ASUS M4A785D-M PRO User Manual

Motherboard

M4A785D-M PRO

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ii

Copyright © 2009 ASUSTeK Computer Inc. All Rights Reserved.

No part of this manual, including the products and software described in it, may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any
means, except documentation kept by the purchaser for backup purposes, without the express written
permission of ASUSTeK Computer Inc. (“ASUS”).

Product warranty or service will not be extended if: (1) the product is repaired, 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.

E4711

First Edition V1

June 2009

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iii

Contents

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

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

About this guide ....................................................................................... viii

M4A785D-M PRO specications summary ............................................... ix

Chapter 1: Product introduction

1.1 Welcome! ...................................................................................... 1-1

1.2 Package contents ......................................................................... 1-1

1.3 Special features ............................................................................ 1-1

1.3.1 Product highlights ........................................................... 1-1

1.3.2 Innovative ASUS features ............................................... 1-3

1.4 Before you proceed ..................................................................... 1-4

1.5 Motherboard overview ................................................................. 1-5

1.5.1 Placement direction ........................................................ 1-5

1.5.2 Screw holes .................................................................... 1-5

1.5.3 Motherboard layout ......................................................... 1-6

1.5.4 Layout contents ............................................................... 1-6

1.6 Central Processing Unit (CPU) ................................................... 1-7

1.6.1 Installing the CPU ........................................................... 1-7

1.6.2 Installing the heatsink and fan ........................................ 1-9

1.7 System memory ......................................................................... 1-10

1.7.1 Overview ....................................................................... 1-10

1.7.2 Memory congurations ...................................................1-11

1.7.3 Installing a DIMM .......................................................... 1-18

1.7.4 Removing a DIMM ........................................................ 1-18

1.8 Expansion slots .......................................................................... 1-19

1.8.1 Installing an expansion card ......................................... 1-19

1.8.2 Conguring an expansion card ..................................... 1-19

1.8.3 PCI slots ........................................................................ 1-19

1.8.4 PCI Express x1 slot ....................................................... 1-19

1.8.5 PCI Express x16 slot ..................................................... 1-19

1.9 Jumpers ...................................................................................... 1-20

1.10 Connectors ................................................................................. 1-21

1.10.1 Rear panel connectors .................................................. 1-21

1.10.2 Internal connectors ....................................................... 1-24

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iv

Contents

1.11 Software support ........................................................................ 1-30

1.11.1 Installing an operating system ...................................... 1-30

1.11.2 Support DVD information .............................................. 1-30

Chapter 2: BIOS information

2.1 Managing and updating your BIOS ............................................ 2-1

2.1.1 ASUS Update utility ........................................................ 2-1

2.1.2 ASUS EZ Flash 2 utility ................................................... 2-2

2.1.3 ASUS CrashFree BIOS 3 utility ...................................... 2-3

2.2 BIOS setup program .................................................................... 2-4

2.2.1 BIOS menu screen .......................................................... 2-5

2.2.2 Menu bar ......................................................................... 2-5

2.2.3 Navigation keys ............................................................... 2-6

2.2.4 Menu items ..................................................................... 2-6

2.2.5 Sub-menu items .............................................................. 2-6

2.2.6 Conguration elds ......................................................... 2-6

2.2.7 General help ................................................................... 2-6

2.2.8 Pop-up window ............................................................... 2-6

2.2.9 Scroll bar ......................................................................... 2-6

2.3 Main menu .................................................................................... 2-7

2.3.1 System Time ................................................................... 2-7

2.3.2 System Date ................................................................... 2-7

2.3.3 Primary IDE Master/Slave, SATA 1-3, 5-6, and E-SATA . 2-7

2.3.4 SATA Conguration ......................................................... 2-8

2.3.5 System Information ......................................................... 2-9

2.4 Advanced menu ........................................................................... 2-9

2.4.1 JumperFree Conguration .............................................. 2-9

2.4.2 CPU Conguration ........................................................ 2-12

2.4.3 Chipset .......................................................................... 2-13

2.4.4 Onboard Devices Conguration .................................... 2-14

2.4.5 PCI PnP ........................................................................ 2-15

2.4.6 USB Conguration ........................................................ 2-15

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

2.5.1 Suspend Mode ............................................................. 2-16

2.5.2 ACPI 2.0 Support ......................................................... 2-16

2.5.3 ACPI APIC Support ...................................................... 2-16

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v

Contents

2.5.4 APM Conguration ........................................................ 2-16

2.5.5 HW Monitor Conguration ............................................. 2-17

2.6 Boot menu .................................................................................. 2-17

2.6.1 Boot Device Priority ...................................................... 2-18

2.6.2 Boot Settings Conguration .......................................... 2-18

2.6.3 Security ......................................................................... 2-18

2.7 Tools menu ................................................................................. 2-20

2.7.1 ASUS EZ Flash 2 .......................................................... 2-20

2.7.2 Express Gate ............................................................... 2-20

2.7.3 AI NET 2........................................................................ 2-20

2.8 Exit menu .................................................................................... 2-21

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vi

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.

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.

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.

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.

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 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.

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vii

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.

This motherboard should only be used in environments with ambient temperatures between
5℃ (14℉) and 40℃ (104℉).

•

Place the product on a stable surface.

•

If you encounter technical problems with the product, contact a qualied service

technician or your retailer.

Safety information

Electrical safety

• To prevent electric shock hazard, disconnect the power cable from the electric outlet

before relocating the system.

•

When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.

•

Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.

•

Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.

• Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.

• If the power supply is broken, do not try to x it by yourself. Contact a qualied service

technician or your retailer.

• The optical S/PDIF is an optional component (may or may not be included in your

motherboard) and is dened as a CLASS 1 LASER PRODUCT.

INVISIBLE LASER RADIATION, AVOID EXPOSURE TO BEAM.

• Never dispose of the battery in re. It could explode and release harmful substances into

the environment.

• Never dispose of the battery with your regular household waste. Take it to a hazardous

material collection point.

• Never replace the battery with an incorrect battery type.

• RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.

• DISPOSE OF USED BATTERIES ACCORDING TO THE ABOVE BATTERY-RELATED
INSTRUCTIONS.

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viii

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.

Conventions used in this guide

To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.

Typography

Bold text Indicates a menu or an item to select.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>

DANGER/WARNING: Information to prevent injury to yourselfInformation to prevent injury to yourself

when trying to complete a task.

CAUTION: Information to prevent damage to the componentsInformation to prevent damage to the components

when trying to complete a task.

NOTE: Tips and additional information to help you complete a task.Tips and additional information to help you complete a task.

IMPORTANT: Instructions that you MUST follow to complete a task.

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 information

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

Detailed descriptions of the BIOS parameters are also provided.

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ix

CPU AMD Phenom™II / Athlon™ II / Phenom™/ Athlon ™ /Sempron™

family processors (AM3 / AM2+ / AM2)
Supports 45nm CPU

AMD Cool ‘n’ Quiet™ Technology (depending on CPU type)
Supports CPU up to 125W

Chipset AMD 785G/SB710
System bus Up to 5200 MT/s HyperTransport™ 3.0 interface for AM2+ / AM3 CPU

2000 / 1600 MT/s for AM2 CPU

Memory Dual-channel memory architecture

4 x 240-pin DIMM slots support unbuffered ECC and non-ECC
DDR2 1200 (O.C.)*/1066/800/667MHz memory modules

Supports up to 16GB system memory

* We recommend that you install the DDR2 1200 DIMMs on the

blue slots for better performance.

** DDR2 1200 (O.C.)/1066 is supported by AM3/AM2+ CPU only.
** Due to AM3/AM2+ CPU limitation, only one DDR2 1200 (O.C.)

/1066 is supported per channel.

** Refer to www.asus.com for the latest Memory QVL.
*** Due to the memory address limitation on 32-bit Windows OS,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.

Graphics Integrated ATI Radeon HD4200 supports:

- maximum shared memory of 512MB

- DVI-D with HDCP compliant with max. resolution 2560x1600
@60Hz dual-link

- HDMI™ Technology with max. resolution up to 1920x1200 (1080P)
@60Hz

- RGB with max. resolution 2560x1440 @75Hz

Hybrid CrossFireX™ support (for Windows Vista only)
Supports Microsoft® DirectX 10.1, OpenGL 2.0, Shader Model 4.1,

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

Dual VGA output supports:

- RGB & DVI

- RGB & HDMI

* Refer to www.amd.com for the Hybrid CrossFireX selected GPUs.
** To playback the HD-DVD and Blu-ray Disc, we recommend system

conguration above graphic shared memory 256MB / Dual-Core
CPU minimum 1GB memory of Dual-channel DDR2 667 or single­channel DDR2 800.

