructions below to install the ASUS Q-Connector.

1. Connect the front panel cables to the ASUS Q-Connector.

Refer to the labels on the Q-Connector to

know the detailed pin denitions, then match

them to the respective front panel cable labels.

The labels of the front panel cables may differ from chassis made by different manufacturers.

2. Install the ASUS Q-Connector to the system

panel connector, making sure the orientation matches the labels on the motherboard.

3. The front panel functions are now enabled.

The gure shows the Q-Connector properly

installed on the motherboard.

1-30 ASUS M4A78-HTPC

1.11 Software support

1.11.1 Installing an operating system

This motherboard supports Windows® XP/Vista Operating Systems (OS). Always install the

latest OS version and corresponding updates to maximize the features of your hardware.

• Motherboard settings and hardware options vary. Use the setup procedures presented in this chapter for reference only. Refer to your OS documentation for detailed information.

• Ensure that you install Windows the drivers for better compatibility and system stability.

1.11.2 Support DVD information

The Support DVD that comes with the motherboard package contains the drivers, software applications, and utilities that you can install to avail all motherboard features.

• The contents of the Support DVD are subject to change at any time without notice. Visit the ASUS website at www.asus.com for updates.

• For detailed software instructions, see the download the latest software manual from the ASUS website at www.asus.com.

To run the Support DVD

Place the Support DVD to the optical drive. The DVD automatically displays the Drivers menu if Autorun is enabled in your computer.

The screen on the next page is used for reference only.

XP Service Pack 1 or later versions before installing

Manual menu in the Support DVD or

Click an icon to display Support DVD/ motherboard information

Click an item to install

If Autorun is NOT enabled in your computer, browse the contents of the Support DVD to

locate the le ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run

the DVD.

Chapter 1: Product introduction 1-31

1.11.3 ASUS Home Theater Gate

The ASUS Home Theater Gate, specially designed for the HTPC series, allows you to easily and quickly launch media applications to enjoy your music and movies. With the bundled remote controller, you can launch the ASUS Home Theater Gate and start media applications with just one touch.

Launching Home Theater Gate

1. Install Home Theater Gate from the motherboard support DVD.

2. To launch Home Theater Gate ,click

Theater Gate > ASUS Home Theater Gate v1.xx.xx. The Home Theater Gate main window appears.

Home Theater Gate main window

Click to minimize the Home Theater Gate window. Click the Home Theater

Gate icon in the Windows® notication area to restore the window

Click to return to the previous page

Start > All Programs > ASUS > ASUS Home

Click to close the Home Theater Gate window

Click to return to the main window

Allows you to view photos

Allows you to playback videos

Allows you to create your music playlists

Allows you to congure the

Silent Mode, Media Path Settings, Internet Radio Settings, and Favorite Music

Allows you to playback videos

Supported type

Resolution Normal display under 1024 x 600 – 1920 x 1080

Music mp3, midi, wav, wma and cda

Video avi, mp4, mpeg, rmvb, wmv, rm, mov, asf, mpg, vob and dat

Photo bmp, dib, gif, jpg, jpeg, png, tif, tiff

DTS Windows® Vista™ OS (HDMI and analog out only)

Video player

Music player Windows® Media Player, Winamp, KMPlayer, RealPlayer, iTunes

Visit the ASUS website at http://support.asus.com/download/download. aspx?SLanguage=en-us for the latest supported type.

1-32 ASUS M4A78-HTPC

Windows® Media Player, PowerDVD 8 (Cyberlink), WinDVD 9 (Corel/ InterVideo), KMPlayer, Media Player Classic and RealPlayer

Using the remote controller (RC Edition only)

Use the remote controller to launch the ASUS Home Theater Gate and start media applications.

Connect the IR receiver to the USB 2.0 port 1 or 2 before using the remote controller.

Power on/off*

Fast rewind

Stop

Previous track

Volume up

Scroll left

Main window

Switch windows

Internet Radio**

Music***

Mute

Play/Pause

Fast forward

Next track

Volume down

Scroll up

Scroll right

Scroll down

Full screen

Silent mode

DTS on/off

Launch Home Theater Gate/Minimize Home Theater Gate window

* This button follows the behavior of the system sleep button. Actual behavior of the system sleep

button can be customized in Windows® Control Panel > Power Options.

** Set up the internet radio channel 1 to 7 before using the Internet Radio.

*** Set the Favorite Music in the Settings or Music mode rst.

Chapter 1: Product introduction 1-33

1-34 ASUS M4A78-HTPC

Chapter 2

BIOS information

2.1 Managing and updating your BIOS

Save a copy of the original motherboard BIOS le to a USB ash disk in case you need to

restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update utility.

2.1.1 ASUS Update utility

The ASUS Update is a utility that allows you to manage, save, and update the motherboard BIOS in Windows® environment.

• ASUS Update requires an Internet connection either through a network or an Internet Service Provider (ISP).

• This utility is available in the support DVD that comes with the motherboard package.

Installing ASUS Update

To install ASUS Update:

1. Place the support DVD in the optical drive. The

2. Click the

3. Follow the onscreen instructions to complete the installation.

Utilities tab, and then click Install ASUS Update.

Quit all Windows® applications before you update the BIOS using this utility.

Drivers menu appears.

Updating the BIOS

To update the BIOS:

1. From the Windows

ASUSUpdate to launch the ASUS Update utility.

2. From the dropdown list, select any of the updating process:

Updating from the Internet

a. Select Update BIOS from the Internet, and then click Next.

b. Select the ASUS FTP site nearest you to avoid network trafc, or click

Select, and then click Next.

c. From the FTP site, select the BIOS version that you wish to download, and then

click Next.

The ASUS Update utility is capable of updating itself through the Internet. Always update the utility to avail all its features.

Chapter 2: BIOS setup 2-1

desktop, click Start > Programs > ASUS > ASUSUpdate >

Auto

Updating from a BIOS file

a. Select Update BIOS from a le, and then click Next.

b. Locate the BIOS le from the

Open window, and then click Open.

3. Follow the onscreen instructions to complete the updating process.

2.1.2 ASUS EZ Flash 2 utility

The ASUS EZ Flash 2 feature allows you to update the BIOS without having to use a bootable oppy disk or a DOS-based utility.

Before you start using this utility, download the latest BIOS from the ASUS website at www.asus.com.

To update the BIOS using EZ Flash 2:

1. Insert the USB ash disk that contains the latest BIOS le to the USB port, and then launch EZ Flash 2 in any of these two ways:

• Press <Alt> + <F2> during POST to display the following.

