ASROCK A785GMH-128M User Manual

No part of this installation guide may be reproduced, transcribed, transmitted, or translated in any language, in any form or by any means, except duplication of documentation by the purchaser for backup purpose, without written consent of ASRock Inc. Products and corporate names appearing in this guide may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation and to the owners’ benefit, without intent to infringe.

Disclaimer:Disclaimer:

Disclaimer:

Disclaimer:Disclaimer:

Specifications and information contained in this guide are furnished for informational use only and subject to change without notice, and should not be constructed as a commitment by ASRock. ASRock assumes no responsibility for any errors or omissions that may appear in this guide. With respect to the contents of this guide, ASRock does not provide warranty of any kind, either expressed or implied, including but not limited to the implied warranties or conditions of merchantability or fitness for a particular purpose. In no event shall ASRock, 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 data, interruption of business and the like), even if ASRock has been advised of the possibility of such damages arising from any defect or error in the guide or product.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that

may cause undesired operation.

CALIFORNIA, USA ONLY

The Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance controlled in Perchlorate Best Management Practices (BMP) regulations passed by the California Legislature. When you discard the Lithium battery in California, USA, please follow the related regulations in advance. “Perchlorate Material-special handling may apply, see www.dtsc.ca.gov/hazardouswaste/perchlorate”

ASRock Website: http://www.asrock.com

Published August 2009

ASRock A785GMH/128M Motherboard

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Motherboard LayoutMotherboard Layout

Motherboard Layout

Motherboard LayoutMotherboard Layout

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1 PS2_USB_PW1 Jumper 18 System Panel Header (PANEL1, Orange) 2 ATX 12V Power Connector (ATX12V1) 19 Chassis Speaker Header 3 CPU Fan Connector (CPU_FAN1) (SPEAKER 1, Purple) 4 CPU Heatsink Retention Module 20 USB 2.0 Header (USB6_7, Blue) 5 AM2 940-Pin CPU Socket 2 1 USB 2.0 Header (USB8_9, Blue) 6 2 x 240-pin DDR2 DIMM Slots 22 SPI Flash Memory (8Mb)

(Dual Channel A: DDRII_1, DDRII_2; Yellow) 23 USB 2.0 Header (USB10_11, Blue)

7 2 x 240-pin DDR2 DIMM Slots 24 Clear CMOS Jumper (CLRCMOS1)

(Dual Channel B: DDRII_3, DDRII_4; Orange) 25 Floppy Connector (FLOPPY1) 8 ATX Power Connector (ATXPWR1) 26 Serial Port Connector (COM1) 9 Primary IDE Connector (IDE1, Blue) 27 Internal Audio Connector: CD1 (Black) 10 Sixth SATAII Connector (SATAII_6 (PORT 5)) 28 Front Panel Audio Header 11 Fifth SATAII Connector (SATAII_5 (PORT 4)) (HD_AUDIO1, Lime) 12 Southbridge Controller 29 Infrared Module Header (IR1) 13 Chassis Fan Connector (CHA_FAN1) 30 PCI Slots (PCI1- 2) 14 Fourth SATAII Connector (SATAII_4 (PORT 3)) 31 PCI Express 2.0 x16 Slot (PCIE2; Green) 15 Third SATAII Connector (SATAII_3 (PORT 2)) 32 Northbridge Controller 16 Secondary SATAII Connector 33 PCI Express 2.0 x1 Slot (PCIE1; Green)

(SA TAII_2 (PORT 1)) 34 Power Fan Connector (PWR_FAN1) 17 Primary SATAII Connector (SATAII_1 (PORT 0))

ASRock A785GMH/128M Motherboard

I/O PI/O P

I/O P

I/O PI/O P

* 3 LAN RJ-45 Port 11 USB 2.0 Ports (USB23)

** 8 Front Speaker (Lime)

* There are two LED next to the LAN port. Please refer to the table below for the LAN port LED indications.

anelanel

anel

anelanel

1 PS/2 Mouse Port (Green) 9 Microphone (Pink) 2 VGA/D-Sub Port 10 USB 2.0 Ports (USB 01)

4 Side Speaker (Gray) 12 Optical SPDIF Out Port 5 Rear Speaker (Black) *** 13 HDMI Port 6 Central / Bass (Orange) 14 VGA/DVI-D Port 7 Line In (Light Blue) 15 PS/2 Keyboard Port (Purple)

Activity/Link LED SPEED LED

Status Description Status Description

Off No Link Off 10Mbps connection Blinking Data Activity Orange 100Mbps connection On Link Green 1Gbps connection

LAN Port LED Indications

ACT/LINK LED

LAN Port

SPEED LED

** If you use 2-channel speaker, please connect the speaker’s plug into “Front Speaker Jack”.

See the table below for connection details in accordance with the type of speaker you use.

TABLE f or Audio Output Connection

Audio Output Channels Front Speaker Rear Sp eaker Central / Bass Side Speaker

(No. 8) (No. 5) (No. 6) (No. 4) 2 V -- -- -4VV---6 VVV-8 VVVV

ASRock A785GMH/128M Motherboard

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To enable Multi-Streaming function, you need to connect a front panel audio cable to the front panel audio header. After restarting your computer, you will find “VIA HD Audio Deck” tool on your system. Please follow below instructions according to the OS you install. For Windows® XP / XP 64-bit OS: Please click “VIA HD Audio Deck” icon , and click “Speaker”. Then you are allowed to

select “2 Channel”, “4 Channel”, “6 Channel” or “8 Channel”. Click “Power” to save your change. For Windows® VistaTM / VistaTM 64-bit OS: Please click “VIA HD Audio Deck” icon , and click “Advanced Options” on the left side

on the bottom. In “Advanced Options” screen, select “Independent Headphone”, and click “OK” to save your change.

If you enable Multi-Streaming function, Side Speaker function will be disabled. You can only choose to enable either Multi-Streaming function or Side Speaker function.

*** To support AC3 audio format with HDMI Audio under VistaTM, please install the HDMI audio driver in XP support CD AAX785H-10. The driver is located under the path: ..\Drivers\NB Audio\REALTEK\XP64_XP(R1.68) And note for LPCM support up to stereo 2 channels only.

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ASRock A785GMH/128M Motherboard

1.1.