Expansion slots 1 x PCI Express™ 2.0 x16 slot

1 x PCI Express™ x1 slot

2 x PCI 2.2 slots

Storage / RAID 1 x UltraDMA 133/100/66 connector

5 x Serial ATA 3Gb/s connectors support RAID 0, RAID 1, RAID
0+1, and JBOD congurations
1 x External SATA 3Gb/s supports RAID 0, RAID 1, RAID

0+1, and JBOD congurations

M4A785D-M PRO specications summary

(continued on the next page)

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x

M4A785D-M PRO specications summary

Audio VT1708S High Denition Audio 8-channel CODEC

Supports Jack-detection, Multi-streaming, Single SPDIF Out,
Anti-pop Function and Front Panel Retasking (HD only)
Supports S/PDIF out port at back I/O

USB Supports up to 12 USB 2.0/1.1 ports (6 ports at mid-board,

6 ports at back panel)

LAN Realtek 8112L PCIe Gigabit LAN
BIOS 8Mb Flash ROM, AMI BIOS, PnP, DMI2.0, WfM2.0, ACPI2.0a, SM

BIOS 2.5

ASUS special
features

ASUS 4+1 Phase Power Design
ASUS EPU-4 Engine
ASUS Express Gate
ASUS Turbo Key
ASUS GPU NOS
ASUS CrashFree BIOS 3
ASUS EZ Flash 2
ASUS Q-Fan

ASUS MyLogo 2
ASUS AI NET 2

Back panel I/O
ports

1 x PS/2 Keyboard/Mouse Combo port
1 x Optical S/PDIF Out port
1 x D-Sub port
1 x DVI port
1 x HDMI port
1 x External SATA port
1 x RJ45 port
6 x USB 2.0/1.1 ports
8-channel Audio I/O ports

Internal I/O
connectors

3 x USB 2.0/1.1 connectors support additional 6 USB 2.0/1.1 ports
5 x SATA connectors
1x CPU/Chassis/Power Fan connectors
1 x High Denition front panel audio connector
1 x S/PDIF Out connector
1 x IDE connector
1 x COM connector
1 x Parallel port
1 x system panel connector

24-pin ATX power connector
4-pin ATX 12V power connector

Accessories 2 x Serial ATA cables

1 x UltraDMA 133/100/66 cable
1x IO Shield
User manual

Support DVD Drivers

ASUS Update
ASUS PC Probe II
Anti-Virus software (OEM version)

Form Factor MicroATX form factor: 9.6’’ x 9.6’’ (24.4cm x 24.4cm)

*Specications are subject to change without notice.

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ASUS M4A785D-M PRO 1-1

1.1 Welcome!

Thank you for buying an ASUS® M4A785D-M PRO 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.

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

1.2 Package contents

Check your motherboard package for the following items.

Motherboard ASUS M4A785D-M PRO motherboard

Cables 2 x Serial ATA cables

1 x Ultra DMA 133/100/66 cable

Accessories 1 x I/O shield

Application DVD ASUS motherboard support DVD

Documentation User guide

Chapter 1

Product introduction

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

This 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® Phenom™ II / Athlon™II / Sempron™ 100 Series
processors

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 HyperTransport™ 3.0

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

1.3 Special features

1.3.1 Product highlights

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1-2 Chapter 1: Product introduction

AMD 785G/SB710 chipset is designed to support up to 5200MT/s
HyperTransport™ 3.0 (HT3.0) interface speed and PCI Express™ 2.0 x
16 graphics. It is optimized with AMD’s latest AM3 and multi-core CPUs to

provide excellent system performance and overclocking capabilities.

HyperTransport™ 3.0 support

HyperTransport™ 3.0 technology provides 2.6 times more bandwidth than
HT1.0 that radically improves system efciency for a smoother, faster

computing environment.

AMD® Hybrid CrossFireX Technology

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

• Hybrid CrossFireX is supported by Windows Vista OS only.

• Visit www.amd.com for the Hybird CrossFireX selected GPUs.

AMD Cool ‘n’ Quiet Technology

The motherboard supports the AMD Cool ‘n’ Quiet Technology, which

monitors system operation and automatically adjusts CPU voltage and
frequency for a cool and quiet operating environment.

DDR2 1200 O.C.

This motherboard supports DDR2 1200 (O.C.) that provides faster

data transfer rate and more bandwidth to increase memory computing

efciency, enhancing system performance in 3D graphics and other

memory demanding applications.

Gigabit LAN solution

The onboard LAN controller is a highly integrated Gb LAN controller. It is

enhanced with an ACPI management function to provide efcient power

management for advanced operating systems.

HDMI/DVI/RGB support

This motherboard supports multiple digital and analog display output
interfaces: HDMI, DVI, and D-Sub. With such diversity of display outputs,
you are able to choose and upgrade display devices freely.

HDMI support

HDMI (High-Denition Multimedia Interface) is the rst and only industry-

supported, uncompressed, all digital and video interface via a single cable
and is HDCP compliant allowing playback of HD DVD, Blu-ray disc, and
other protected content. The interface of this motherboard supports dual
VGA output for both HDMI/DVI and RGB.

Serial ATA 3Gb/s technology

The motherboard supports hard drives based on the SATA 3Gb/s storage

specication, delivering enhanced scalability and doubling the bus

bandwidth for high-speed data saving and retrieval.

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ASUS M4A785D-M PRO 1-3

1.3.2 Innovative ASUS features

ASUS Express Gate

Express Gate is a unique OS built into the motherboard. Five seconds
after bootup, you can instantly surf the Internet without entering the
Windows® OS.

• ASUS Express Gate supports le uploading from SATA HDDs, ODDs, and USB
drives. It supports le downloading to USB devices only.

• The actrual boot time is subject to hardware conguration and product models.

• Express Gate complies with the OpenGL standard. Refer to http://support.asus.com
for Express Gate source codes.

ASUS EPU

The ASUS EPU (Energy Processing Unit) provides total system
power management by detecting current PC loadings and intelligently
moderating power usage for critical PC components in real-time-helping
save power and money!

Turbo Key

ASUS Turbo Key allows you to turn the PC power button into
an overclocking button. After the easy setup, Turbo Key boosts
performances without interrupting ongoing work or games, simply through
pressing the button.

ASUS GPU NOS support

ASUS GPU NOS technology intelligently detects graphics loading
and automatically boosts performance for the most demanding tasks.
It provides you with a faster reaction time for an excellent graphics
performance.

SATA-On-The-Go

The external SATA port located at the back I/O provides smart setup and
hot-plug functions. Easily backup photos, videos and other entertainment
contents to external devices.

High Denition Audio

The onboard 8-channel VT1708S High Denition Audio CODEC enables

high-quality audio that automatically detects peripherals plugged into the
audio I/O jacks. VT1708S also supports the Windows® Vista Premium OS.

S/PDIF digital sound ready

This motherboard provides convenient connectivity to external home
theater audio systems via the optical S/PDIF (SONY-PHILIPS Digital
Interface) Out jack. It allows digital audio transferring without converting it
to analog format, and therefore well preserves singnal quality.

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1-4 Chapter 1: Product introduction

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.

• Use a grounded wrist strap or touch a safely grounded object or a metal object, such
as the power supply case, before handling components 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, ensure that the ATX power supply is
switched off or the power cord is detached from the power supply. Failure to do so may
cause severe damage to the motherboard, peripherals, or components.

AI NET2

AI NET2 remotely detects cable connection the second you turn on the

system, and any faulty connections are reported back up to 100 meters at
1 meter accuracy.

ASUS MyLogo2™

Turn your favorite photos into 256-color boot logos to personalize your

system.

ASUS CrashFree BIOS 3

ASUS CrashFree BIOS 3 is an auto-recovery tool that allows you to

restore a corrupted BIOS le using the bundled support DVD or USB
ash disk that contains the BIOS le.

ASUS EZ Flash 2

ASUS EZ Flash 2 is a utility that allows you to update the BIOS without
using a bootable oppy disk or an OS-based utility.

Green ASUS

This motherboard and its packaging comply with the European Union’s
Restriction on the use of Hazardous Substances (RoHS). This is in line

with the ASUS vision of creating environment-friendly and recyclable

products/packaging to safeguard consumers’ health while minimizing the

impact on the environment.

CPU Parameter Recall (C.P.R)

The BIOS C.P.R. feature automatically restores the CPU default settings
when the system hangs due to overclocking failure. C.P.R. eliminates the
need to open the system chassis and clear the RTC data. Simply shut
down and reboot the system, and the BIOS automatically restores the
CPU parameters to their default settings.

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ASUS M4A785D-M PRO 1-5

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.

Do not overtighten the screws! Doing so can damage the motherboard.

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.

Place this side towards
the rear of the chassis.

1.5.2 Screw holes

Place eight screws into the holes indicated by circles to secure the motherboard to the
chassis.

1.5 Motherboard overview

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1-6 Chapter 1: Product introduction

1.5.3 Motherboard layout

Connectors/Jumpers/Slots Page Connectors/Jumpers/Slots Page

1. CPU, chassis, and power fan connectors (4-pin
CPU_FAN, 3-pin CHA_FAN, 3-pin PWR_FAN)

1-29 8. Onboard LED 1-5

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

1-24 9. Clear RTC RAM (CLRTC) 1-20

3. AMD CPU socket 1-7 10. System panel connector (20-8 pin PANEL) 1-27

4. DDR2 DIMM sockets 1-10 11. Serial ATA connectors (7-pin SATA1, SATA2,

SATA3, SATA5, SATA6)

1-26

5. Serial port connectors (10-1 pin COM1) 1-29 12. USB connectors (10-1 pin USB78, USB910,

USB1112)

1-28

6. LPT connector (26-1 pin LPT) 1-26 13. Digital audio connector (4-1 pin SPDIF_OUT) 1-25

7. IDE connector (40-1 pin PRI_IDE) 1-25 14. Front panel audio connector (10-1 pin AAFP) 1-28

1.5.4 Layout contents

E4711_M4A785D-M PRO.indb 6 7/6/09 9:09:37 AM

ASUS M4A785D-M PRO 1-7

1.6 Central Processing Unit (CPU)

The motherboard comes with an AM2+ / AM2 socket designed for Phenom™ II /
Athlon™ II / Phenom™ / Athlon™/ Sempron™ family processors (AM3 / AM2+ / AM2).