• Enter the BIOS setup program. Go to the

press <Enter> to enable it.a.

ASUSTek EZ Flash 2 BIOS ROM Utility V3.34

FLASH TYPE: MXIC 25L8005

Current ROM

BOARD: M4A78-HTPC VER: 0205 DATE: 02/25/2009

PATH: A:\

Tools menu to select EZ Flash 2 and

Update ROM

BOARD: Unknown VER: Unknown DATE: Unknown

Note

[Enter] Select or Load [Tab] Switch [V] Drive Info [Up/Down/Home/End] Move [B] Backup [Esc] Exit

2. Press <Tab> to switch between drives until the correct BIOS le is found. When the correct BIOS le is found, EZ Flash 2 performs the BIOS update process and

automatically reboots the system when done.

• This function can support devices such as a USB ash disk with FAT 32/16 format and

single partition only.

• DO NOT shut down or reset the system while updating the BIOS to prevent system boot failure!

Ensure to load the BIOS default settings to ensure system compatibility and stability. Select the Load Setup Defaults item under the Exit menu. See section 2.9 Exit Menu for details.

2-2 ASUS M4A78-HTPC

2.1.3 ASUS CrashFree BIOS 3 utility

The ASUS CrashFree BIOS 3 utility is an auto recovery tool that allows you to restore the

BIOS le when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS le using the motherboard support DVD or a USB ash drive that contains the BIOS le.

The BIOS le in the motherboard support DVD may be older than the BIOS le published on the ASUS ofcial website. If you want to use the newer BIOS le, download the le at support.asus.com and save it to a USB ash drive.

Recovering the BIOS

To recover the BIOS:

1. Turn on the system.

2. Insert the motherboard support DVD to the optical drive, or the USB ash drive containing the BIOS le to the USB port.

3. The utility automatically checks the devices for the BIOS le. When found, the utility reads the BIOS le and starts ashing the corrupted BIOS le.

4. Turn off the system after the utility completes the updating process and power on again.

5. The system requires you to enter BIOS Setup to recover BIOS setting. To ensure

system compatibility and stability, we recommend that you press <F2> to load default

BIOS values.

DO NOT shut down or reset the system while updating the BIOS! Doing so can cause system boot failure!

2.2 BIOS setup program

This motherboard supports a programmable rmware chip that you can update using the

provided utility described in section 2.1 Managing and updating your BIOS.

Use the BIOS Setup program when you are installing a motherboard, reconguring your system, or prompted to “Run Setup”. This section explains how to congure your system

using this utility.

Even if you are not prompted to use the Setup program, you can change the conguration of

your computer in the future. For example, you can enable the security password feature or

change the power management settings. This requires you to recongure your system using the BIOS Setup program so that the computer can recognize these changes and record them in the CMOS RAM of the rmware chip.

The rmware chip on the motherboard stores the Setup utility. When you start up the

computer, the system provides you with the opportunity to run this program. Press <Del> during the Power-On Self-Test (POST) to enter the Setup utility. Otherwise, POST continues with its test routines.

If you wish to enter Setup after POST, reboot the system by doing any of the following procedures:

• Restart using the OS standard shut-down procedure.

• Press

• Press the reset button on the system chassis.

<Ctrl>+<Alt>+<Del> simultaneously.

Chapter 2: BIOS setup 2-3

• Press the power button to turn the system off then back on.

Using the power button, reset button, or the <Ctrl>+<Alt>+<Del> keys to force reset from a running operating system can cause damage to your data or system. We recommend to always shut-down the system properly from the operating system.

The Setup program is designed to make it as easy to use as possible. Being a menu-driven program, it lets you scroll through the various submenus and make your selections from the available options using the navigation keys.

• The default BIOS settings for this motherboard apply for most conditions to ensure optimum performance. If the system becomes unstable after changing any BIOS settings, load the default settings to ensure system compatibility and stability. Select the Load Setups Default item under the Exit Menu. See section 2.9 Exit Menu.

• The BIOS setup screens shown in this section are for reference purposes only, and may not exactly match what you see on your screen.

• Visit the ASUS website at www.asus.com to download the latest BIOS le for this

motherboard.

2.2.1 BIOS menu screen

Menu items Menu bar Conguration elds General help

Main Advanced Power Boot Tools Exit

System Time [10:17:30] System Date [Tue 03/10/2009] Language [English]

SATA 1 :[Not Detected] SATA 3 :[Not Detected] SATA1 :[Not Detected] SATA2 :[Not Detected] SATA3 :[Not Detected] SATA4 :[Not Detected] SATA5 :[Not Detected] ESATA :[Not Detected]

 SATAConguration

System Information

BIOS SETUP UTILITY

Use [ENTER], [TAB] or [SHIFT-TAB] to

selectaeld.

Use [+] or [-] to

conguresystemTime.

←→ Select Screen ↑↓ Select Item

+- Change Field Tab Select Field F1 General Help F10 Save and Exit ESC Exit

Submenu items Navigation keys

2.2.2 Menu bar

The menu bar on top of the screen has the following main items:

Main For changing the basic system conguration

Advanced For changing the advanced system settings

Power For changing the advanced power management (APM) conguration

Boot For changing the system boot conguration

Tools For changing the system tools conguration

Exit For selecting the exit options and loading default settings

2-4 ASUS M4A78-HTPC

To select an item on the menu bar, press the right or left arrow key on the keyboard until the desired item is highlighted.

• The BIOS setup screens shown in this chapter are for reference purposes only, and may not exactly match what you see on your screen.

• Visit the ASUS website at www.asus.com to download the latest BIOS information.

2.2.3 Navigation keys

At the bottom right corner of a menu screen are the navigation keys for that particular menu. Use the navigation keys to select items in the menu and change the settings.

Some of the navigation keys differ from one screen to another.

2.2.4 Menu items

The highlighted item on the menu bar displays the specic items for that menu. For example,

selecting Main shows the Main menu items. The other items (Advanced, Power, Boot, Tools, and Exit) on the menu bar have their

respective menu items.

2.2.5 Submenu items

A solid triangle before each item on any menu screen means that the item has a submenu. To display the submenu, select the item and press <Enter>.

2.2.6 Conguration elds

These elds show the values for the menu items. If an item is user-congurable, you can change the value of the eld opposite the item. You cannot select an item that is not usercongurable.

A congurable eld is enclosed in brackets, and is highlighted when selected. To change the value of a eld, select it then press <Enter> to display a list of options. Refer to 2.2.8 Pop-up

window.