IntroductionIntroduction

Introduction

1.1.

IntroductionIntroduction

Thank you for purchasing ASRock A785GMH/128M motherboard, a reliable motherboard produced under ASRock’s consistently stringent quality control. It delivers excellent performance with robust design conforming to ASRock’s commitment to quality and endurance. In this manual, cha pter 1 a nd 2 contain introduction of the motherboard a nd step-by-step guide to the hardware installation. Chapter 3 and 4 contain the configuration guide to BIOS setup and information of the Support CD.

Because the motherboard specifications and the BIOS software might be updated, the content of this manual will be subject to change without notice. In case any modifications of this manual occur, the updated version will be available on ASRock website without further notice. You may find the latest VGA cards and CPU support lists on ASRock website as well. ASRock website http://www.asrock.com If you require technical support related to this motherboard, please visit our website for specific information about the model you are using.

www.asrock.com/support/index.asp

1.11.1

Package ContentsPackage Contents

1.1

Package Contents

1.11.1

Package ContentsPackage Contents

1 x ASRock A785GMH/128M Motherboard

(Micro ATX Form Factor: 9.6-in x 8.6-in, 24.4 cm x 21.8 cm) 1 x ASRock A785GMH/128M Quick Installation Guide 2 x ASRock A785GMH/128M Support CD 1 x Ultra ATA 66/100/133 IDE Ribbon Cable (80-conductor) 2 x Serial ATA (SATA) Data Cables (Optional) 1 x I/O Panel Shield

ASRock A785GMH/128M Motherboard

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1.21.2

SpecificationsSpecifications

1.2

Specifications

1.21.2

SpecificationsSpecifications

Platform - Micro ATX Form Factor: 9.6-in x 8.6-in, 24.4 cm x 21.8 cm

- Solid Capacitor for CPU power

CPU - Support for Socket AM2+ / AM2 processors: AMD Phenom

FX / Phenom / Athlon 64 FX / Athlon 64 X2 Dual-Core / Athlon X2 Dual-Core / Athlon 64 / Sempron processor

- Support for AM3 processors: AMD PhenomTM II X4 / X3 / X2 and Athlon II X4 / X3 / X2 processors

- Supports AMD OverDriveTM with ACC feature (Advanced Clock Calibration)

- AMD LIVE!TM Ready

- Supports AMD’s Cool ‘n’ QuietTM Technology

- FSB 2600 MHz (5.2 GT/s)

- Supports Untied Overclocking Technology (see CAUTION 1)

- Supports Hyper-Transport 3.0 (HT 3.0) Technology

Chipset - Northbridge: AMD 785G

- Southbridge: AMD SB710

Memory - Dual Channel DDR2 Memory T echnology (see CAUTION 2)

- 4 x DDR2 DIMM slots

- Support DDR2 1066/800/667/533 non-ECC, un-buffered memory (see CAUTION 3)

- Max. capacity of system memory: 16GB (see CAUTION 4)

Expansion Slot - 1 x PCI Express 2.0 x16 slot (green @ x16 mode)

- 1 x PCI Express 2.0 x1 slot

- 2 x PCI slots

- Supports Hybrid CrossFireX

Graphics - Integrated AMD Radeon HD 4200 graphics

- DX10.1 class iGPU, Shader Model 4.1

- Max. shared memory 512MB (see CAUTION 5)

- Integrated 128MB side port memory for iGPU

- Three VGA Output options: D-Sub, D VI-D and HDMI

- Supports HDCP function

- Supports Full HD 1080p Blu-ray (BD) / HD-DVD playback (see CAUTION 6)

Audio - 7.1 CH Windows® VistaTM Premium Level HD Audio

(VIA® VT1708S Audio Codec)

LAN - PCIE x1 Gigabit LAN 10/100/1000 Mb/s

- Realtek RTL81 11DL

- Supports Wake-On-LAN

ASRock A785GMH/128M Motherboard

Rear Panel I/O I/O Panel

- 1 x PS/2 Mouse Port

- 1 x PS/2 Keyboard Port

- 1 x VGA/D-Sub Port

- 1 x VGA/DVI-D Port

- 1 x HDMI Port

- 1 x Optical SPDIF Out Port

- 4 x Ready-to-Use USB 2.0 Ports

- 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)

- HD Audio Jack: Side Speaker/Rear Speaker/Central/Bass/ Line in/Front Speaker/Microphone (see CAUTION 7)

Connector - 6 x Serial ATAII 3.0Gb/s connectors, support RAID (RAID 0,

RAID 1, RAID 10 and JBOD), NCQ, AHCI and “Hot Plug” functions (see CAUTION 8)

- 1 x ATA133 IDE connector (supports 2 x IDE devices)

- 1 x Floppy connector

- 1 x IR header

- 1 x COM port header

- CPU/Chassis/Power FAN connector

- 24 pin ATX power connector

- 4 pin 12V power connector

- CD in header

- Front panel audio connector

- 3 x USB 2.0 headers (support 6 USB 2.0 ports) (see CAUTION 9)

BIOS Feature - 8Mb AMI BIOS

- AMI Legal BIOS

- Supports “Plug and Play”

- ACPI 1.1 Compli ance Wa ke Up Events

- Supports jumperfree

- SMBIOS 2.3.1 Support

- VCCM, NB V oltage Multi-adjustment

- Supports Smart BIOS

Support CD - Drivers, Utilities, AntiVirus Software (Trial V ersion), AMD

OverDriveTM Utility, AMD Live! Explorer, AMD Fusion

Unique Feature - ASRock OC Tuner (see CAUTION 10)

- Intelligent Energy Saver (see CAUTION 11)

- Instant Boot

- ASRock Instant Flash (see CAUTION 12)

- ASRock OC DNA (see CAUTION 13)

- Hybrid Booster:

- CPU Frequency Stepless Control (see CAUTION 14)

ASRock A785GMH/128M Motherboard

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- ASRock U-COP (see CAUTION 15)

- Boot Failure Guard (B.F.G.)