The AM3/AM2/AM2+ socket has a different pinout from the 940-pin socket designed for the
AMD Opteron™ processor. Use a CPU that is designed for the AM3/AM2/AM2+ socket.

1.6.1 Installing the CPU

To install a CPU:

1. Locate the CPU socket on the motherboard.

Make sure that the socket lever is lifted up to

a 90º angle; otherwise, the CPU will not t in

completely.

2. Unlock the socket by pressing the lever

sideways, then lift it up to a 90º angle.

Socket lever

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.

Gold triangle

Small triangle

E4711_M4A785D-M PRO.indb 7 7/6/09 9:09:42 AM

1-8 Chapter 1: Product introduction

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.

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.

E4711_M4A785D-M PRO.indb 8 7/6/09 9:09:44 AM

ASUS M4A785D-M PRO 1-9

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 bracket lock

Retention Module Base

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.

1

3

4

5

2

E4711_M4A785D-M PRO.indb 9 7/6/09 9:09:46 AM

1-10 Chapter 1: Product introduction

1.7 System memory

1.7.1 Overview

The motherboard comes with four 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

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.

E4711_M4A785D-M PRO.indb 10 7/6/09 9:09:47 AM

ASUS M4A785D-M PRO 1-11

1.7.2 Memory congurations

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

the DIMM sockets.

M4A785D-M PRO Motherboard Qualied Vendors Lists (QVL)

• 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 do any of the
following:

- Use a maximum of 3GB system memory if you are using a 32-bit WindowsUse a maximum of 3GB system memory if you are using a 32-bit Windows® OS.

- Install a 64-bit WindowsWindows® OS when you want to install 4GB or more memory on
the motherboard.

• This motherboard does not support DIMMs made up of 256 megabits (Mb) chips or less.

The motherboard supports up to 16GB memory modules on Windows® XP Professional x64
and Vista x64 editions. You may install a maximum of 4 GB DIMMs on each slot.

(continued on the next page)

DDR2-1200MHz capability

Vendor Part No. Size

SS/
DS

Chip Brand Chip No.

Timing

DIMM

(BIOS)

Voltage

DIMM

Support

A* B* C*

Kingston KHX96002K2/2G 2048MB(Kit of 2) DS N/A Heat-SinkPackage 5-5-5-15 2.2V •

OCZ OCZ2FX12002GK 2048MB(Kit of 2) DS N/A Heat-SinkPackage 5-5-5-18 2.1 - 2.3 V •

TEAM TXDD1024M1300HC6 2048MB(Kit of 2) DS Heat-Sink Package Heat-SinkPackage 6-6-6-18 2.35V~2.45V •

winchip 64A0TMTHE8G17C 2048MB(Kit of 2) DS N/A Heat-SinkPackage •

DDR2-1066 MHz capability

Vendor Part No. Size

SS/DSChip

Brand

Chip No.

Timing

DIMM

(BIOS)

Voltage

DIMM

Support

A* B* C*

A-Data AD21066E002GU 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.1V • •

Apacer 78.0AGBD.9L5 1024MB SS N/A Heat-Sink Package 5-5-5-15 • • •

Apacer 78.AAGBD.9LZ 2048MB DS N/A Heat-Sink Package 5-5-5-15 •

Corsair CM2X1024-8500C5 1024MB DS Corsair Heat-Sink Package •

Corsair CM2X2048-8500C5D 4096MB(kit of 2) DS N/A Heat-Sink Package 5-5-5-15 • •

Crucial BL12864AA1065.8FE5 1024MB SS N/A Heat-Sink Package • •

Crucial CT25664AA1067.16FE1 2048MB DS Micron 9DJKH D9JKH 7-7-7-13 • •

G.SKILL F2-8500CL5D-2GBPI 2048MB(kit of 2) SS N/A Heat-Sink Package 5-5-5-15 2.1V • •

E4711_M4A785D-M PRO.indb 11 7/6/09 9:09:48 AM

1-12 Chapter 1: Product introduction

Vendor Part No. Size

SS/DSChip

Brand

Chip No.

Timing

DIMM

(BIOS)

Voltage

DIMM

Support

A* B* C*

G.SKILL F2-8500CL5S-1GBPK 1024MB DS N/A Heat-Sink

PackageSN:815130037562

5-5-5-15 • • •

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

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

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

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

GEIL GB22GB8500C5DC 1024MB SS GEIL GL2L128M88BA18BW 5 •

GEIL GB24GB8500C5QC 1024MB SS GEIL GL2L128M88BA25AB 5 • •

GEIL GE22GB1066C5DC 1024MB SS GEIL Heat-Sink Package 5 • • •

GEIL GE24GB1066C5QC 1024MB SS GEIL Heat-Sink Package 5 • •

GEIL GB24GB8500C5DC 2048MB DS GEIL GL2L128M88BA25AB 5 •

GEIL GE24GB1066C5DC 2048MB DS GEIL Heat-Sink Package 5 • •

GEIL GX24GB8500C5UDC 4096MB(kit of 2) DS N/A Heat-Sink Package 5 • •

kingmax KLED48F-B8KU6-NGES 1024MB SS kingmax KKB8FNUXF-DXX-18A 6-6-6-24 1.9V • • •

kingmax KLEE88F-B8KU6-NNAS 2048MB DS kingmax KKB8FNUXF-DXX-18A 6-6-6-24 1.9V • •

Kingston KHX8500D2K2/1GN(EPP) 1024MB(Kit of 2) SS Kingston Heat-Sink Package 5-5-5-18 1.8V • • •

Kingston KHX8500D2/1G 1024MB SS N/A Heat-Sink Package • • •

Kingston KHX8500D2K2/2GN(EPP) 1024MB DS Kingston Heat-Sink Package 5-5-5-18 1.8V • •

Kingston KVR1066D2N7/1G 1024MB DS Elpida E5108AJBG-1J-E 7 1.8V • • •

Kingston KHX8500D2K2/2G 2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.2V • •

Kingston KHX8500D2K2/4G 2048MB DS N/A Heat-Sink Package 5-5-5-15 2.2V • •

Micron CT25664AA1067.16FE1 2048MB DS Micron 9DJKH D9JKH 7-7-7-13 • •

OCZ OCZ2N10662GK(Epp) 2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 21.V • •

OCZ OCZ2N1066SR2DK(Epp) 2048MB(Kit of 2) DS OCZ Heat-Sink Package

004820806001601-2

5-5-5-15 2.1 - 2.3V •

OCZ OCZ2P10664GK(EPP) 4096MB(kit of 2) DS N/A Heat-Sink Package 5-5-5-18 2.2V • •

OCZ OCZ2P10664GK 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-18 2.2V • • •

OCZ OCZ2RPR10664GK 4096MB(kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.2V • •

PSC AL8E8G73F-AE1 2048MB DS PSC A3R1GE3FGF907MAT0F

TAIWAN-G8E

5-5-5-12 • • •

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

Transcend TX1066QLU-4GK 4096MB(kit of 2) DS Transcend Heat-Sink Package 5 • •

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

BUFFALO FSX1066D2C-2G 2048MB DS N/A Heat-Sink Package 5-5-5-15 •

Elixir M2Y1G64TU88D5B-BD 1024MB SS Elixir M2TU1G800E-BD 5 •

Kingtiger KTG2G1066PG2 2048MB DS N/A Heat-Sink Package • •

MUSHKIN 996684 2048MB(Kit of 2) SS N/A Heat-Sink Package 5-5-5-15 2.0 ~ 2.1V • •

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

PATRIOT PDC22G8500ELK 2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-12 2.3V • •

DDR2-1066MHz capability

E4711_M4A785D-M PRO.indb 12 7/6/09 9:09:49 AM

ASUS M4A785D-M PRO 1-13

DDR2-800MHz capability

(continued on the next page)

Vendor Part No. Size

SS/DSChip

Brand

Chip No.