2.2.7 General help

At the top right corner of the menu screen is a brief description of the selected item.

2.2.8 Pop-up window

Select a menu item then press <Enter> to

display a pop-up window with the conguration

Main Advanced Power Boot Tools Exit

Suspend Mode [Auto] ACPI Version Features [Disabled] ACPI APIC support [Enabled]

APMConguration

Hardware Monitor

options for that item.

2.2.9 Scroll bar

A scroll bar appears on the right side of a menu screen when there are items that do not

t on the screen. Press the <Up> / <Down> arrow keys or <Page Up> /<Page Down> keys

to display the other items on the screen.

Chapter 2: BIOS setup 2-5

BIOS SETUP UTILITY

Disabled

Enabled

Scroll bar

Pop-up window

Use [ENTER], [TAB] or [SHIFT-TAB] to select

aeld.

Use [+] or [-] to

conguresystemTime.

←→ Select Screen ↑↓ Select Item

+- Change Field Tab Select Field F1 General Help F10 Save and Exit ESC Exit

2.3 Main menu

When you enter the BIOS Setup program, the Main menu screen appears, giving you an overview of the basic system information.

Refer to section 2.2.1 BIOS menu screen for information on the menu screen items and how to navigate through them.

Main Advanced Power Boot Tools Exit

System Time [10:17:30] System Date [Tue 03/10/2009] Language [English]

SATA 1 :[Not Detected] SATA 3 :[Not Detected] SATA1 :[Not Detected] SATA2 :[Not Detected] SATA3 :[Not Detected] SATA4 :[Not Detected] SATA5 :[Not Detected] ESATA :[Not Detected]

 SATAConguration

System Information

BIOS SETUP UTILITY

Use [ENTER], [TAB] or [SHIFT-TAB] to

selectaeld.

Use [+] or [-] to

conguresystemTime.

←→ Select Screen ↑↓ Select Item

+- Change Field Tab Select Field F1 General Help F10 Save and Exit ESC Exit

2.3.1 System Time [xx:xx:xx]

Allows you to set the system time.

2.3.2 System Date [Day xx/xx/xxxx]

Allows you to set the system date.

2.3.3 Language [English]

Allows you to select the display language for the BIOS setup screen.

Conguration options: [Chinese(BIG5)] [Chinese(GB)] [Français] [German] [English]

2.3.4 SATA 1/SATA 3

While entering Setup, the BIOS automatically detects the presence of IDE devices. There is a separate submenu for each IDE device. Select a device item then press <Enter> to display the IDE device information.

The BIOS automatically detects the values opposite the dimmed items (Device, Vendor, Size,

LBA Mode, Block Mode, PIO Mode, Async DMA, Ultra DMA, and SMART monitoring). These

values are not user-congurable. These items show Not Detected if no IDE device is installed

in the system.

Type [Auto]

Selects the type of IDE drive. Setting to [Auto] allows automatic selection of the appropriate IDE device type. Select [CDROM] if you are specically conguring a CD-ROM drive. Select [ARMD] (ATAPI Removable Media Device) if your device is either a ZIP, LS-120, or MO drive. Conguration options: [Not Installed] [Auto] [CDROM] [ARMD]

2-6 ASUS M4A78-HTPC

LBA/Large Mode [Auto]

Enables or disables the LBA mode. Setting to [Auto] enables the LBA mode if the device

supports this mode, and if the device was not previously formatted with LBA mode disabled.

Conguration options: [Disabled] [Auto]

Block (Multi-Sector Transfer) M [Auto]

Enables or disables data multi-sectors transfers. When set to [Auto], the data transfer from

and to the device occurs multiple sectors at a time if the device supports multi-sector transfer

feature. When set to [Disabled], the data transfer from and to the device occurs one sector at a time. Conguration options: [Disabled] [Auto]

PIO Mode [Auto]

Selects the PIO mode. Conguration options: [Auto] [0] [1] [2] [3] [4]

DMA Mode [Auto]

Selects the DMA mode. Conguration options: [Auto]

SMART Monitoring [Auto]

Sets the Smart Monitoring, Analysis, and Reporting Technology.

Conguration options: [Auto] [Disabled] [Enabled]

32Bit Data Transfer [Enabled]

Enables or disables 32-bit data transfer. Conguration options: [Disabled] [Enabled]

2.3.5 SATA 1–5/ESATA

While entering Setup, the BIOS automatically detects the presence of Serial ATA devices. There is a separate submenu for each SATA device. Select a device item then press <Enter> to display the SATA device information.

The BIOS automatically detects the values opposite the dimmed items (Device, Vendor, Size,

LBA Mode, Block Mode, PIO Mode, Async DMA, Ultra DMA, and SMART monitoring). These

values are not user-congurable. These items show Not Detected if no Serial ATA device is

installed in the system.

Type [Auto]

This item appears in SATA5 and ESATA only.

LBA/Large Mode [Auto]

Enables or disables the LBA mode. Setting to [Auto] enables the LBA mode if the device

supports this mode, and if the device was not previously formatted with LBA mode disabled.

Conguration options: [Disabled] [Auto]

Block (Multi-sector Transfer) M [Auto]

Enables or disables data multi-sectors transfers. When set to [Auto], the data transfer from

and to the device occurs multiple sectors at a time if the device supports multi-sector transfer

feature. When set to [Disabled], the data transfer from and to the device occurs one sector at a time. Conguration options: [Disabled] [Auto]

Chapter 2: BIOS setup 2-7

PIO Mode [Auto]

Selects the PIO mode.

Conguration options: [Auto] [0] [1] [2] [3] [4]

DMA Mode [Auto]

Selects the DMA mode.

Conguration options: [Auto]

SMART Monitoring [Auto]

Sets the Smart Monitoring, Analysis, and Reporting Technology.

Conguration options: [Auto] [Disabled] [Enabled]

32Bit Data Transfer [Enabled]

Enables or disables 32-bit data transfer. Conguration options: [Disabled] [Enabled]

2.3.6 SATA Conguration

This menu allows you to congure the SATA devices.

OnChip SATA Channel [Enabled]

Enables or disables the OnChip SATA Channel.

Conguration options: [Enabled] [Disabled]

OnChip SATA Type [IDE]

This item appears only when you set the OnChip SATA Channel item to [Enabled] and allows you to select the SATA type. Conguration options: [IDE] [RAID] [AHCI]

• If you want the Serial ATA hard disk drives to use the Advanced Host Controller Interface

(AHCI), set this item to [AHCI]. The AHCI allows the onboard storage driver to enable

advanced Serial ATA features that increases storage performance on random workloads

by allowing the drive to internally optimize the order of commands.