- ASRock AM2 Boost: ASRock Patented Technology to boost

memory performance up to 12.5% (see CAUTION 16) Hardware - CPU Temperature Sensing Monitor - Chassis Temperature Sensing

- CPU/Chassis/Power Fan Tachometer

- CPU Quiet Fan

- Voltage Monitoring: +12V, +5V, +3.3V, Vcore

OS - Microsoft® Windows® XP / XP Media Center / XP 64-bit /

Vista

/ VistaTM 64-bit / Win7 compliant

Certifications - FCC, CE, WHQL

- EuP Ready (EuP ready power supply is required) (see CAUTION 17)

* For detailed product information, please visit our website: http://www.asrock.com

WARNING

Please realize that there is a certain risk involved with overclocking, including adjusting the setting in the BIOS, applying Untied Overclocking Technology, or using the thirdparty overclocking tools. Overclocking may affect your system stability, or even cause damage to the components and devices of your system. It should be done at your own risk and expense. We are not responsible for possible damage caused by overclocking.

CAUTION!

1. This motherboard supports Untied Overclocking Technology. Please rea d “U ntied Overclocking Technology” on page 29 for details.

2. This motherboard supports Dual Channel Memory Technology. Before you implement Dual Channel Memory Technology, make sure to read the installation guide of memory modules on page 15 for proper installation.

3. Whether 1066MHz memory speed is supported depends on the AM2+ CPU you adopt. If you want to adopt DDR2 1066 memory module on this motherboard, please refer to the memory support list on our website for the compatible memory modules. ASRock website http://www.asrock.com

4. Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows® XP and Windows® VistaTM. For Windows® XP 64-bit and Windows® VistaTM 64bit with 64-bit CPU, there is no such limitation.

5. The maximum shared memory size is defined by the chipset vendor and is subject to change. Please check AMD website for the latest information.

ASRock A785GMH/128M Motherboard

6. 1080p Blu-ray (BD) / HD-DVD playback support on this motherboard requires the proper hardware configuration. Please refer to page 11 and 12 for the minimum hardware requirement and the passed 1080p Blu-ray (BD) / HD-DVD films in our lab test.

7. For microphone input, this motherboard supports both stereo and mono modes. For audio output, this motherboard supports 2-channel, 4-channel, 6-channel, and 8-channel mode s. Please check the table on page 3 for proper connection.

8. Before installing SATAII hard dis k to SATAII connector, please re ad the “SATAII Hard Disk Setup Guide” on page 31 of “User Manual” in the support CD to adjust your SA TAII hard disk drive to SATAII mode. You can also connect SATA hard disk to SATAII connector directly.

9. Power Management for USB 2.0 works fine under Microsoft® Windows VistaTM 64-bit / VistaTM / XP 64-bit / XP SP1 or SP2.

10. It is a user-friendly ASRock overclocking tool which allows you to surveil your system by hardware monitor function and overclock your hardware devices to get the best system performance under Windows® environment. Please visit our website for the operation procedures of ASRock OC Tuner. ASRock website: http://www.asrock.com

11. Featuring an advanced proprietary hardware and software design, Intelligent Energy Saver is a revolutionary technology that delivers unparalleled power savings. The voltage regulator can reduce the number of output phases to improve efficiency when the CPU cores are idle. In other words, it is able to provide exceptional power saving and improve power efficiency without sacrificing computing performance. To use Intelligent Energy Saver function, please enable Cool ‘n’ Quiet option in the BIOS setup in advance. Please visit our website for the operation procedures of Intelligent Energy Saver. ASRock website: http://www.asrock.com

12. ASRock Instant Flash is a BIOS flash utility embedded in Flash ROM. This convenient BIOS update tool allows you to update system BIOS without entering operating systems first like MS-DOS or Windows®. With this utility, you can press <F6> key during the POST or press <F2> key to BIOS setup menu to access ASRock Instant Flash. Just launch this tool and save the new BIOS file to your USB flash drive, floppy disk or hard drive, then you can update your BIOS only in a few clicks without preparing an additional floppy diskette or other complicated flash utility. Please be noted that the USB flash drive or hard drive must use FAT32/16/12 file system.

13. The software name itself – OC DNA literally tells you what it is capable of. OC DNA, an exclusive utility developed by ASRock, provides a convenient way for the user to record the OC settings and share with others. It helps you to save your overclocking record under the operating system and simplifies the complicated recording process of overclocking settings. With OC DNA, you can save your OC settings as a profile and share with your friends! Your friends then can load the OC profile to their own system to get the same OC settings as yours! Please be noticed that the OC profile can only be shared and worked on the same motherboard.

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ASRock A785GMH/128M Motherboard

14. Although this motherboard offers stepless control, it is not recommended

to perform over-clocking. Frequencies other than the recommended CPU bus frequencies may cause the instability of the system or damage the CPU.

15. While CPU overheat is detected, the system will automatically shutdown.

Before you resume the system, please check if the CPU fan on the motherboard functions properly and unplug the power cord, then plug it back again. To improve heat dissipation, remember to spray thermal grease between the CPU a nd the he atsink when you in stall the PC system.

16. This motherboard supports ASRock AM2 Boost overclocking technology. If

you enable this function in the BIOS setup, the memory performance will improve up to 12.5%, but the effect still depends on the AM2 CPU you adopt. Enabling this function will overclock the chipset/CPU reference clock. However, we can not guarantee the system stability for all CPU/DRAM configurations. If your system is unstable after AM2 Boost function is enabled, it may not be applicative to your system. You may choose to disable this function for keeping the stability of your system.

17. EuP, stands for Energy Using Product, wa s a provision regulated by European

Union to define the power consumption for the completed system. According to EuP, the total AC power of the completed system shall be under 1.00W in off mode condition. To meet EuP standard, an EuP ready motherboard a nd an EuP ready power supply are required. According to Intel’s suggestion, the EuP ready power supply must meet the standard of 5v standby power efficiency is higher than 50% under 100 mA current consumption. For EuP ready power supply selection, we recommend you checking with the power supply manufacturer for more details.

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1.31.3

Minimum Hardware Requirement for 1080p Blu-rayMinimum Hardware Requirement for 1080p Blu-ray

1.3

Minimum Hardware Requirement for 1080p Blu-ray

1.31.3

Minimum Hardware Requirement for 1080p Blu-rayMinimum Hardware Requirement for 1080p Blu-ray (BD) / HD(BD) / HD

(BD) / HD

(BD) / HD(BD) / HD

1080p Blu-ray (BD) / HD-DVD playba ck support on this motherboard requires the proper hardware configuration. Plea se refer to below table for the minimum hardware requirement.