Timing

DIMM

(BIOS)

Voltage

DIMM

Support

A* B* C*

A-Data AD2800E001G0U 2048MB(Kit of 2) SS N/A Heat-Sink Package 4-4-4-12 2.0~2.1V • • •

A-Data M2GVD6G314170Q1E58 1024MB DS VDATA VD29608A8A-25EG80813 • •

A-Data AD2800002GMU 2048MB DS Hynix Heat-Sink Package • • •

A-Data AD2800E002GOU 4096MB(Kit of 2) DS N/A Heat-Sink Package 4-4-4-12 1.9~2.1V • • •

Apacer 78.91G91.9K5 512MB SS Apacer AM4B5708JQJS8E0751C 5 • •

Apacer 78.01GA0.9L5 1024MB SS Apacer AM4B5808FEWS8E0909C 5 • • •

Corsair CM2X1024-6400 1024MB DS Corsair Heat-Sink Package •

Corsair XMS2-6400 1024MB DS Corsair Heat-Sink Package 4 • • •

Corsair XMS2-6400 1024MB DS Corsair Heat-Sink Package 5 • •

Corsair CM2X2048-6400C5DHX 4096MB(Kit of 2) DS N/A Heat-Sink Package 5 • •

Corsair CM2X2048-6400C5 4096MB(Kit of 2) DS N/A Heat-Sink Package 5 • •

Crucial BL12864AL80A.8FE5(EPP) 2048MB(kit of 2) SS N/A Heat-Sink Package 4-4-4-12 • • •

Crucial CT25664AA800.16FG 2048MB DS Micron 8ZG27 D9JWB 6-6-6-12 • • •

Crucial BL25664AL80A.16FE5(EPP) 4096MB(kit of 2) DS N/A Heat-Sink Package 4-4-4-12 • • •

Crucial BL25664AR80A.16FE5(EPP) 4096MB(kit of 2) DS N/A Heat-Sink Package 4-4-4-12 • • •

G.SKILL F2-6400CL5D-1GBNQ 512MB SS G.SKILL Heat-Sink Package

SN:8151030036642

5-5-5-15 • • •

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

G.SKILL F2-6400CL5D-2GBNQ 1024MB DS G.SKILL Heat-Sink Package 5 • • •

G.SKILL F2-6400CL4D-4GBPK 2048MB DS G.SKILL Heat-Sink Package 4 • • •

G.SKILL F2-6400CL5D-4GBPQ 2048MB DS G.SKILL Heat-Sink Package 5 • •

G.SKILL F2-6400CL6Q-16GMQ 4096MB DS N/A Heat-Sink Package 5 • • •

GEIL GB22GB6400C4DC 1024MB DS GEIL GL2L64M088BA30EB 5 • • •

GEIL GB22GB6400C5DC 1024MB DS GEIL GL2L64M088BA30EB 5 • • •

GEIL GB24GB6400C4QC 1024MB DS GEIL GL2L64M088BA30EB 4 • • •

GEIL GB24GB6400C5QC 1024MB DS GEIL GL2L64M088BA30EB 5 • • •

GEIL GE22GB800C4DC 1024MB DS GEIL Heat-Sink Package 4 • • •

GEIL GE22GB800C5DC 1024MB DS GEIL Heat-Sink Package 5 • • •

GEIL GE24GB800C4QC 1024MB DS GEIL Heat-Sink Package 4 • • •

GEIL GE24GB800C5QC 1024MB DS GEIL Heat-Sink Package 5 • • •

GEIL GX22GB6400DC 1024MB DS GEIL Heat-Sink Package 5 1.8V • • •

GEIL GX22GB6400UDC 1024MB DS GEIL Heat-Sink Package 4 • •

GEIL GB24GB6400C5DC 2048MB DS GEIL GL2L128M88BA25AB 5 • •

GEIL GB28GB6400C4QC 2048MB DS GEIL GL2L128M88BA25AB 4 • • •

GEIL GB28GB6400C5QC 2048MB DS GEIL GL2L128M88BA25AB 5 • • •

GEIL GE24GB800C4DC 2048MB DS GEIL Heat-Sink Package 4 • • •

GEIL GE24GB800C5DC 2048MB DS GEIL Heat-Sink Package 5 • • •

GEIL GE28GB800C4QC 2048MB DS GEIL Heat-Sink Package 4 • • •

GEIL GE28GB800C5QC 2048MB DS GEIL Heat-Sink Package 5 • • •

GEIL GX22GB6400C4USC 2048MB DS GEIL Heat-Sink Package 4 • •

GEIL GX22GB6400LX 2048MB DS GEIL Heat-Sink Package 5 • • •

GEIL GX24GB6400DC 2048MB DS GEIL Heat-Sink Package 5 • • •

GEIL GX24GB6400DC 2048MB DS GEIL Heat-Sink Package 5 • • •

Kingmax KLDD48F-B8KU5 NGES 1024MB SS Kingmax KKB8FNUBF-DNX-25A • • •

kingmax KLDE88F-B8KU5 NHES 2048MB DS kingmax KKB8FNUBF-DNX-25A • • •

Kingston KVR800D2N6/ 512 512MB SS Elpida E5108AJBG-8E-E 6 • • •

E4711_M4A785D-M PRO.indb 13 7/6/09 9:09:51 AM

1-14 Chapter 1: Product introduction

DDR2-800 MHz capability

Vendor Part No. Size

SS/DSChip

Brand

Chip No.

Timing

DIMM

(BIOS)

Voltage

DIMM

Support

A* B* C*

Kingston KHX6400D2LLK2/1GN 1024M(Kit of 2) SS Kingston Heat-Sink Package 4-4-4-12 2.0V • • •

Kingston KVR800D2N5/1G(low prole) 1024MB SS Elpida E1108AEBG-8E-F 5 1.8V • • •

Kingston KVR800D2N6/1G(low prole) 1024MB SS Samsung K4T1G084QE 6 1.8V • • •

Kingston KHX6400D2K2/2G 2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 2.0V • • •

Kingston KVR800D2N5/2G(low prole) 2048MB DS Kingston D1288TEFCGL25U 5 1.8V • • •

Kingston KVR800D2N6/2G(low prole) 2048MB DS Samsung K4T1G084QE 6 1.8V • • •

Kingston KVR800D2N6/4G 4096MB DS Elpida E2108ABSE-8G-E 6 1.8V • • •

Micron MT9HTF6472AY-80ED4 512MB SS Micron 6ED22D9GKX(ECC) • • •

Micron MT9HTF12872AY-800E1 1024MB SS Micron D9HNP 7YE22(ECC) • • •

Micron MT18HTF12872AY-80ED4 1024MB DS Micron 6TD22D9GKX(ECC) • • •

Micron MT16HTF25664AY-800G1 2048MB DS Micron 8ZG27 D9JWB 6-6-6-12 • • •

OCZ OCZ2G800R22GK 1024MB DS OCZ Heat-Sink Package 4-5-5-15 2.0V • • •

OCZ OCZ2P800R22GK 1024MB DS OCZ Heat-Sink Package 4-4-4-15 1.9

- 2.1 V

• • •

OCZ OCZ2RPR8002GK 1024MB DS OCZ Heat-Sink Package 4-4-4-15 2.1V • • •

OCZ OCZ2VU8004GK 1024MB DS OCZ Heat-Sink Package 5-6-6-18 1.8V • •

OCZ OCZ2SE8002GK 2048MB(Kit of 2) DS N/A Heat-Sink Package 5-5-5-15 1.8V • • •

OCZ OCZ2F8004GK(EPP) 2048MB DS N/A Heat-Sink Package 5-4-4-18 2.1V • • •

OCZ OCZ2P8004GK 4096MB(Kit of 2) DS N/A Heat-Sink Package 5-4-4-15 2.1v • • •

PSC AL7E8F73C-8E1 1024MB SS PSC A3R1GE3CFF734MAA0E 5 • • •

PSC AL7E8G73F-8E1 1024MB SS PSC P3R1GE3FGF850MAC19 • • •

PSC AL7E8E63H-10E1K 2048MB DS PSC A3R1GE3CFF750RABBP(ECC) • •

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

PSC AL8E8G73F-8E1 2048MB DS PSC P3R1GE3FGF850MAC19 • • •

PSC PL8E8F73C-8E1 2048MB DS PSC SHG772-AA3G 5 • • •

PSC PL8E8G73E-8E1 2048MB DS PSC XCP271A3G-A 5 • • •

Qimonda HYS64T256020EU-2.5-C2 2048MB DS Qimonda HY818T1G800C2F-2.5 5 • •

Samsung M378T6553GZS-CF7 512MB SS Qimonda K4T51083QG-HCF7 6 • • •

Samsung M378T2863EHS-CF7 1024MB SS Samsung K4T1G084QE • • •

Samsung M378T2863QZS-CF7 1024MB SS Qimonda K4T1G084QQ-HCF7 6 • • •

Samsung M391T2863QZ3-CF7 1024MB SS Samsung K4T1G084QQ-HCF7(ECC) • • •

Samsung M378T2953GZ3-CF7 1024MB DS Samsung K4T51083QG • • •

Samsung M378T2953GZ3-CF7 1024MB DS Samsung K4T51083QG-HCF7 6 • •

Samsung M37875663QZ3-CF7 2048MB DS Samsung K4T1G084QQ-HCF7 6 • •

Samsung M391T5663QZ3-CF7 2048MB DS Samsung K4T1G084QQ-HCF7(ECC) • • •

Samsung M378T5263AZ3-CF7 4096MB DS Samsung K4T2G084QA-HCF7 • • •

Super
Talent

T800UB1GC4 1024MB DS Super

Talent

Heat-Sink Package 4 1.8V • •

Transcend TS64MLQ64V8J 512MB SS Micron 7HD22 D9GMH 5 • • •

Transcend JM800QLU-1G 1024MB SS Transced TQ1243PCF8 5 • •

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

Transcend JM800QLJ-1G 1024MB DS Transced TQ123PJF8F0801 5 • •

Transcend JM800QLJ-1G 1024MB DS Transcend TQ123YBF8 T0747 5 • • •

Transcend TS128MLQ64V8J 1024MB DS Mircon 7HD22D9GMH 5 • •

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

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

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

AENEON AET760UD00-25DC08X 1024MB SS AENEON AET03R250C 0732 5 • • •

(continued on the next page)

E4711_M4A785D-M PRO.indb 14 7/6/09 9:09:53 AM

ASUS M4A785D-M PRO 1-15

Vendor Part No. Size

SS/DSChip

Brand

Chip No.