• When SATA is congured as [AHCI] in BIOS, only SATA ports 1–4 can be detected in BIOS. Ensure to install the AHCI driver to detect and use SATA ports 1–5 and ESTA port

in AHCI mode under OS.

• If you want to create a RAID 0, RAID 1, and RAID 10 conguration from the Serial ATA hard disk drives, set this item to [RAID].

2.3.7 System Information

This menu gives you an overview of the general system specications. The BIOS

automatically detects the items in this menu.

BIOS Information

Displays the auto-detected BIOS information.

Processor

Displays the auto-detected CPU specication.

System Memory

Displays the auto-detected system memory.

2-8 ASUS M4A78-HTPC

2.4 Advanced menu

The Advanced menu items allow you to change the settings for the CPU and other system devices.

Be cautious when changing the settings of the Advanced menu items. Incorrect eld values

can cause the system to malfunction.

Main Advanced Power Boot Tools Exit

 JumperFreeConguration  CPUConguration

Chipset

 OnboardDevicesConguration

PCIPnP

 USBConguration

BIOS SETUP UTILITY

Adjust System Frequency/Voltage etc.

←→ Select Screen ↑↓ Select Item

Enter Go to Sub Screen F1 General Help F10 Save and Exit ESC Exit

2.4.1 JumperFree Conguration

The items in this menu allows you to congure overclocking-related items.

CPU OverClocking [Auto]

Allows selection of CPU overclocking options to achieve desired CPU internal frequency.

Conguration options: [Auto] [Manual] [Overclock Prole]

CPU/HT Reference Clock (MHz) [xxx]

This item appears only when you set the CPU OverClocking item to [Manual] and allows you to manually set the CPU/HT Reference clock. Use the <+> and <-> keys to

adjust the value. You can also type the desired value using the numeric keypad. The

values range from 200 to 550.

Overclock Options [Auto]

This item appears only when you set the CPU OverClocking item to [Overclock Prole] and allows you to adjust the overclock percentage.

Conguration options: [Auto] [Overclock 2%] [Overclock 5%] [Overclock 8%] [Overclock 10%]

GPU OverClocking [Auto]

Allows selection of GPU overclocking options to achieve desired GPU internal frequency.

Conguration options: [Auto] [Manual]

GPU Engine Clock [xxx]

This item appears only when you set the GPU OverClocking item to [Manual] and allows you to manually set the GPU engine clock. Use the <+> and <-> keys to adjust the value. You can also type the desired value using the numeric keypad. The values

range from 500 to 999.

PCIE OverClocking [Auto]

Allows selection of PCIE overclocking options. Conguration options: [Auto] [Manual]

Chapter 2: BIOS setup 2-9

PCIE Clock [xxx]

This item appears only when you set the PCIE OverClocking item to [Manual] and allows you to manually set the PCIE frequency. Use the <+> and <-> keys to adjust the value. You can also type the desired value using the numeric keypad. The values

range from 100 to 150.

Processor Frequency Multiplier [Auto]

Allows you to adjust the ratio between CPU Core Clock and FSB Frequency.

Conguration options: [Auto] [x8.0 1600 MHz] [x8.5 1700 MHz] [x9.0 1800 MHz] [x9.5 1900 MHz] [x10.0 2000 MHz] [x10.5 2100 MHz] [x11.0 2200 MHz] [x11.5 2300 MHz]

Processor Voltage [Auto]

Allows you to set the CPU VCore voltage.

Conguration options: [Auto] [+ 50mv] [+ 100mv] [- 100mv]

Processor-NB Voltage [Auto]

Allows you to set the voltage between the CPU and Northbridge.

Conguration options: [Auto] [+ 50mv] [+ 100mv] [- 100mv]

Hyper Transport Speed [Auto]

Allows you to set the CPU-Northbridge HyperTransport link speed.

Conguration options: [200 MHz] [400 MHz] [600 MHz] [800 MHz] [1 GHz] [1.2 GHz] [1.4 GHz] [1.6 GHz] [1.8 GHz] [Auto]

Hyper Transport Width [Auto]

Allows you to set the CPU-Northbridge HyperTransport link width.

Conguration options: [Auto] [4 Bit] [8 Bit] [16 Bit]

Memory Clock Mode [Auto]

Allows you to select the DRAM frequency control method.

Conguration options: [Auto] [Manual]

Memclock Value [xxx]

This item appears only when you set the Memory Clock Mode item to [Manual] and allows you to manually set the DRAM frequency.

Conguration options: [667MHz] [800MHz] [1067MHz]

DRAM Timing Mode [Auto]

Allows selection of the DRAM Timing Mode.

Conguration options: [Auto] [Both]

The following sub-items appear only when you set the DRAM Timing Mode item to [Both].

CAS Latency (CL) [Auto]

Conguration options: [Auto] [3 CLK] [4 CLK] [5 CLK] [6 CLK] [7 CLK DH_Only]

TRCD [Auto]

Conguration options: [3 CLK] [4 CLK] [5 CLK] [6 CLK] [Auto]

TRP [Auto]

Conguration options: [3 CLK] [4 CLK] [5 CLK] [6 CLK] [Auto]

2-10 ASUS M4A78-HTPC

tRTP [Auto]

Conguration options: [Auto] [2-4 CLK] [3-5 CLK]

TRAS [Auto]

Conguration options: [5 CLK] [6 CLK] – [17 CLK] [18 CLK] [Auto]

TRC [Auto]

Conguration options: [11 CLK] [12 CLK] – [25 CLK] [26 CLK] [Auto]

tWR [Auto]

Conguration options: [Auto] [3 CLK] [4 CLK] [5 CLK] [6 CLK]

TRRD [Auto]

Conguration options: [2 CLK] [3 CLK] [4 CLK] [5 CLK] [Auto]

tWTR [Auto]

Species the write to read delay when accessing the same DIMM. Conguration options: [1 CLK] [2 CLK] [3 CLK] [Auto]

tRFC0 [Auto]

Conguration options: [Auto] [75ns] [105ns] [127.5ns] [195ns] [327.5ns]

tRFC1 [Auto]

Conguration options: [Auto] [75ns] [105ns] [127.5ns] [195ns] [327.5ns]

tRFC2 [Auto]

Conguration options: [Auto] [75ns] [105ns] [127.5ns] [195ns] [327.5ns]

tRFC3 [Auto]

Conguration options: [Auto] [75ns] [105ns] [127.5ns] [195ns] [327.5ns]

Memory OverVoltage [Auto]

Allows you to set the DRAM voltage.