CPU AMD Sempron Dual Core 2100 VGA Onboard VGA with DVI-D port Memory Dual Channel DDR2 533, 1GB x 2 Suggested OS Windows® VistaTM or Windows® VistaTM 64

* If you need to use CyberLink PowerDVD Ultra version 7.3, we suggest to disable Hardware Acceleration function for better playback performance and compatibility. After executing CyberLink PowerDVD Ultra program, please follow below steps to disable Hardware Acceleration function. A. Right-click the main page of CyberLink PowerDVD Ultra program. B. Click “Configuration”. C. Select “Video”. D. Click “Enable hardware acceleration (ATI Avivo)” to remove the “V” mark in this item. E. Click “OK” to save the change. * Currently, 1080p Blu-ray (BD) / HD-DVD playback is only supported under Windows VistaTM / VistaTM 64-bit OS. If you install Windows® XP / XP 64-bit OS, the function of 1080p Blu-ray (BD) / HD-DVD playback is not available, please visit our website for AMD 785G VGA driver update in the future. ASRock website http://www.asrock.com

-D-D

VD Playback SupporVD Playback Suppor

-D

VD Playback Suppor

-D-D

VD Playback SupporVD Playback Suppor

ASRock A785GMH/128M Motherboard

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1.41.4

1.4

1.41.4

assed 1080p Blu-ray (BD) / HDassed 1080p Blu-ray (BD) / HD

assed 1080p Blu-ray (BD) / HD

assed 1080p Blu-ray (BD) / HDassed 1080p Blu-ray (BD) / HD

estest

est

estest

DVD Film Name Format Producer Type Blu-ray SWORDFISH VC-1 WB DVD UNDERWORLD EVOLUTION MPEG-2 SONY

THE LAST STAND MPEG-4-AVC FOX CASINO ROYALE MPEG-4-AVC SONY THE LEAGUE OF MPEG-4-AVC FOX

EXTRAORDINARY GENTLEMEN HD- KING KONG VC-1 UNIVERSAL DVD NEW ORLEANS CONCERT MPEG-2 WEA

THE INTERPRETER MPEG-4-AVC UNIVERSAL

* MPEG-4-AVC mentioned above refers to the same format of H.264. * Above passed films are tested under below configuration. Items Configurations CPU AMD Sempron Dual Core 2100 VG A Onboard VGA with DVI-D port Memory Dual Channel DDR2 533, 1GB x 2 OS Windows® VistaTM or Windows® VistaTM 64 Playback Software CyberLink PowerDVD Ultra (Version 7.3 or above) DVD Player Pioneer BDR-101A / LG GBW-H10N (BD)

HP HD100 (HD-DVD)

-D-D

-D

-D-D

VD FVD F

VD F

VD FVD F

ilms in Our Lilms in Our L

ilms in Our L

ilms in Our Lilms in Our L

abab

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2.2.

InstallationInstallation

Installation

2.2.

InstallationInstallation

This is a Micro ATX form fa ctor (9.6-in x 8.6-in, 24.4 cm x 21.8 cm) motherboard. Before you install the motherboard, study the configuration of your chassis to ensure that the motherboard fits into it.

Pre-installation PrecautionsPre-installation Precautions

Pre-installation Precautions

Pre-installation PrecautionsPre-installation Precautions

Take note of the following precautions before you install motherboard components or change any motherboard settings.

Before you install or remove any component, ensure that the power 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, and/or components.

1. Unplug the power cord from the wall socket before touching any component.

2. To avoid damaging the motherboard components due to static electricity, NEVER place your motherboard directly on the carpet or the like. Also remember to use a grounded wrist strap or touch a safety grounded object before you handle components.

3. Hold components by the edges and do not touch the ICs.

4. Whenever you uninstall any component, place it on a grounded antistatic pad or in the bag that comes with the component.

5. When placing screws into the screw holes to secure the motherboard to the chassis, please do not over-tighten the screws! Doing so may damage the motherboard.

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2.12.1

CPU InstallationCPU Installation

2.1

CPU Installation

2.12.1

CPU InstallationCPU Installation

Step 1. Unlock the socket by lifting the lever up to a 90

angle.

Step 2. Position the CPU directly above the socket such that the CPU corner with

the golden triangle matches the socket corner with a small triangle.

Step 3. Carefully insert the CPU into the socket until it fits in place.

The CPU fits only in one correct orientation. DO NOT force the CPU into the socket to avoid bending of the pins.

Step 4. When the CPU is in place, press it firmly on the socket while you push

down the socket lever to secure the CPU. The lever clicks on the side tab to indicate that it is locked.

Lever 90° Up

CPU Golden Triangle

Socker Corner Small Triangle

STEP 1: Lift Up The Socket Lever

2.22.2

Installation of CPU Fan and HeatsinkInstallation of CPU Fan and Heatsink

2.2

Installation of CPU Fan and Heatsink

2.22.2

Installation of CPU Fan and HeatsinkInstallation of CPU Fan and Heatsink

STEP 2 / STEP 3: Match The CPU Golden Triangle To The Socket Corner Small Triangle

STEP 4: Push Down And Lock The Socket Lever

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After you install the CPU into this motherboard, it is necessary to install a larger heatsink and cooling fan to dissipate heat. You also need to spray thermal grease between the CPU and the heatsink to improve heat dissipation. Make sure that the CPU and the heatsink are securely fastened and in good contact with each other. Then connect the CPU fan to the CPU FAN connector (CPU_FAN1, see Page 2, No. 3). For proper installation, please kindly refer to the instruction manuals of the CPU fan and the heatsink.

ASRock A785GMH/128M Motherboard

2.3 Installation of Memor2.3 Installation of Memor

2.3 Installation of Memor

2.3 Installation of Memor2.3 Installation of Memor

This motherboard provides four 240-pin DDR2 (Double Data Rate 2) DIMM slots, and supports Dual Channel Memory Technology. For dual channel configuration, you always need to install identical (the same brand, speed, size and chip-type) DDR2 DIMM pair in the slots of the same color. In other words, you have to install identical DDR2 DIMM pair in Dual Cha nnel A (DDRII_1 a nd DDRII_2; Yellow slots; see p.2 No.6) or identical DDR2 DIMM pair in Dual Channel B (DDRII_3 and DDRII_4; Orange slots; see p.2 No.7), so that Dual Channel Me mory T echnology can be a ctivated. This motherboard also allows you to install f our DD R2 DIMMs f or dual channel configuration, and please install identical DDR2 DIMMs in all four slots. Y ou may refer to the Dual Channel Memory Configuration Table below.