Timing

DIMM

(BIOS)

Voltage

DIMM

Support

A* B* C*

AENEON AET860UD00-25DC08X 2048MB DS AENEON AET03R25DC 0732 5 • • •

ASINT SLY2128M8-JGE 1024MB SS ASINT DDRII1208-GE 8115 • • •

ASINT SLZ2128M8-JGE 2048MB DS ASINT DDRII1208-GE 8115 • • •

Century 28V0H8 1024MB DS Hynix HY5PS12821CFP-S5 5 • • •

Elixir M2Y1G64TU88D5B-AC

0828.GS

1024MB SS Elixir N2TU16800E-AC • • •

ELIXIR M2Y1G64TU8HB0B-25C 1024MB DS ELIXIR N2TU 51280BE-

25C802006Z1DV

5 • • •

Elixir M2Y2G64TU8HD5B-AC

0826.SG

2048MB DS Elixir N2TUG80DE-AC •

Kingtiger 1GB DIMM PC2-6400 1024MB DS Hynix HY5PS12821C FP-S5 • • •

Kingtiger 2GB DIMM PC2-6400 2048MB DS Hynix HY5PS1G831C FP-S6 • •

Kingtiger KTG2G800PG2 2048MB DS N/A Heat-Sink Package • •

Kingtiger KTG2RX16P ST-01 4096MB(Kit of 2 ) DS N/A Heat-Sink Package 5-5-5-15 1.9V • • •

MDT MDT 512MB 512MB SS MDT 18D 51280D-2.50726F 5 •

MDT MDT 1024MB 1024MB DS MDT 18D 51280D-2.50726E 5 • •

PATRIOT PDC24G6400ELK 4096MB(Kit of 2 ) DS N/A Heat-Sink Package 5-5-5-12 2.0V • •

TAKEMS TMS51B264C081-805EP 512MB SS takeMS MS18T 51280-2.5P0710 5 • • •

TAKEMS TMS1GB264D082-805EE 1024MB SS TAKEMS WS18T1G80-205 E0905 5 • • •

TAKEMS TMS1GB264C081-804EE 1024MB DS TAKEMS Heat-Sink Package 4-4-4-12 • • •

TAKEMS TMS1GB264C081-805EP 1024MB DS takeMS MS18T 51280-2.5P0716 5 • •

TAKEMS TMS2GB264D081-805KE 2048MB DS TAKEMS MS18T1G80-205 E0907 5 • • •

UMAX D48001GP3-63BJU 1024MB DS UMAX U2S12D30TP-8E • • •

UMAX D48002GP0-73BCU 2048MB DS UMAX U2S24D30TP-8E 5 •

VDATA M2XSSKG3147C1L1C5Z 1024MB DS Samsung K4T51083QE • • •

VDATA M2XHYKH3J47CC01E5Z 2048MB DS Hynix H5PS1G83EFRS6C 852AK • • •

V-Data M2GVD6G3H3160Q1E52 512MB SS VDATA VD29608A8A-25EG20813 • • •

DDR2-800 MHz capability

(continued on the next page)

DDR2-667MHz capability

Vendor Part No. Size

SS/DSChip

Brand

Chip No.

Timing

DIMM

(BIOS)

Voltage

DIMM Support

A* B* C*

A-Data M2OAD5H3J4170I1C53 2048MB DS ADATA AD20908A8A-3EG 30724 • • •

Apacer 78.91G92.9K5 512MB SS Apacer AM4B5708JQJS7E0751C 5 • • •

Apacer AU 512E667C5KBGC 512MB SS Apacer AM4B5708MIJS7E0627B 5 •

Apacer 78.01G9O.9K5 1024MB SS Apacer AM4B5808CQJS7E0751C 5 • • •

Apacer AU01GE667C5KBGC 1024MB DS Apacer AM4B5708GQJS7E0636B • • •

Apacer AU01GE667C5KBGC 1024MB DS Apacer AM4B5708MIJS7E0627B 5 • •

Apacer 78.A1G9O.9K4 2048MB DS Apacer AM4B5808CQJS7E0749B 5 • • •

Corsair VS 512MB667D2 512MB DS Corsair MIII0052532M8CEC •

Corsair VS1GB667D2 1024MB DS Corsair MID095D62864M8CEC • •

Corsair XMS2-5400 1024MB DS Corsair Heat-Sink Package 4 • • •

G.SKILL F2-5400PHU2-2GBNT 2048MB(Kit of 2) DS G.SKILL D2 64M8CCF 0815 C7173S 5-5-5-15 • • •

G.SKILL F2-5300CL5D-4GBMQ 4096MB(Kit of 2) DS G.SKILL Heat-Sink Package

SN:8151030036559

5-5-5-15 • • •

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1-16 Chapter 1: Product introduction

DDR2-667MHz capability

Vendor Part No. Size

SS/DSChip

Brand

Chip No.

Timing

DIMM

(BIOS)

Voltage

DIMM Support

A* B* C*

GEIL GX21GB5300SX 1024MB DS GEIL Heat-Sink Package 3 • •

GEIL GX22GB5300LX 2048MB DS GEIL Heat-Sink Package 5 • •

GEIL GX24GB5300LDC 2048MB DS GEIL Heat-Sink Package 5 • • •

Kingmax KLCC28F-A8KB5 512MB SS Kingmax KKEA88B4LAUG-29DX • • •

Kingmax KLCD48F-A8KB5 1024MB DS Kingmax KKEA88B4LAUG-29DX • • •

Kingston KVR667D2N5/ 512(low prole) 512MB SS Elpida E5108AJBG-6E-E 5 1.8V • • •

Kingston KVR667D2E5/1G 1024MB SS Elpida E1108ACBG-8E-E(ECC) 5 1.8V • • •

Kingston KVR667D2N5/1G(low prole) 1024MB DS Elpida E5108AJBG-8E-E 5 1.8V • • •

Kingston KVR667D2E5/2G 2048MB DS Nanya NT5TU128M8DE-3C(ECC) 5 1.8V • • •

Kingston KVR667D2N5/2G(low prole) 2048MB DS Elpida E1108ACBG-8E-E 5 1.8V • •

Micron MT8HTF12864AY-667E1 1024MB SS Micron D9HNL 7ZE17 5 • •

PSC AL6E8E63J-6E1 512MB SS PSC A3R12E3JFF717B9A00 5 • • •

PSC AL7E8F73C-6E1 1024MB SS PSC A3R1GE3CFF734MAA0J 5 • • •

PSC AL6E8E63J-6E1 1024MB DS PSC A3R12E3JFF717B9A01 5 • • •

PSC AL8E8F73C-6E1 2048MB DS PSC A3R1GE3CFF733MAA00 5 • • •

Samsung M378T5263AZ3-CE6 4096MB DS Samsung K4T2G084QA-HCE6 • • •

Super
Talent

T667UB1GV 1024MB DS Super

Talent

PG 64M8-800 0750 5 1.8V • • •

Transcend JM667QLU-1G 1024MB SS Transced TQ243PCF8T0838 5 • •

Transcend JM667QLJ-1G 1024MB DS Elpida E5108AJBG-6E-E 5 • • •

Transcend JM667QLU-2G 2048MB DS Transced TQ243PCF8T0834 5 • • •

Twinmos 8D-A3JK5MPETP 512MB SS PSC A3R12E3GEF633ACAOY 5 • • •

AENEON AET860UD00-30DB08X 2048MB DS AENEON AET03F30DB 0730 5 • • •

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

ASINT SLY2128M8-J6E 1024MB SS ASINT DDRII1208-6E 8115 • • •

Century CENTURY 512MB 512MB SS Hynix HY5PS12821AFP-Y5 •

Century CENTURY 512MB 512MB SS Nanya NT5TU64M8AE-3C • • •

Century CENTURY 1G 1024MB DS Hynix HY5PS12821AFP-Y5 •

Century CENTURY 1G 1024MB DS Nanya NT5TU64M8AE-3C • •

ELIXIR M2Y1G64TU8HA2B-3C 1024MB DS elixir M2TU 51280AE-

3C717095R28F

5 1.7-

1.9v

• • •

Elixir M2Y1G64TU8HBOB-3C 1024MB DS Elixir N2TU 51280BE-

3C639009W1CF

5 • • •

KINGBOX 512MB 667MHz 512MB SS KINGBOX EPD264082200-4 • • •

KINGBOX DDRII 1G 667MHz 1024MB DS KINGBOX EPD264082200-4 • •

Leadmax LRMP 512U64A8-Y5 1024MB DS Hynix HY5PS12821CFP-Y5 C

702AA

5 • • •

MDT DDRII 512 PC667 512MB DS MDT 18D 51201D-30726E 4 •

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

TAKEMS TMS51B264C081-665AP 512MB SS takeMS MS18T 51280-3S0627D 5 • •

TAKEMS TMS51B264C081-665QI 512MB SS takeMS MS18T 51280-3 5 • • •

TAKEMS TMS1GB264C081-665AE 1024MB DS takeMS MS18T 51280-3SEA07100 5 •

TAKEMS TMS1GB264C081-665AP 1024MB DS takeMS MS18T 51280-3SP0717A 5 • •

TAKEMS TMS1GB264C081-665QI 1024MB DS takeMS MS18T 51280-3 5 • •

TEAM TVDD1.02M667C4 1024MB DS TEAM T2D648PT-6 •

UMAX D46701GP3-63BJU 1024MB DS UMAX U2S12D30YP-6E • • •

UMAX D46702GP0-73BCU 2048MB DS UMAX U2S24D30TP-6E 5 • •

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ASUS M4A785D-M PRO 1-17

SS - Single-sided / DS - Double - sided
DIMM support:

• A*: Supports one module inserted into any slot as Single-channel memory conguration.