Conguration options: [Auto] [0mv] [+ 100mv] [+ 200mv] [+ 300mv]

Chipset OverVoltage [Auto]

Allows you to set the DRAM voltage.

Conguration options: [Auto] [+ 50mv] [+ 100mv] [+ 150mv]

DCT0/DCT1 Strength Cong [Auto]

Allows adjustments of the advanced DRAM strength parameters.

Conguration options: [Auto] [DCT 0] [DCT 1] [Both]

The following sub-items appear only when you set the DCT0/DCT1 Strength Cong. item

to [DCT 0] or [Both].

DCT0:CKE drive strength [Auto]

Conguration options: [Auto] [1x] [1.25x] [1.5x] [2x]

DCT0:CS/ODT drive strength [Auto]

Conguration options: [Auto] [1x] [1.25x] [1.5x] [2x]

DCT0:Address/Command drive str [Auto]

Conguration options: [Auto] [1x] [1.25x] [1.5x] [2x]

Chapter 2: BIOS setup 2-11

DCT0:MEMCLK drive strength [Auto]

Conguration options: [Auto] [0.75x] [1x] [1.25x] [1.5x]

DCT0:Data drive strength [Auto]

Conguration options: [Auto] [0.75x] [1x] [1.25x] [1.5x]

DCT0:DQS drive strength [Auto]

Conguration options: [Auto] [0.75x] [1x] [1.25x] [1.5x]

DCT0:Processor on-die terminat [Auto]

Conguration options: [Auto] [300 ohms +/- 20%] [150 ohms +/- 20%] [75 ohms +/- 20%]

The following sub-items appear only when you set the DCT0/DCT1 Strength Cong. item

to [DCT 1] or [Both].

DCT1:CKE drive strength [Auto]

Conguration options: [Auto] [1x] [1.25x] [1.5x] [2x]

DCT1:CS/ODT drive strength [Auto]

Conguration options: [Auto] [1x] [1.25x] [1.5x] [2x]

DCT1:Address/Command drive str [Auto]

Conguration options: [Auto] [1x] [1.25x] [1.5x] [2x]

DCT1:MEMCLK drive strength [Auto]

Conguration options: [Auto] [0.75x] [1x] [1.25x] [1.5x]

DCT1:Data drive strength [Auto]

Conguration options: [Auto] [0.75x] [1x] [1.25x] [1.5x]

DCT1:DQS drive strength [Auto]

Conguration options: [Auto] [0.75x] [1x] [1.25x] [1.5x]

DCT1:Processor on-die terminat [Auto]

Conguration options: [Auto] [300 ohms +/- 20%] [150 ohms +/- 20%] [75 ohms +/- 20%]

2.4.2 CPU Conguration

The items in this menu show the CPU-related information that the BIOS automatically detects.

GART Error Reporting [Disabled]

This option should remain disabled for the normal operation. The driver developer may

enable it for testing purpose. Conguration options: [Disabled] [Enabled]

Microcode Updation [Enabled]

Allows you to enable or disable the microcode updation.

Conguration options: [Disabled] [Enabled]

Secure Virtual Machine Mode [Enabled]

Allows you to enable or disable the AMD Secure Virtual Machine mode (SVM).

Conguration options: [Disabled] [Enabled]

2-12 ASUS M4A78-HTPC

Cool ’n’ Quiet [Enabled]

Enables or disables the AMD Cool’n’Quiet function.

Conguration options: [Disabled] [Enabled]

CPU Prefetching [Enabled]

Allows you to enable or disable CPU prefetching.

Conguration options: [Enabled] [Disabled]

C1E Conguration [Auto]

Allows you to enable or disable the Enhanced Halt State support.

Conguration options: [Auto] [Disabled]

2.4.3 Chipset

The Chipset menu allows you to change the advanced chipset settings. Select an item then press <Enter> to display the submenu.

NorthBridge Conguration

Memory Conguration

Bank Interleaving [Auto]

Allows you to enable or disable the bank memory interleaving.

Conguration options: [Disabled] [Auto]

Channel Interleaving [Disabled]

Allows you to set the channel interleaving mode.

Conguration options: [Disabled] [Address bits 6] [Address bits 12] [XOR of Address bits [20:16, 6] [XOR of Address bits [20:16, 9]]

Enable Clock to All DIMMs [Disabled]

Allows you to enable the unused clocks to all DIMMs even if the memory slots are not

populated. Conguration options: [Disabled] [Enabled]

MemClk Tristate C3/ATLVID [Disabled]

Allows you to enable or disable MemClk Tri-Stating during C3 and Alt VID.

Conguration options: [Disabled] [Enabled]

Memory Hole Remapping [Enabled]

Allows you to enable or disable memory remapping around memory hole.

Conguration options: [Disabled] [Enabled]

DCT Unganged Mode [Auto]

Allows selection of the unganged DRAM mode.

Conguration options: [Auto] [Always]

Power Down Enable [Enabled]

Allows you to enable or disable the DDR power down mode.

Conguration options: [Disabled] [Enabled]

Chapter 2: BIOS setup 2-13

ECC Conguration

ECC Mode [Disabled]

Disables or sets the DRAM ECC mode that allows the hardware to report and

correct memory errors. Set this item to [Basic], [Good], or [Max] to allow ECC mode auto-adjustment. Set this item to [Super] to adjust the DRAM BG Scrub sub-item manually. You may also adjust all sub-items by setting this item to [User]. Conguration options: [Disabled] [Basic] [Good] [Super] [Max] [User]

DRAM ECC Enable [Enabled]

Set this item to [Enabled] to allow hardware to report and correct memory errors automatically, maintaining system integrity. Conguration options: [Disabled] [Enabled]

DRAM SCRUB REDIRECT [Enabled]

Enables or disables the DRAM SCRUB REDIRECT feature that allows the system to correct the

DRAM ECC errors immediately when they occur. Conguration options: [Disabled] [Enabled]

4-Bit ECC Mode [Enabled]

Enables or disables the ECC chip kill feature. Conguration options: [Disabled] [Enabled]

DRAM BG Scrub [Disabled]

Disables or sets the DRAM BG Scrub.

Conguration options: [Disabled] [40ns] [80ns] [160ns] [320ns] [640ns] [1.28us] [2.56us] [5.12us] [10.2us] [20.5us] [41.0us] [81.9us] [163.8us] [327.7us] [655.4us] [1.31ms] [2.62ms] [5.24ms] [10.49ms] [20.97ms] [42.00ms] [84.00ms]

Data Cache BG Scrub [Disabled]

Disables or sets the Data Cache BG Scrub. This item allows the L1 Data Cache RAM to be corrected when idle.