Dual Channel Memory Configurations

DDRII_1 DDRII_2 DDRII_3 DDRII_4

(Y ellow Slot) (Yellow Slot) (Orange Slot) (Orange Slot) (1) Populated Populated - (2) - - Populated Populated (3)* Populated Populated Populated Populated

y Modules (DIMM)y Modules (DIMM)

y Modules (DIMM)

y Modules (DIMM)y Modules (DIMM)

* For the configuration (3), please install identical DD R2 DIMM s in all f our slots.

1. If you want to install two memory modules, for optimal compatibility and reliability, it is recommended to install them in the slots of the same color. In other words, install them either in the set of yellow slots (DDRII_1 and DDRII_2), or in the set of orange slots (DDRII_3 and DDRII_4).

2. If only one memory module or three memory modules are installed in the DDR2 DIMM slots on this motherboard, it is unable to activate the Dual Channel Memory Technology.

3. If a pair of memory modules is NOT installed in the same Dual Channel, for example, installing a pair of memory modules in DDRII_1 and DDRII_3, it is unable to activate the Dual Channel Memory Technology .

4. It is not allowed to install a DDR memory module into DDR2 slot; otherwise, this motherboard and DIMM may be damaged.

5. If you adopt DDR2 1066 memory modules on this motherboard, it is recommended to install them on DDRII_3 and DDRII_4 slots.

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Installing a DIMMInstalling a DIMM

Installing a DIMM

Installing a DIMMInstalling a DIMM

Please make sure to disconnect power supply before adding or removing DIMMs or the system components.

Step 1. Unlock a DIMM slot by pressing the retaining clips outward. Step 2. Align a DIMM on the slot such that the notch on the DIMM matches the break

on the slot.

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The DIMM only fits in one correct orientation. It will cause permanent damage to the motherboard and the DIMM if you force the DIMM into the slot at incorrect orientation.

Step 3. Firmly insert the DIMM into the slot until the retaining clips at both ends fully

snap back in place and the DIMM is properly seated.

ASRock A785GMH/128M Motherboard

2.4 Expansion Slots (PCI and PCI Express Slots)2.4 Expansion Slots (PCI and PCI Express Slots)

2.4 Expansion Slots (PCI and PCI Express Slots)

2.4 Expansion Slots (PCI and PCI Express Slots)2.4 Expansion Slots (PCI and PCI Express Slots)

There are 2 PCI slots and 2 PCI Express slots on this motherboard. PCI slots: PCI slots are used to install expansion cards that have the 32-bit PCI

interface.

PCIE slots:

PCIE1 (PCIE x1 slot; Green) is used for PCI Expre ss cards with x1 lane width cards, such as Gigabit LAN card, SAT A2 card, etc. PCIE2 (PCIE x16 slot; Green) is used f or PCI Expre ss cards with x16 lane width gra phics cards.

Installing an expansion cardInstalling an expansion card

Installing an expansion card

Installing an expansion cardInstalling an expansion card

Step 1. Before installing the expa nsion card, please make sure that the power supply

is switched off or the power cord is unplugged. Plea se read the documentation of the expansion card a nd ma ke necessary hardware settings for the card before you start the installation.

Step 2. Remove the bracket facing the slot that you intend to use. Kee p the screws

for later use.

Step 3. Align the card connector with the slot and press firmly until the card is com-

pletely seated on the slot.

Step 4. Fasten the card to the chassis with screws.

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2.5 Dual Monitor and Surround Display Features2.5 Dual Monitor and Surround Display Features

2.5 Dual Monitor and Surround Display Features

2.5 Dual Monitor and Surround Display Features2.5 Dual Monitor and Surround Display Features

Dual Monitor Feature

This motherboard supports dual monitor feature. With the internal VGA output support (DVI-D, D-Sub and HDMI), you can easily enjoy the benefits of dual monitor feature without installing any add-on VGA card to this motherboard. This motherboard also provides independent display controllers for DVI-D, D-Sub or HDMI to support dual VGA output so that DVI-D, D-sub or HDMI can drive same or different display contents. To enable dual monitor feature, please follow the below steps:

1. Connect DVI-D monitor cable to VGA/DVI-D port on the I/O panel, connect D-Sub monitor cable to VGA/D-Sub port on the I/O panel, or connect HDMI monitor cable to HDMI port on the I/O panel.

VGA/D-Sub port

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VGA/D VI-D port

DVI-D and HDMI monitors cannot display at the same time. You can only choose the combination for dual monitor output support: DVI-D + D-Sub or HDMI + D-Sub.

2. If you have installed onboard VGA driver from our support CD to your system already, you can freely enjoy the benefits of multi monitor function after your system boots. If you haven’t installed onboard VGA driver yet, please install onboard VGA driver from our support CD to your system and restart your computer. Then you can start to use multi monitor function on this motherboard.

When you playback HDCP-protected video from Blu-ray (BD) or HD-DVD disc, the content will be displayed only in one of the three monitors instead of all monitors.

ASRock A785GMH/128M Motherboard

HDMI port

Surround Display Feature

This motherboard supports surround display upgrade. With the internal VGA output support (DVI-D, D-Sub and HDMI) and external add-on PCI Express VGA card, you can easily enjoy the benefits of surround display feature. Please refer to the following steps to set up a surround display environment:

1. Install the ATITM PCI Express VGA cards on PCIE2 slot. Please refer to page 17 for proper expansion card installation procedures for details.

2. Connect DVI-D monitor cable to VGA/DVI-D port on the I/O panel, connect D-Sub monitor cable to VGA/D-Sub port on the I/O panel, or connect HDMI monitor cable to HDMI port on the I/O panel. Then connect other monitor cables to the corresponding connectors of the add-on PCI Express VGA cards on PCIE2 slot.

DVI-D and HDMI monitors cannot display at the same time. You can only choose the combination: DVI-D + D-Sub or HDMI + D-Sub.