• B*: Supports one pair of modules inserted into either the blue or black slots as one

pair of Dual-channel memory conguration.

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

Dual-channel memory conguration.

Visit the ASUS website www.asus.com for the latest QVL.

• The default DIMM frequency depends on its Serial Presence Detect (SPD), which is the
standard way of accessing information from a memory module. Under the default state,
some memory modules for overclocking may operate at a lower frequency than the
vendor-marked value.

• The memory modules may require a better cooling system to work stably under full
loading (4 DIMMs) or overclocking setting.

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1-18 Chapter 1: Product introduction

DDR2 DIMM notch

1

1

2

Unlocked retaining clip

1

DDR2 DIMM notch

2

1

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.

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.

1.7.4 Removing a DIMM

To remove a DIMM:

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

2. Remove the DIMM from the socket.

Support the DIMM lightly with

your ngers when pressing the

retaining clips. The DIMM might

get damaged when it ips out with

extra force.

Locked Retaining Clip

3

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ASUS M4A785D-M PRO 1-19

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.

1.8.3 PCI slots

The PCI slots support 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 slot

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 x16 slot

This motherboard supports a PCI Express x16 graphics card that complies with the PCI

Express specications.

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1-20 Chapter 1: Product introduction

1.9 Jumpers

1. 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.

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

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
reenter data.

• If the steps above do not help, remove the onboard battery and move the jumper again
to clear the CMOS RTC RAM data. After clearing the CMOS, 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 CPU Parameter Recall (C.P.R)
feature. Shut down and reboot the system so the BIOS can automatically reset
parameter settings to default values.

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ASUS M4A785D-M PRO 1-21

1.10 Connectors

1.10.1 Rear panel connectors

1. PS/2 keyboard/mouse combo port (purple). This port is for a PS/2 keyboard/mouse.

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

optical S/PDIF cable.

3. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other

VGA-compatible devices.

4. USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus (USB) ports are

available for connecting USB 2.0 devices.

5. LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN)

through a network hub.

6. Center/Subwoofer port (orange). This port connects the center/subwoofer speakers.

7. Rear Speaker Out port (black). 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). This port connects a microphone.

11. Side Speaker Out port (gray). This port connects the side speakers in an 8-channel

audio conguration.

LAN port LED indications

Activity/Link LED Speed LED

Status Description Status Description

OFF No link OFF 10 Mbps connection

ORANGE Linked ORANGE 100 Mbps connection

BLINKING Data activity GREEN 1 Gbps connection

LAN port

SPEED

LED

ACT/LINK

LED

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1-22 Chapter 1: Product introduction

12. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are

available for connecting USB 2.0 devices.

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

14. DVI-D port. This port is for any DVI-D compatible device. DVI-D can’t be converted to

output RGB Signal to CRT and isn’t compatible with DVI-I.

15. HDMI port. This port is for a High-Denition Multimedia Interface (HDMI) connector,

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

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

Port Headset

2-channel

4-channel 6-channel 8-channel

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 Out Rear Speaker Out

Gray – – – Side Speaker Out

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

Dual display output support

• This table indicates that whether the following dual display outputs are

supported for your motherboard:

Dual display outputs Supported Not supported

DVI + D-Sub •

DVI + HDMI •

HDMI + D-Sub •

• During POST, only the monitor connected to the D-Sub port has display.

The dual display function works only under Windows.

E4711_M4A785D-M PRO.indb 22 7/6/09 9:10:06 AM

ASUS M4A785D-M PRO 1-23

Playback of HD DVD and Blu-Ray Discs

• For better playback quality, we recommend that you follow the system
requirements listed below.

Suggested list
CPU AMD® Athlon 4400+
DIMM DDR2 800 (1GB or higher)
BIOS setup Frame Buffer Size--256MB or higher

File format

Best resolution

Windows XP Windows Vista

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

• Supported DVD formats: VC-1, H.264, and MPEG-2.

• To play HD DVD or Blu-Ray Disc, ensure to use HDCP compliant devices
and software.

16. USB 2.0 ports 5 and 6. These two 4-pin Universal Serial Bus (USB) ports are

available for connecting USB 2.0 devices.

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1-24 Chapter 1: Product introduction

1.10.2 Internal connectors

1. 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.

E4711_M4A785D-M PRO.indb 24 7/6/09 9:10:08 AM

ASUS M4A785D-M PRO 1-25

2. 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

Two devices

Cable-Select

Master Black

Slave Gray

Master Master

Black or gray

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.

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

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

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

The S/PDIF module is purchased separately.

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1-26 Chapter 1: Product introduction

• The motherboard does not provides a oppy disk drive connector. You could use a USB
oppy disk drive when installing Windows® XP operating system on a hard disk drive

that includes a RAID/AHCI set.

• Due to Windows® XP limitation, Windows® XP may not recognize the USB oppy disk
drive.

• For more details on RAID/AHCI, refer to the RAID/AHCI Supplementary Guide included
in the folder named Manual in the support DVD.

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

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

4. Serial ATA connectors (7-pin SATA1, SATA2, SATA3, SATA5, SATA6)

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, RAID 0+1, and JBOD congurations through

the onboard chipset.

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

5. LPT connector (26-1 pin LPT)

The LPT (Line Printing Terminal) connector supports devices such as a printer. LPT

standardizes as IEEE 1284, which is the parallel port interface on IBM PC-compatible

computers.

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ASUS M4A785D-M PRO 1-27

6. System panel connector (20-8 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 PWRSW)

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.

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1-28 Chapter 1: Product introduction

7. USB connectors (10-1 pin USB78, USB910, USB1112)

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.

• 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.

• By default, this connector is set to [HD Audio]. If you want to connect a High Denition
front panel audio module to this connector, set the Front Panel Select item in the BIOS
to [HD Audio]. See section “2.4.4 Onboard Devices Conguration” for details.

8. 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.

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ASUS M4A785D-M PRO 1-29

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 4-pin CPU fan connector supports the ASUS Q-FAN feature.

9. CPU, chassis, and power fan connectors
(4-pin CPU_FAN, 3-pin CHA_FAN, 3-pin PWR_FAN)

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

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

10. Serial port connectors (10-1 pin COM1)

The connector is for a serial (COM) port. Connect the serial port module cable to the

connector, then install the module to a slot opening at the back of the system chassis.

The serial port bracket (COM1) is purchased separately.

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1-30 Chapter 1: Product introduction

Click an item to install

Click an icon to
display Support DVD/
motherboard information

To run the Support DVD

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

If Autorun is NOT enabled on 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.

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. Refer to your OS documentation for
detailed information.

• Ensure that you install Windows® XP Service Pack 3 or later versions/ Windows® Vista
Service Pack 1 or later versions before installing 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.

E4711_M4A785D-M PRO.indb 30 7/6/09 9:10:17 AM

ASUS M4A785D-M PRO 2-1

Chapter 2

BIOS information

2.1 Managing and updating your BIOS

• 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.

Updating the BIOS

To update the BIOS:

1. From the Windows® desktop, click Start > Programs > ASUS > ASUSUpdate >

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, then click Next.

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

Select then click Next.

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

Next.

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

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.

Installing ASUS Update

To install ASUS Update:

1. Place the support DVD in the optical drive. The Drivers menu appears.

2. Click the Utilities tab, then click Install ASUS Update.

3. Follow the onscreen instructions to complete the installation.

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

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.

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2-2 Chapter 2: BIOS information

2.1.2 ASUS EZ Flash 2 utility

The ASUS EZ Flash 2 feature allows you to update the BIOS without having to use an

OS-based utility.

Before using this utility, download the latest BIOS le 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, then launch
EZ Flash 2. You can launch EZ Flash 2 in two ways.

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

• Enter the BIOS setup program. Go to the Tools menu to select EZ Flash 2 and

press <Enter> to enable it.
Press <Tab> to switch between drives until the correct BIOS le is found.

2. 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!

ASUSTek EZ Flash 2 BIOS ROM Utility V3.36

Current ROM

Update ROM

A:

Note

FLASH TYPE: MXIC 25L8005

PATH: A:\

BOARD: M4A785D-M PRO
VER: 0302 (H:01 B:02)
DATE: 06/20/2009

BOARD: Unknown
VER: Unknown
DATE: Unknown

[Enter] Select or Load [Ta b] Switch [V] Drive Info

[Up/Down/Home/End] Move [B] Backup [ESC] Exit

Updating from a BIOS file

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

b. Locate the BIOS le from the Open window, then click Open.

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

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ASUS M4A785D-M PRO 2-3

• Only the USB ash disk with FAT 32/16 format and single partition can support ASUS
CrashFree BIOS 3. The device size should be smaller than 8GB.

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

2.1.3 ASUS CrashFree BIOS 3 utility

The ASUS CrashFree BIOS 3 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 update a corrupted BIOS

le using the motherboard support DVD or a USB ash disk that contains the updated BIOS
le.

• Prepare the motherboard support DVD, or the USB ash disk containing the updated

motherboard BIOS before using this utility.