L2/L3 Cache BG Scrub [Disabled]

Disables or sets the L2/L3 Cache BG Scrub. This item allows the L2/L3 Data Cache RAM to be

corrected when idle.

Alternate VID [Auto]

Allows you to speciffy the alternate VID while in low power states Use the <+> and <-> keys to adjust the value.

Internal Graphics

This menu allows you to change the onboard graphics conguration settings. Select an item

then press <Enter> to display the sub-menu.

Primary Display Adapter [PCI-E]

Allows you to select the graphics controller to use as the primary boot device.

Conguration options: [PCI-E] [PCI] [Onboard]

UMA Frame Buffer Size [Auto]

Conguration options: [Auto] [32MB] [64MB] [128MB] [256MB] [512MB]

Surround View [Auto]

If you set the PCI Express device as the primary display and enable this item, you may use

the internal graphics as the secondary display. Conguration options: [Disabled] [Auto]

2-14 ASUS M4A78-HTPC

CPU Spread Spectrum [Enabled]

Set to [Disabled] to enhance FSB overclocking ability or [Enabled] for EMI control. Conguration options: [Disabled] [Enabled]

PCIE Spread Spectrum [Enabled]

Set to [Disabled] to enhance PCIE overclocking ability or [Enabled] for EMI control. Conguration options: [Disabled] [Enabled]

2.4.4 Onboard Devices Conguration

HD Audio Controller [Enabled]

Allows you to enable or disable the HD Audio controller.

Conguration options: [Disabled] [Enabled]

Front Panel Select [HD Audio]

Allows you to set the front panel audio connector (AAFP) mode to legacy AC’97 or highdenition audio depending on the audio standard that the front panel audio module supports. Conguration options: [AC97] [HD Audio]

RCA Audio [Disabled]

Allows you to enable or disable the RCA audio output controller under Windows® Vista™ OS. Under Windows® XP, RCA audio output is always set to [Disabled].

Conguration options: [Disabled] [Enabled]

Onboard LAN Controller [Enabled]

Allows you to enable or disable the onboard LAN. Conguration options: [Enabled] [Disabled]

Onboard LAN Boot ROM [Disabled]

Allows you to enable or disable the onboard LAN Boot ROM.

Conguration options: [Disabled] [Enabled]

2.4.5 PCIPnP

The PCI PnP menu items allow you to change the advanced settings for PCI/PnP devices.

Plug And Play O/S [No]

When set to [No], BIOS congures all the devices in the system. When set to [Yes] and if you install a Plug and Play operating system, the operating system congures the Plug and Play devices not required for boot. Conguration options: [No] [Yes]

2.4.6 USB Conguration

The items in this menu allows you to change the USB-related features. Select an item then press <Enter> to display the conguration options.

The Module Version and USB Devices Enabled items show the auto-detected values. If no USB device is detected, the item shows None.

USB Functions [Enable]

Allows you to enable or disable the USB Functions. Conguration options: [Enabled] [Disabled]

Chapter 2: BIOS setup 2-15

USB 2.0 Controller [Enable]

Allows you to enable or disable the USB 2.0 controller. Conguration options: [Enabled] [Disabled]

Legacy USB Support [Auto]

Allows you to enable or disable support for USB devices on legacy operating systems (OS). Setting to Auto allows the system to detect the presence of USB devices at startup. If detected, the USB controller legacy mode is enabled. If no USB device is detected, the

legacy USB support is disabled. Conguration options: [Disabled] [Enabled] [Auto]

USB 2.0 Controller Mode [HiSpeed]

Allows you to congure the USB 2.0 controller in HiSpeed (480 Mbps) or Full Speed (12 Mbps). Conguration options: [FullSpeed] [HiSpeed]

2.5 Power menu

The Power menu items allow you to change the settings for the Advanced Conguration and Power Interface (ACPI) and the Advanced Power Management (APM). Select an item then press <Enter> to display the conguration options.

Main Advanced Power Boot Tools Exit

Suspend Mode [Auto] ACPI 2.0 Support [Disabled] ACPI APIC support [Enabled]

 APMConguration

Hardware Monitor

BIOS SETUP UTILITY

Select the ACPI state used for System Suspend.

←→ Select Screen ↑↓ Select Item

+- Change Option F1 General Help F10 Save and Exit ESC Exit

2.5.1 Suspend Mode [Auto]

Allows you to select the Advanced Conguration and Power Interface (ACPI) state to be used

for system suspend.

[S1(POS) Only] - Enables the system to enter the ACPI S1 (Power on Suspend) sleep state.

[S3 Only] - Enables the system to enter the ACPI S3 (Suspend to RAM) sleep state (default).

[Auto] - Detected by OS.

2-16 ASUS M4A78-HTPC

In S1 sleep state, the system appears suspended and stays in a low power mode. The system can be resumed at any time.

In S3 sleep state, the system appears to be off and consumes less power than in the S1 state. When signaled by a wake-up device or event, the system resumes to its working state exactly where it was left off.

2.5.2 ACPI 2.0 Support [Disabled]

Allows you to add more tables for Advanced Conguration and Power Interface (ACPI) 2.0 specications. Conguration options: [Disabled] [Enabled]

2.5.3 ACPI APIC Support [Enabled]

Allows you to enable or disable the Advanced Conguration and Power Interface (ACPI) support in the Application-Specic Integrated Circuit (ASIC). When set to Enabled, the ACPI

APIC table pointer is included in the RSDT pointer list.

Conguration options: [Disabled] [Enabled]

2.5.4 APM Conguration

Restore on AC Power Loss [Power Off]

When set to Power Off, the system goes into off state after an AC power loss. When set to Power On, the system goes on after an AC power loss.

Conguration options: [Power On] [Power Off] [Last State]

Power On By PCI/PCIE devices [Disabled]

Allows you to enable or sisable the PCI/PCIE devices to generate a wake event. Conguration options: [Disabled] [Enabled]

Power On By USB 12 [Disabled]

Allows you to enable or disable the USB devices connected to USB port 1 or 2 to generate a wake event. Conguration options: [Disabled] [Enabled]

Power On By RTC Alarm [Disabled]

Allows you to enable or disable RTC to generate a wake event. When this item is set to

[Enabled], the items RTC Alarm Date and RTC Alarm Time appear with set values. Conguration options: [Disabled] [Enabled]

Power LED [On]

Allows you to turn on or off the standby power LED. Conguration options: [On] [Off]

Audio PWR Reminder [Enabled]

When the system detects that no power cable is plugged in the audio power connector, a reminder will appear during POST. This item allows you to enable or disable this function.