3. Boot your system. Press <F2> to enter BIOS setup. Enter “Share Memory” option to adjust the memory capability to [32MB], [64MB], [128MB] [256MB] or [512MB] to enable the function of VGA/D-sub. Please make sure that the value you select is less than the total capability of the system memory. If you do not adjust the BIOS setup, the default value of “Share Memory”, [Auto], will disable VGA/D-Sub function when the add-on VGA card is inserted to this motherboard.

4. Install the onboard VGA driver and the add-on PCI Express VGA card driver to your system. If you have installed the drivers already, there is no need to install them again.

5. Set up a multi-monitor display.

For Windows® XP / XP 64-bit OS:

Right click the desktop, choose “Properties”, and select the “Settings” tab so that you can adjust the parameters of the multi-monitor according to the steps below. A. Click the “Identify” button to display a large number on each monitor. B. Right-click the display icon in the Display Properties dialog that you wish to be your primary monitor, and then select “Primary”. When you use multiple monitors with your card, one monitor will always be Primary, and all additional monitors will be designated as Secondary. C. Select the display icon identified by the number 2. D. Click “Extend my Windows desktop onto this monitor”. E. Right-click the display icon and select “Attached”, if necessary. F. Set the “Screen Resolution” and “Color Quality” as appropriate for the second monitor. Click “Apply” or “OK” to apply these new values.

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G. Repeat steps C through E for the diaplay icon identified by the number one, two, three and four.

For Windows® VistaTM / VistaTM 64-bit OS:

Right click the desktop, choose “Personalize”, and select the “Display Settings” tab so that you can adjust the parameters of the multi-monitor according to the steps below. A. Click the number ”2” icon. B. Click the items “This is my main monitor” and “Extend the desktop onto this monitor”. C. Click “OK” to save your change. D. Repeat steps A through C for the display icon identified by the number

three and four.

6. Use Surround Display. Click and drag the display icons to positions representing the physical setup of your monitors that you would like to use. The placement of display icons determines how you move items from one monitor to another.

HDCP Function

HDCP function is supported on this motherboard. To use HDCP function with this motherboard, you need to adopt the monitor that supports HDCP function as well. Theref ore, you ca n enjoy the superior display quality with high-definition HDCP encryption contents. Plea se refer to below instruction for more details about HDCP function.

What is HDCP?

HDCP stands f or High-Ba ndwidth Digital Content Protection, a specification developed by Intel® for protecting digital entertainment content that uses the DVI interface. HDCP is a copy protection scheme to eliminate the possibility of intercepting digital data midstream between the video source, or transmitter - such as a computer, DVD player or set-top box - and the digital display, or receiver - such as a monitor, television or projector. In other words, HDCP specification is designed to protect the integrity of content as it is being transmitted.

2020

Products compatible with the HDCP scheme such a s DVD players, satellite and cable HDTV set-top-boxes, as well a s few entertainment PCs requires a secure connection to a compliant display. Due to the increase in manufacturers employing HDCP in the ir equipment, it is highly recommended that the HDTV or LCD monitor you purchase is compatible.

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This motherboard supports ATITM Hybrid CrossFireXTM feature. A TITM Hybrid CrossFireXTM brings multi-GPU performance capabilities by enabling an AMD 785G integrated graphics processor and a discrete graphics processor to operate simultaneously with combined output to a single display for blisteringly-fast frame rates. Currently, ATITM Hybrid CrossFireXTM Technology is only supported with Windows® Vista ATITM Hybrid CrossFireXTM may be supported with Windows® XP OS. Please visit our website for updated information.

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OS, and is not available with Windows® XP OS. In the future,

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What does an ATITM Hybrid CrossFireXTM system include?

An ATITM Hybrid CrossFireXTM system includes an ATITM RadeonTM 2400 or ATI RadeonTM 3450 series graphics processor and a motherboard based on an AMD 785G integrated chipset, all operating in a Windows® VistaTM environment. Please refer to below PCI Express graphics card support list for ATITM Hybrid CrossFireXTM. For the future update of more compatible PCI Express graphics cards, please visit our website for further information.

Vendor Chipset Model Driver

ATI RADEON X2400PRO MSI RX2400 PRO-TD256EH Catalyst 8.7

RADEON HD2400XT * POWERCOLOR HD2400 XT Catalyst 8.7

256MB DDR3

RADEON HD3450 POWERCOLOR AX3450 Catalyst 8.7

256MD2-S * Currently, RADEON HD2400XT series graphics cards are only supported with AMD Phenom CPU. Please visit our website for the future driver update and the latest information.

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Step 1. Install one compatible PCI Express graphics card to PCIE1 slot (green). For

the proper installation procedures, plea se refer to section “Expansion Slots”.

Step 2. Connect the monitor cable to the correspondent connector on the PCI

Express graphics card on PCIE2 slot.

Step 3. Boot your system. Press <F2> to enter BIOS setup. Enter “Advanced” screen,

and enter “Chipset Settings”. Then set the option “Surround View” to [Enabled].

Step 4. Boot into OS. Please remove the ATITM driver if you have any VGA driver

installed in your system.

Step 5. Install the onboard V GA driver from our support CD to your system f or both the

onboard V GA and the discrete graphics card.

Step 6. Restart your computer. Then you will find “ATI Catalyst Control Center” on

your Windows® taskbar.

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ATI Catalyst Control Center

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Step 7. Double-click “ATI Catalyst Control Center”. Click “View”, click “CrossFireTM”,

and then select the option “Ena ble CrossFireTM”.

View

CrossFire

Step 8. Click “Yes” to continue.

Step 9. Click “OK” to save your change.

Enable CrossFire

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Step 10. Reboot your system. Then you can freely enjoy the benefit of Hybrid

CrossFireXTM feature.

* Hybrid CrossFireXTM appearing here is a registered trademark of ATITM Technologies Inc., and is used only for identification or explanation and to the owners’ benefit, without intent to infringe. * For further information of ATITM Hybrid CrossFireXTM technology, please check AMD website for up dates and details.

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2.72.7

Jumpers SetupJumpers Setup

2.7

Jumpers Setup

2.72.7

Jumpers SetupJumpers Setup

The illustration shows how jumpers are setup. When the jumper cap is placed on pins, the jumper is “Short”. If no jumper cap is pla ced on pins, the jumper is “Open”. The illustration

shows a 3-pin jumper whose pin1 and pin2 are “Short” when jumper cap is pla ced on these 2 pins.