• Updating from a SATA optical drive is not supported when both an IDE optical drive and
a SATA optical drive are installed in this motherboard.

Bad BIOS checksum. Starting BIOS recovery...
Checking for CD-ROM...

When found, the utility reads the BIOS le and starts erasing the corrupted BIOS le.

Bad BIOS checksum. Starting BIOS recovery...
Checking for CD-ROM
CD-ROM found!

Reading le “M4A785MP.ROM”. Completed.

Start erasing...

Recovering the BIOS

To recover the BIOS:

1. Turn on the system.

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

3. The utility displays the following message and automatically checks the support DVD,

or USB ash disk for the BIOS le.

4. Restart the system after the utility completes the updating process.

• The utility automatically checks the optical drive rst. If no optical drive is found, the
utility then checks the USB ash disk.

• The recovered BIOS may not be the latest BIOS version for this motherboard. Download

the latest BIOS le from the ASUS website at www.asus.com.

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2-4 Chapter 2: BIOS information

• 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 Setup Defaults item under the Exit menu. See section “2.8 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 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 <Ctrl>+<Alt>+<Del> simultaneously.

• Press the reset button on the system chassis.

• 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 sub-menus and make your selections from the
available options using the navigation keys.

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ASUS M4A785D-M PRO 2-5

2.2.1 BIOS menu screen

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

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.

Select Screen

Select Item

+-

Change Field

Tab Select Field
F1 General Help
F10 Save and Exit
ESC Exit

v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.

BIOS SETUP UTILITY

Main Advanced Power Boot Tools Exit

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

select a eld.

Use [+] or [-] to

congure system Time.

System Time [19:34:30]

System Date [Tue 06/23/2009]

Primary IDE Master :[Not Detected]
Primary IDE Slave :[Not Detected]
SATA1 :[Not Detected]
SATA2 :[Not Detected]
SATA3 :[Not Detected]
SATA5 :[Not Detected]
SATA6 :[Not Detected]
E-SATA :[Not Detected]

SATA Conguration

System Information

Menu items

Menu bar

Conguration elds

General help

Sub-menu items

Navigation keys

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2-6 Chapter 2: BIOS information

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 Sub-menu items

A solid triangle before each item on any menu screen means that the iteam has a sub-menu.
To display the sub-menu, 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.”

2.2.3 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.

2.2.7 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 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

Select Screen

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

v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.

BIOS SETUP UTILITY

Main Advanced Power Boot Tools Exit

Suspend Mode [Auto]

ACPI 2.0 Support [Disabled]

ACPI APIC support [Enabled]

APM Conguration

Hardware Monitor

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

a eld.

Use [+] or [-] to

congure system

Time.

Pop-up window

Scroll bar

Options

Disabled

Enabled

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ASUS M4A785D-M PRO 2-7

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.

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.

Refer to section “2.2.1 BIOS menu screen” for information on the menu screen items and

how to navigate through them.

v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.

Select Screen

Select Item

+-

Change Field

Tab Select Field
F1 General Help
F10 Save and Exit
ESC Exit

v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.

BIOS SETUP UTILITY

Main Advanced Power Boot Tools Exit

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

select a eld.

Use [+] or [-] to

congure system Time.

Main Settings

System Time [19:34:30]

System Date [Tue 06/23/2009]

Primary IDE Master :[Not Detected]
Primary IDE Slave :[Not Detected]
SATA1 :[Not Detected]
SATA2 :[Not Detected]
SATA3 :[Not Detected]
SATA5 :[Not Detected]
SATA6 :[Not Detected]
E-SATA :[Not Detected]

SATA Conguration

System Information

2.3.3 Primary IDE Master/Slave, SATA 1-3, 5-6, and E-SATA

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

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

LBA Mode, Block Mode, PIO Mode, DMA Mode, and SMART monitoring). These values are
not user-congurable. These items show Not Detected if no IDE/SATA 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]

This item appears only when you select the Primary IDE Master/Slave device.

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2-8 Chapter 2: BIOS information

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]

2.3.4 SATA Conguration

The SATA Conguration menu allows you to congure your SATA device(s). Select an item
then press <Enter> to display the sub-menu.

OnChip S-ATA Channel [Enabled]

Allows you to disable or enable the OnChip S-ATA devices.

Conguration options: [Enabled] [Disabled]

The following item appears only when the OnChip S-ATA Channel item is set to
[Enabled].

OnChip SATA Type [SATA]

Allows you to select the SATA Mode. Conguration options: [SATA] [RAID] [AHCI]

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ASUS M4A785D-M PRO 2-9

2.3.5 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

2.4 Advanced menu

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

Take caution when changing the settings of the Advanced menu items. Incorrect eld

values can cause the system to malfunction.

v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.

BIOS SETUP UTILITY

Main Advanced Power Boot Tools Exit

JumperFree Conguration

CPU Conguration

Chipset

Onboard Devices Conguration

PCIPnP

USB Conguration

Select Screen

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

Adjust System

Frequency/Voltage

etc.

2.4.1 JumperFree Conguration

CPU Overclocking [Auto]

Allows selection of CPU overclocking options to achieve desired CPU internal frequency.
Select either one of the preset overclocking.

• Manual - Allows you to individually set overclocking parameters.

• Auto - Loads the optimal settings for the system.

• Overclock Prole - Loads overclocking proles with optimal parameters for stability when
overclocking.

• Test mode - Loads the test mode.

E4711_M4A785D-M PRO.indb 9 7/6/09 9:10:27 AM

2-10 Chapter 2: BIOS information

CPU Ratio and Voltage:

Processor Frequency Multiplier [Auto]

Allows you to set the processor frequency multiplier. Conguration options: [Auto] [x8.0
1600MHz] [x8.5 1700MHz] [x9.0 1800MHz] [x9.5 1900MHz] [x10.0 2000MHz] [x10.5
2100MHz] [x11.0 2200 MHz] [x11.5 2300 MHz] [x12.0 2400MHz] [x12.5 2500 MHz] [x13.0
2600MHz] [x13.5 2700MHz] [x14.0 2800MHz] [x14.5 2900MHz] [x15.0 3000MHz]

CPU Over Voltage [Auto]

Allows you to set the processor over voltage or set it to [Auto] for safe mode.
Press <+>/<-> keys to adjust the value.

VDDNB Over Voltage [Auto]

Allows you to set the NorthBridge over voltage or set it to [Auto] for safe mode.
Press <+>/<-> keys to adjust the value.

The following item appears only when the CPU Overclocking item is set to [Manual].

CPU /HT Reference Clock (MHz) [200]

Allows you to set the CPU frequency. The valid value is from 200 MHz to 550 MHz.

Press +/- to adjust the value

The following item appears only when the CPU Overclocking item is set to [Overclock
Prole].

Overclok Options [Auto]

Allows you to set the overclock options.

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

PCIE Overclocking [Auto]

Allows you to select the PCIE Overclocking. Conguration options: [Auto] [Manual]

The following item appears only when the PCIE Overclocking item is set to [Manual].

PCIE Clock [100]

Allows you to set the PCIE frequency. The valid value is between 100 and 150.

GPU OverClocking [Auto]

Allows you to select the GPU Overclocking. Conguration options: [Auto] [Manual]

The following item appears only when the GPU Overclocking item is set to [Manual].

GPU Engine Clock [500]

Allows you to set the GPU frequency. The valid value is between 150 and 1000.

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ASUS M4A785D-M PRO 2-11

Hyper Transport Conguration

HT Link Frequency [Auto]

Allows you to set the HyperTransport link frequency. Conguration options: [Auto] [200 MHz]
[400 MHz] [600 MHz] [800 MHz] [1 GMHz] [1.2 GMHz] [1.4 GMHz] [1.6 GMHz] [1.8 GMHz]
[2.0 GMHz] [2.1 GMHz] [2.4 GMHz] [2.6 GMHz]

HT Link Width [Auto]

Allows you to set the HyperTransport link width. Conguration options: [Auto] [8 But] [16 Bit]

HT Over Voltage

Allows you to set the HyperTransport over voltage or set it to [Auto] for safe mode. Press
<+>/<-> to adjust the value. The value ranges from 1.25000V to 1.38500V.

Memory Timming and Voltage

Memory Clock Mode [Auto]

Allows you to set the memory clock mode. Conguration options: [Auto] [Manual]

The following item appears only when the Memory Clock Mode item is set to [Manual].

Memclock Value [200 MHz]

Allows you to set the memory clock value.

Conguration options: [200 MHz] [266 MHz] [333 MHz] [400 MHz] [533 MHz]

DRAM Timing Mode [Auto]

Allows you to set the DRAM timing mode. Conguration options: [Auto] [DCT 0] [DCT-1]
[Both]

The following sub-items appear only when you set the DRAM Timing Mode item to [Both],
[DCT 0], or [DCT 1].