Conguration options: [Enabled] [Disabled]

2.5.5 Hardware Monitor

CPU/MB Temperature [xxxºC/xxxºF]

The onboard hardware monitor automatically detects and displays the motherboard and CPU

temperatures. Select [Ignored] if you do not wish to display the detected temperatures.

CPU Fan / Chassis Fan / Chassis Fan 2 / Power Fan Speed [xxxxRPM] or [Ignored]

The onboard hardware monitor automatically detects and displays the CPU, chassis, and power fan speed in rotations per minute (RPM). If the fan is not connected to the motherboard,

the eld shows N/A. Select [Ignored] if you do not wish to display the detected speed.

VCORE / 3.3V / 5V / 12V Voltage

The onboard hardware monitor automatically detects the voltage output through the onboard voltage regulators. Select Ignored if you do not wish to display the detected voltage output.

Chapter 2: BIOS setup 2-17

CPU Q-Fan Function [Enabled]

Allows you to enable or disable the CPU Q-Fan feature that smartly adjusts the fan speeds

for more efcient system operation. Conguration options: [Disabled] [Enabled]

Select Fan Type: [PWM Fan]

This item appears only when you set the CPU Q-Fan Function item to [Enabled] and allows you to select the CPU fan type you installed on the motherboard.

Conguration options: [PWM Fan] [DC Fan]

• If you install a PWM (4-pin) fan but set this item to [DC Fan], the fan you installed may

not work.

• If you install a DC (3-pin) fan but set this item to [PWM Fan], the CPU Q-Fan function

will not work, and the fan you install will always run at full speed.

CPU Q-Fan Mode [Silent]

Allows you to set the appropriate performance level of the CPU Q-Fan. When set to

[Optimal], the CPU fan automatically adjusts depending on the CPU temperature. Set this item to [Silent] to minimize fan speed for quiet CPU fan operation, or [Performance] to achieve the maximum CPU fan speed. Conguration options: [Performance] [Optimal] [Silent]

Chassis Q-Fan Function [Enabled]

Allows you to enable or disable the chassis Q-Fan feature that smartly adjusts the fan speeds

for more efcient system operation. Conguration options: [Disabled] [Enabled]

Chassis Q-Fan Mode [Silent]

Allows you to set the appropriate performance level of the Chassis Q-Fan. When set to [Optimal],

the Chassis fan automatically adjusts depending on the Chassis temperature. Set this item to

[Silent] to minimize fan speed for quiet Chassis fan operation, or [Performance] to achieve the maximum Chassis fan speed. Conguration options: [Performance] [Optimal] [Silent]

2.6 Boot menu

The Boot menu items allow you to change the system boot options. Select an item then press <Enter> to display the submenu.

Main Advanced Power Boot Tools Exit

Boot Settings

Boot Device Priority

 BootSettingsConguration

Security

2-18 ASUS M4A78-HTPC

BIOS SETUP UTILITY

SpeciestheBoot

Device Priority sequence.

Avirtualoppydisk

drive (Floppy Drive B: ) may appear when you set the CD-ROM drive

astherstboot

device.

←→ Select Screen ↑↓ Select Item

Enter Go to Sub Screen F1 General Help F10 Save and Exit ESC Exit

2.6.1 Boot Device Priority

1st ~ xxth Boot Device

These items specify the boot device priority sequence from the available devices. The number of device items that appears on the screen depends on the number of devices installed in the system.

Conguration options: [Removable Dev.] [Hard Drive] [ATAPI CD-ROM] [Disabled]

2.6.2 Boot Settings Conguration

Quick Boot [Enabled]

Enabling this item allows the BIOS to skip some power on self tests (POST) while booting to decrease the time needed to boot the system. When set to [Disabled], BIOS performs all the

POST items. Conguration options: [Disabled] [Enabled]

Full Screen Logo [Enabled]

This allows you to enable or disable the full screen logo display feature.

Conguration options: [Disabled] [Enabled]

Set this item to [Enabled] to use the ASUS MyLogo 2™ feature.

AddOn ROM Display Mode [Force BIOS]

Sets the display mode for option ROM. Conguration options: [Force BIOS] [Keep Current]

Bootup Num-Lock [On]

Allows you to select the power-on state for the NumLock. Conguration options: [Off] [On]

Wait for ‘F1’ If Error [Enabled]

When set to [Enabled], the system waits for the F1 key to be pressed when error occurs. Conguration options: [Disabled] [Enabled]

Hit ‘DEL’ Message Display [Enabled]

When set to [Enabled], the system displays the message Press DEL to run Setup during POST. Conguration options: [Disabled] [Enabled]

2.6.3 Security

The Security menu items allow you to change the system security settings. Select an item then press <Enter> to display the conguration options.

Change Supervisor Password

Select this item to set or change the supervisor password. The Supervisor Password item on top of the screen shows the default Not Installed. After you set a password, this item shows Installed.

To set a Supervisor Password

1. Select the Change Supervisor Password item and press <Enter>.

2. From the password box, type a password composed of at least six letters and/or

numbers, then press <Enter>.

3. Conrm the password when prompted.

Chapter 2: BIOS setup 2-19

The message “Password Installed” appears after you successfully set your password. To change the supervisor password, follow the same steps as in setting a supervisor

password. To clear the supervisor password, select the Change Supervisor Password then press

<Enter>. The message “Password Uninstalled” appears.

If you forget your BIOS password, you can clear it by erasing the CMOS Real Time Clock (RTC) RAM. See section 1.9 Jumpers for information on how to erase the RTC RAM.

After you have set a supervisor password, the other items appear to allow you to change other security settings.

User Access Level [Full Access]

This item allows you to select the access restriction to the Setup items.

Conguration options: [No Access] [View Only] [Limited] [Full Access]

No Access prevents user access to the Setup utility.

View Only allows access but does not allow change to any eld.

Limited allows changes only to selected elds, such as Date and Time.

Full Access allows viewing and changing all the elds in the Setup utility.

Change User Password

Select this item to set or change the user password. The User Password item on top of the screen shows the default Not Installed. After you set a password, this item shows Installed.

To set a User Password:

1. Select the Change User Password item and press <Enter>.

2. On the password box that appears, type a password composed of at least six letters

and/or numbers, then press <Enter>.