Jumper Setting

PS2_USB_PW1 Short pin2, pin3 to enable

(see p.2, No. 1) +5VSB (standby) for PS/2 or

USB wake up events.

Note: To select +5VSB, it requires 2 Amp and higher standby current provided by

power supply.

Clear CMOS Jumper

(CLRCMOS1) (see p.2, No. 24)

Note: CLRCMOS1 allows you to clear the data in CMOS. The data in CMOS includes

system setup information such as system password, date, time, and system setup parameters. To clear and reset the system parameters to default setup, please turn of f the computer and unplug the power cord from the power supply. After waiting for 15 seconds, use a jumper ca p to short pin2 and pin3 on CLRCMOS1 for 5 seconds. However , please do not clear the CMOS right after you update the BIOS. If you need to clear the CMOS when you just finish updating the BIOS, you must boot up the system first, and then shut it down before you do the clearCMOS action.

Clear CMOSDefault

OpenShort

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2.8 Onboard Headers and Connectors2.8 Onboard Headers and Connectors

2.8 Onboard Headers and Connectors

2.8 Onboard Headers and Connectors2.8 Onboard Headers and Connectors

Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over these headers and connectors. Placing jumper caps over the headers and connectors will cause permanent damage of the motherboard!

•

Floppy Connector

(33-pin FLOPPY1) (see p.2 No. 25)

the red-striped side to Pin1

Note: Make sure the red-striped side of the cable is plugged into Pin1 side of the

connector.

Primary IDE connector (Blue)

(39-pin IDE1, see p.2 No. 9)

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connect the blue end

to the motherboard

connect the black end to the IDE devices

80-conductor ATA 66/100/133 cable

Note: Pl e ase re fe r t o t h e in struction of your IDE device vendor for the details.

Serial AT AII Connectors These six Serial A TAII (SATAII)

(SATAII_1 (PORT 0): connectors support SA T AII see p.2, No. 17) or SATA hard dis k for intern al (SATAII_2 (PORT 1): storage devices. The current see p.2, No. 16) SATAII interface allows up to 3.0 (SATAII_3 (PORT 2): Gb/s data transfer rate.

see p.2, No. 15) (SATAII_4 (PORT 3): see p.2, No. 14) (SATAII_5 (PORT 4): see p.2, No. 11) (SATAII_6 (PORT 5): see p.2, No. 10)

SATAII_1 SATAII_2 (PORT 0) (PORT 1)

SATAII_5 SATAII_6 (PORT 4) (PORT 5)

SATAII_3 SATAII_4 (PORT 2) (PORT 3)

Serial AT A (SA T A) Either end of the SATA data ca ble Data Cable can be connected to the SATA /

(Optional) SATAII hard disk or the SA TAII

connector on this motherboard.

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USB 2.0 Headers Besides four default USB 2.0

(9-pin USB10_11) ports on the I/O panel, there are (see p.2 No. 23) three USB 2.0 headers on this

motherboard. Each USB 2.0 header can support two USB

2.0 ports.

(9-pin USB8_9) (see p.2 No. 21)

(9-pin USB6_7) (see p.2 No. 20)

Infrared Module Header This header supports an

(5-pin IR1) optional wireless transmitting (see p.2 No. 29) and receiving infrared module.

Internal Audio Connectors This connector allows you

(4-pin CD1) to receive stereo audio input (CD1: see p.2 No. 27) from sound sources such a s

CD1

a CD-ROM, D VD-ROM, TV tuner card, or MPEG card.

Front Panel Audio Header This is an interface for the front

(9-pin HD_AUDIO1) panel audio cable that allows (see p.2, No. 28) convenient connection and

control of audio devices.

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1. High Definition Audio supports Jack Sensing, but the panel wire on the chassis must support HDA to function correctly. Please follow the

instruction in our manual and chassis manual to install your system.

2. If you use AC’97 audio panel, please install it to the front panel audio header as below: A. Connect Mic_IN (MIC) to MIC2_L. B. Connect Audio_R (RIN) to OUT2_R and Audio_L (LIN) to OUT2_L.

C. Connect Ground (GND) to Ground (GND). D. MIC_RET and OUT_RET are for HD audio panel only. You don’t need to connect them for AC’97 audio panel. E. Enter BIOS Setup Utility. Enter Advanced Settings, and then select

Chipset Configuration. Set the Front Panel Control option from

[Auto] to [Enabled].

System Panel Hea der This header accommodates

(9-pin PANEL1) several system front panel (see p.2 No. 18) functions.

Chassis Spe aker He ader Please connect the chassis

(4-pin SPEAKER 1) speaker to this hea der. (see p.2 No. 19)

Chassis a nd Power Fa n Connectors Please connect the fan cable s

(3-pin CHA_FAN1) to the fan connectors a nd (see p.2 No. 13) match the black wire to the

ground pin.

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(3-pin PWR_FAN1) (see p.2 No. 34)

CPU Fan Connector Please connect the CPU fa n

(4-pin CPU_FAN1) cable to this connector and (see p.2 No. 3) match the black wire to the

4 3 2 1

ground pin.

Though this motherboard provides 4-Pin CPU fan (Quiet Fan) support, the 3-Pin CPU fan still can work successfully even without the fan speed control function. If you plan to connect the 3-Pin CPU fan to the CPU fan connector on this motherboard, please connect it to Pin 1-3.

Pin 1-3 Connected

3-Pin Fan Installation

ASRock A785GMH/128M Motherboard

ATX Power Conne ctor Please connect an A TX power

(24-pin ATXPWR1) supply to this connector. (see p.2 No. 8)

Though this motherboard provides 24-pin ATX power connector, it can still work if you adopt a traditional 20-pin ATX power supply.

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To use the 20-pin ATX power supply, please plug your power supply along with Pin 1 and Pin 13.