TCL [Auto]

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

TRCD [Auto]

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

tRTP [Auto]

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

TRAS [Auto]

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

TRC [Auto]

Conguration options: [Auto] [11 CLK] [12 CLK] [13 CLK] ~ [23 CLK] [24 CLK] [25 CLK]

tWR [Auto]

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

TRRD [Auto]

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

tWTR [Auto]

Conguration options: [Auto] [1 CLK] [2 CLK] [3 CLK][Auto] [1 CLK] [2 CLK] [3 CLK]

E4711_M4A785D-M PRO.indb 11 7/6/09 9:10:29 AM

2-12 Chapter 2: BIOS information

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 [Disabled]

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

Conguration options: [Disabled] [Enabled]

Cool ‘n’ Quiet [Enabled]

Allows you to enable or disable the Cool ‘n’ Quiet feature.
Conguration options: [Disabled] [Enabled]

CPU Prefetching [Enabled]

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

C1E Conguration [Disabled]

Allows you to enable or disable C1E conguration. Conguration options: [Disabled]
[Enabled]

Advanced Clock Calibration [Disabled]

Allows you to enable or disable the Advanced Clock Calibration function. Conguration
options: [Disabled] [Auto] [All Cores] [Per Core]

Memory OverVoltage [Auto]

Allows you to set the memory over voltage. The value ranges from 1.5000V to 2.4450V with a

0.0150V interval. Press +/- to adjust the value.

Chipset Over Voltage [Auto]

Allows you to manually set the chipset voltage or set it to [Auto] for safe mode. Press +/- to

adjust the value.

tRFC0, 1, 2, and 3 [Auto]

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

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ASUS M4A785D-M PRO 2-13

2.4.3 Chipset

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

NorthBridge Conguration

Memory Conguration

Bank Interleaving [Auto]

Allows you to enable the bank memory interleaving.

Conguration options: [Disabled] [Auto]

Channel Interleaving [Disabled]

Allows you to enable the channel memory interleaving.

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

MemClk Tristate C3/ATLVID [Disabled]

Enables or disables the MemClk Tristate C3/ALTVID.

Conguration options: [Disabled] [Enabled]

Memory Hole Remapping [Enabled]

Enables or disables the memory remapping around memory hole. Conguration
options: [Disabled] [Enabled]

DCT Unganged Mode [Auto]

Allows you to enable or disable Unganed mode.

Conguration options: [Auto] [Always]

Power Down Enable [Enabled]

Enables or disables the DDR power down mode.

Conguration options: [Disabled] [Enabled]

ECC Conguration

ECC Mode [Disabled]

Enables or disables the DRAM ECC that allows the hardware to report and correct

memory errors automatically. Conguration options: [Disabled] [Basic] [Good] [Super]
[Max] [User]

Alternate VID [Auto]

Allows you to set the alternate VID in low power states.

Conguration options: [1.150 V] to [0.800 V] with an increment of 0.025V

Internal Graphics

Primary Video Controller [GFX0-GPP-IGFX-PCI]

Display Device Priority, from high to low. Conguration options: [GFX0-GPP-IGFX-PCI] [GPP­GFX0-IGFX-PCI] [PCI-GFX0-GPP-IGFX] [IGFX-GFX0-GPP-PCI]

UMAFrame Buffer Size [Auto]

Allows you to select the UMA Frame Buffer size. Conguration options: [Auto] [32MB]
[64MB] [128MB] [256MB] [512MB]

Surround View [Disabled]

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] [Enabled]

Frame Buffer Location [Above 4G]

Conguration options: [Below 4G] [Above 4G]

E4711_M4A785D-M PRO.indb 13 7/6/09 9:10:29 AM

2-14 Chapter 2: BIOS information

AMD 785 HDMI Audio [Enabled]

Allows you to enable or disable the AMD 785 HDMI Audio.

Conguration options: [Disabled] [Enabled]

2.4.4 Onboard Devices Conguration

Serial Port1 Address [3F8/IRQ4]

Allows you to select the Serial Port1 base address.

Conguration options: [Disabled] [3F8/IRQ4][2F8/IRQ3] [3E8/IRQ4] [2E8/IRQ3]

Parallel Port Address [378]

Allows you to select the Parallel Port base addresses. Conguration options: [Disabled] [378]
[278] [3BC]

Parallel Port Mode [Normal]

Allows you to select the Parallel Port mode.

Conguration options: [Normal] [EPP] [ECP] [EPP+ECP]

EPP Mode DMA Channel [1.9]

Appears only when the Parallel Port Mode is set to [EPP]. This item allows you to
select the Parallel Port EPP version. Conguration options: [1.9] [1.7]

ECP Mode DMA Channel [DMA3]

Appears only when the Parallel Port Mode is set to [ECP]. This item allows you to set
the Parallel Port ECP DMA. Conguration options: [DMA0] [DMA1] [DMA3]

Parallel Port IRQ [IRQ7]

Allows you to select parallel port IRQ. Conguration options: [IRQ5] [IRQ7]

HDAudio Controller [Enabled]

Allows you to enable or disable the High Denition audio controller. Conguration options:
[Disabled] [Enabled]

Front Panel Select [HD Audio]

Allows you to set HD Audio mode. Conguration options: [AC97] [HD Audio]

OnBoard LAN Controller [Enabled]

Allows you to set 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: [Enabled] [Disabled]

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ASUS M4A785D-M PRO 2-15

USB Functions [Enabled]

Enables or disables the USB functions. Conguration options: [Enabled] [Disabled]

USB 2.0 Controller [Enabled]

Enables or disables the USB 2.0 Controller. Conguration options: [Enabled] [Disabled]

Legacy USB Support [Auto]

Allows you to enable or disable support for Legacy USB storage devices, including USB ash

drives and USB hard drives. 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]

The following items may only appear when a USB storage device is plugged.

USB Mass Storage Device Conguration

USB Mass Storage Reset Delay [20 Sec]

Allows you to set the maximum time that the BIOS waits for the USB storage device to

initialize. Conguration options: [10 Sec] [20 Sec] [30 Sec] [40 Sec]

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

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.

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]

2.4.5 PCI PnP

The PCI PnP menu items allow you to change the advanced settings for PCI/PnP devices.
The menu includes setting IRQ and DMA channel resources for either PCI/PnP or legacy ISA

devices, and setting the memory size block for legacy ISA devices.

Take caution when changing the settings of the PCI PnP menu items. Incorrect eld values

can cause the system to malfunction.

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2-16 Chapter 2: BIOS information

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. Conguration options: [S1 (POS) Only] [S3 Only] [Auto]

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

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

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

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.

[Auto] - Detected by OS.

2.5.2 ACPI 2.0 Support [Enabled]

Allows you to add additional tables as per 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]

Emulation Type [Auto]

Allows you to set the emulation type. Conguration options: [Auto] [Floppy] [Forced FDD]
[Hard Disk] [CDROM]

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.

BIOS SETUP UTILITY

Main Advanced Power Boot Tools Exit

Suspend Mode [Auto]

ACPI 2.0 Support [Disabled]
ACPI APIC Support [Enabled]

APM Conguration

Hardware Monitor

Select the ACPI state
used for System
Suspend.

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ASUS M4A785D-M PRO 2-17

2.5.5 HW Monitor Conguration

CPU Temperature [xxxºC/xxxºF]
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/Power/Chassis Fan Speed [xxxxRPM] or [Ignored]

The onboard hardware monitor automatically detects and displays the fans speed in rotations
per minute (RPM). If the fans are not connected to the motherboard, the elds show N/A.
Select Ignored if you do not wish to display the detected speed.

VCORE Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage

The onboard hardware monitor automatically detects the voltage output through the onboard
voltage regulators.

Smart Q-Fan Function [Disabled]

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

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

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 sub-menu.

Boot Settings Conguration

Security

Species the Boot

Device Priority
sequence.

BIOS SETUP UTILITY

Main Advanced Power Boot Tools Exit

Boot Device Priority

Boot Settings

Power On From S5 By PME# [Disabled]

When set to [Enabled], this parameter allows you to turn on the system through a PCI/PCIE
card. This feature requires an ATX power supply that provides at least 1A on the +5VSB lead.

Conguration options: [Disabled] [Enabled]

Power On From S5 By Ring [Disabled]

Enable or disable RI to generate a wake event. Conguration options: [Disabled] [Enabled]

Power On From S5 By PS/2 KB/MS [Disabled]

Enable or disable PS/2 Keyboard/Mouse to generate a wake event.
Conguration options: [Disabled] [Enabled]

Power On From S5 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, RTC Alarm Hour, RTC Alarm Minute, and RTC Alarm

Second appear with set values. Conguration options: [Disabled] [Enabled]

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2-18 Chapter 2: BIOS information

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 most six letters and/or

numbers, then press <Enter>.

Full Screen Logo [Enabled]

This allows you to enable or disable the full screen logo display feature. Conguration
options: [Disabled] [Enabled]

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 Device] [Hard Drive] [ATAPI CD­ROM ] [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]

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ASUS M4A785D-M PRO 2-19

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 most 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]

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.

3. Conrm the password when prompted.

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> twice. The message “Password Uninstalled” appears.

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2-20 Chapter 2: BIOS information

2.7 Tools menu

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.

ASUS EZ Flash 2

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

AI NET2

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)

BIOS SETUP UTILITY

Main Advanced Power Boot Tools Exit

2.7.3 AI NET 2

Check Realtek LAN cable [Disabled]

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

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

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: [Enabled] [Disabled] [Auto]

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]

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.

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ASUS M4A785D-M PRO 2-21

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.

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.

2.8 Exit menu

Pressing <Esc> does not immediately exit this menu. Select one of the options from this
menu or <F10> from the legend bar to exit.

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.

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.

Exit Options

Exit & Save Changes

Exit & Discard Changes
Discard Changes

Load Setup Defaults

Exit system setup
after saving the
changes.

F10 key can be used
for this operation.

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2-22 Chapter 2: BIOS information

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