3. Conrm the password when prompted.

The message “Password Installed” appears after you set your password successfully. To change the user password, follow the same steps as in setting a user password.

Clear User Password

Select this item to clear the user password.

Password Check [Setup]

When set to [Setup], BIOS checks for user password when accessing the Setup utility. When set to [Always], BIOS checks for user password both when accessing Setup and booting the

system. Conguration options: [Setup] [Always]

2-20 ASUS M4A78-HTPC

2.7 Tools menu

Main Advanced Power Boot Tools Exit

ASUS EZ Flash 2

Express Gate [Auto] Enter OS Timer [10 Seconds] Reset User Data [No]

AI NET 2

2.7.1 ASUS EZ Flash 2

Allows you to run ASUS EZ Flash 2. When you press <OK>, a conrmation message appears. Use the left/right arrow key to select between [Yes] or [No], then press <OK> to conrm your choice.

2.7.2 Express Gate [Auto]

Allows you to enable or disable the ASUS Express Gate feature. The ASUS Express Gate feature is a unique instant-on environment that provides quick access to the Internet browser

and Skype. Conguration options: [Auto] [Enabled] [Disabled]

Enter OS Timer [10 Seconds]

Sets countdown duration that the system waits at the Express Gate’s rst screen before starting Windows or other installed OS. Choose [Prompt User] to stay at the rst screen of Express Gate for user action. Conguration options: [Prompt User] [1 second] [3 seconds] [5 seconds] [10 seconds] [15 seconds] [20 seconds] [30 seconds]

BIOS SETUP UTILITY

Press ENTER to run the utility to select and update BIOS. This utility supports

1.FAT 12/16/32 (r/w)

2.NTFS (read only)

3.CD-DISC (read only)

←→ Select Screen ↑↓ Select Item

Enter Go to Sub Screen F1 General Help F10 Save and Exit ESC Exit

Reset User Data [No]

Allows you to clear Express Gate’s user data. Conguration options: [No] [Reset] When setting this item to [Reset], make sure to save the setting to the BIOS so that the

user data will be cleared the next time you enter the Express Gate. User data includes the Express Gate’s settings as well as any personal information stored by the web browser (bookmarks, cookies, browsing history, etc.). This is useful in the rare case where corrupt settings prevent the Express Gate environment from launching properly.

The rst time wizard will run again when you enter the Express Gate environment after

clearing its settings.

2.7.3 AI NET 2

Check Atheros LAN cable [Disabled]

Enables or disables checking of the Atheros LAN cable during the Power-On Self-Test

(POST). Conguration options: [Disabled] [Enabled]

Chapter 2: BIOS setup 2-21

2.8 Exit menu

The Exit menu items allow you to load the optimal or failsafe default values for the BIOS items, and save or discard your changes to the BIOS items.

Main Advanced Power Boot Tools Exit

Exit Options

Exit & Save Changes Exit & Discard Changes Discard Changes

Load Setup Defaults

Pressing <Esc> does not immediately exit this menu. Select one of the options from this

menu or <F10> from the legend bar to exit.

Exit & Save Changes

Once you are nished making your selections, choose this option from the Exit menu to

ensure the values you selected are saved to the CMOS RAM. An onboard backup battery sustains the CMOS RAM so it stays on even when the PC is turned off. When you select this option, a conrmation window appears. Select OK to save changes and exit.

If you attempt to exit the Setup program without saving your changes, the program prompts you with a message asking if you want to save your changes before exiting. Press <Enter> to save the changes while exiting.

BIOS SETUP UTILITY

Exit system setup after saving the changes.

F10 key can be used for this operation.

←→ Select Screen ↑↓ Select Item

Enter Go to Sub Screen F1 General Help F10 Save and Exit ESC Exit

Exit & Discard Changes

Select this option only if you do not want to save the changes that you made to the

Setup program. If you made changes to elds other than System Date, System Time, and Password, the BIOS asks for a conrmation before exiting.

Discard Changes

This option allows you to discard the selections you made and restore the previously saved

values. After selecting this option, a conrmation appears. Select OK to discard any changes

and load the previously saved values.

Load Setup Defaults

This option allows you to load the default values for each of the parameters on the Setup

menus. When you select this option or if you press <F5>, a conrmation window appears.

Select OK to load default values. Select Exit & Save Changes or make other changes before saving the values to the non-volatile RAM.

2-22 ASUS M4A78-HTPC

ASUS M4A78-HTPC RC, M4A78-HTPC User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Notices

Safety information

About this guide

1.1 Welcome!

1.2 Package contents

1.3 Special features

1.3.1 Product highlights

1.3.2 Innovative ASUS 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 Central Processing Unit (CPU)

1.6.1 Installing the CPU

1.6.2 Installing the heatsink and fan

1.7 System memory

1.7.1 Overview

1.7.3 Installing a DIMM

1.7.4 Removing a DIMM

1.8 Expansion slots

1.8.1 Installing an expansion card

1.8.3 PCI slot

1.8.4 PCI Express x1 slots

1.8.5 PCI Express 2.0 x16 slot

1.9 Jumpers

1.10 Connectors

1.10.1 Rear panel connectors

1.10.2 Internal connectors

1.11 Software support

1.11.1 Installing an operating system

1.11.2 Support DVD information

1.11.3 ASUS Home Theater Gate

2.1 Managing and updating your BIOS

2.1.1 ASUS Update utility

2.1.2 ASUS EZ Flash 2 utility

2.1.3 ASUS CrashFree BIOS 3 utility

2.2 BIOS setup program

2.2.1 BIOS menu screen

2.2.2 Menu bar

2.2.3 Navigation keys

2.2.4 Menu items

2.2.5 Submenu items

2.2.7 General help

2.2.8 Pop-up window

2.2.9 Scroll bar

2.3 Main menu

2.3.1 System Time [xx:xx:xx]

2.3.2 System Date [Day xx/xx/xxxx]

2.3.3 Language [English]

2.3.4 SATA 1/SATA 3

2.3.5 SATA 1–5/ESATA

2.3.7 System Information

2.4 Advanced menu

2.4.3 Chipset

2.4.5 PCIPnP

2.5 Power menu

2.5.1 Suspend Mode [Auto]

2.5.2 ACPI 2.0 Support [Disabled]

2.5.3 ACPI APIC Support [Enabled]

2.5.5 Hardware Monitor

2.6 Boot menu

2.6.1 Boot Device Priority

2.6.3 Security

2.7 Tools menu

2.7.1 ASUS EZ Flash 2

2.7.2 Express Gate [Auto]

2.7.3 AI NET 2

2.8 Exit menu