20-Pin ATX Power Supply Installation

ATX 12V Power Connector Please connect an A TX 12V

(4-pin ATX12V1) power supply to this connector. (see p.2 No. 2)

Serial port Header This COM1 header supports a

(9-pin COM1) serial port module. (see p.2 No.26)

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2.92.9

Driver Installation GuideDriver Installation Guide

2.9

Driver Installation Guide

2.92.9

Driver Installation GuideDriver Installation Guide

To install the drivers to your system, plea se in sert the support CD to your optical drive first. Then, the drivers compatible to your system ca n be auto-detected and listed on the support CD driver page. Please follow the order from up to bottom side to install those required drivers. Therefore, the drivers you install can work properly.

®®

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Installing WindowsInstalling Windows

2.10

Installing Windows

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Installing WindowsInstalling Windows

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If you want to install Windows® XP / XP 64-bit / VistaTM / VistaTM 64-bit on your SATA / SATAII HDDs with RAID functions, ple ase refer to the document at the following path in the Support CD for detailed procedures:

..\ RAID Installation Guide

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Installing WindowsInstalling Windows

2.11

Installing Windows

2.112.11

Installing WindowsInstalling Windows VistaVista

Vista

VistaVista

If you want to install Windows® XP, Windows® XP 64-bit, Windows® VistaTM or Windows VistaTM 64-bit OS on your SATA / SATAII HDDs without RAID functions, please follow below procedures according to the OS you install.

2.11.1 Installing Windows2.11.1 Installing Windows

2.11.1 Installing Windows

2.11.1 Installing Windows2.11.1 Installing Windows F F

F F

If you want to install Windows® XP or Windows® XP 64-bit on your SA TA / SATAII HDDs without RAID functions, please follow below steps.

Using SATA / SAT AII HDDs without NCQ a nd Hot Plug function s

STEP 1: Set up BIOS.

A. Enter BIOS SETUP UTILITY Advanced screen Storage Configuration. B. Set the “SATA Operation Mode” option to [IDE].

STEP 2: Install Windows® XP / Windows® XP 64-bit OS on your system.

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XP / XP 64-bit / Vista XP / XP 64-bit / Vista

XP / XP 64-bit / Vista

XP / XP 64-bit / Vista XP / XP 64-bit / Vista

ith RAID Fith RAID F

ith RAID F

ith RAID Fith RAID F

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XP / XP 64-bit / Vista

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ithout RAID Fithout RAID F

ithout RAID F

ithout RAID Fithout RAID F

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XP / XP 64-bit Without RAID

XP / XP 64-bit Without RAID XP / XP 64-bit Without RAID

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2.11.2 Installing Windows2.11.2 Installing Windows

2.11.2 Installing Windows

2.11.2 Installing Windows2.11.2 Installing Windows RAID F RAID F

RAID F

RAID F RAID F

If you want to install Windows® VistaTM or Windows® VistaTM 64-bit on your SATA / SATAII HDDs without RAID function s, please follow below steps.

Using SATA / SAT AII HDDs without NCQ a nd Hot Plug function s

STEP 1: Set up BIOS.

A. Enter BIOS SETUP UTILITY Advanced screen Storage Configuration. B. Set the “SATA Operation Mode” option to [IDE].

STEP 2: Install Windows® VistaTM / VistaTM 64-bit OS on your system.

unctionsunctions

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Using SATA / SATAII HDDs with NCQ and Hot Plug functions

STEP 1: Set Up BIOS.

A. Enter BIOS SETUP UTILITY Advanced screen Storage Configuration. B. Set the “SATA Operation Mode” option to [AHCI].

STEP 2: Install Windows® VistaTM / VistaTM 64-bit OS on your system.

Insert the Windows® VistaTM / Windows® VistaTM 64-bit optical disk into the optical drive to boot your system, and follow the instruction to install Windows® VistaTM / Windows VistaTM 64-bit OS on your system. When you see “Where do you want to install Windows? ” page, please insert the ASRock Support CD into your optical drive, a nd click the “Load Driver” button on the left on the bottom to load the AMD AHCI drivers. AMD AHCI drivers are in the following path in our Support CD: (There are two ASRock Support CD in the motherboard gift box pack, please choose the one for Windows® VistaTM / VistaTM 64-bit.)

.. \ I386 (For Windows® Vista .. \ AMD64 (For Windows® Vista

After that, please insert Windows® VistaTM / Windows® VistaTM 64-bit optical disk into the optical drive again to continue the installation.

2.122.12

Untied Overclocking TUntied Overclocking T

2.12

Untied Overclocking T

2.122.12

Untied Overclocking TUntied Overclocking T

This motherboard supports Untied Overclocking Technology, which means during overclocking, FSB enjoys better margin due to fixed PCI / PCIE buses. Before you enable Untied Overclocking function, plea se enter “Overclock Mode” option of BIOS setup to set the selection from [Auto] to [CPU, PCIE, Async.]. Therefore, CPU FSB is untied during overclocking, but PCI / PCIE buses are in the fixed mode so that FSB can operate under a more stable overclocking environment.

OS)

64-bit OS)

echnologyechnology

echnology

echnologyechnology

Please refer to the warning on page 8 for the possible overclocking risk before you apply Untied Overclocking Technology.

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3. BIOS Information3. BIOS Information

3. BIOS Information

3. BIOS Information3. BIOS Information

The Flash Memory on the motherboard stores BIOS Setup Utility. When you start up the computer, please press <F2> during the Power-On-Self-Test (POST) to enter BIOS Setup utility; otherwise, POST continues with its test routines. If you wish to enter BIOS Setup after POST, please restart the system by pressing <Ctl> + <Alt> + <Delete>, or pressing the reset button on the system chassis. The BIOS Setup program is designed to be user-friendly. It is a menu-driven program, which allows you to scroll through its various sub-menus and to select among the predetermined choices. For the detailed information about BIOS Setup, please refer to the User Manual (PDF file) contained in the Support CD.

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4. Sof4. Sof

4. Sof

4. Sof4. Sof

This motherboard supports various Microsoft® Windows® operating systems: XP / XP Media Center / XP 64-bit / VistaTM / VistaTM 64-bit / Win7. The Support CD that came with the motherboard contains necessary drivers and useful utilities that will enhance motherboard features. To begin using the Support CD, insert the CD into your CD-ROM drive. It will display the Main Menu automatically if “AUTORUN” is enabled in your computer. If the Main Menu does not appear automatically, locate and doubleclick on the file “ASSETUP.EXE” from the “BIN” folder in the Support CD to display the menus.

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