ASRock A7785GM 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 January 2010

ASRock A785GM Motherboard

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Motherboard LayoutMotherboard Layout

Motherboard Layout

Motherboard LayoutMotherboard Layout

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1 PS2_USB_PW1 Jumper 15 System Panel He ader (P ANEL1, Orange) 2 A TX 12V Power Connector (A TX12V1) 16 Secondary SAT AII Connector 3 CPU Heatsink Retention Module (SATAII_2 (PORT 1)) 4 AM2 940-Pin CPU Socket 17 Primary SAT AII Connector 5 2 x 240-pin DDR2 DIMM Slots (SATAII_1 (PORT 0))

(Dual Channel: DDRII_1, DDRII_2; Yellow) 18 USB 2.0 Header (USB4_5, Blue) 6 CPU Fan Connector (CPU_FAN1) 19 USB 2.0 Header (USB6_7, Blue) 7 ATX Power Connector (ATXPWR1) 20 Chassis Fan Connector (CHA_FAN1) 8 Chassis Speaker Header 21 Floppy Connector (FLOPPY1)

(SPEAKER 1, Purple) 22 Print Port Header (LPT1, Purple) 9 Clear CMOS Jumper (CLRCMOS1) 23 Front Panel Audio Header 10 Primary IDE Connector (IDE1, Blue) (HD_AUDIO1, Lime) 11 Northbridge Controller 24 PCI Slots (PCI1- 2) 12 Southbridge Controller 25 SPI Flash Memory (8Mb) 13 Third SAT AII Connector (SATAII_3 (PORT 2)) 26 PCI Express 2.0 x16 Slot (PCIE2; Blue) 14 Fourth SATAII Connector (SATAII_4 (PORT 3)) 27 PCI Express 2.0 x1 Slot (PCIE1; White)

ASRock A785GM Motherboard

I/O PI/O P

I/O P

I/O PI/O P

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1 PS/2 Mouse Port (Green) 6 Microphone (Pink) 2 USB 2.0 Ports (USB23) 7 USB 2.0 Ports (USB01) 3 RJ-45 Port 8 VGA Port 4 Line In (Light Blue) 9 COM Port 5 Line Out (Lime) 10 PS/2 Keyboard Port (Purple)

LAN Port LED Indications

Activity/Link LED SPEED LED

Status Description Status Description

Off No Activity Off 10Mbps connection Blinking Data Activity Green 100Mbps connection

* To enable Multi-Streaming function, you need to connect a front panel audio cable to the front panel audio header. Please refer to below steps for the software setting of Multi-Streaming. For Windows® XP: After restarting your computer, you will find “Mixer” tool on your system. Please select “Mixer ToolBox” , click “Enable playback multi-streaming”, and click “ok”. Choose “2CH” or

“4CH” and then you are allowed to select “Realtek HDA Primary output” to use Rear Speaker and Front Speaker, or select “Realtek HDA Audio 2nd output” to use front panel audio. Then reboot your system. For Windows® 7 / VistaTM: After restarting your computer, please double-click “Realtek HD Audio Manager” on the system tray. Set “Speaker Configuration” to “Quadraphonic” or “Stereo”. Click “Device advanced settings”, choose “Make front and rear output devices playbacks two different audio streams simultaneously”, and click “ok”. Then reboot your system.

ASRock A785GM Motherboard

ACT/LINK LED

SPEED LED

LAN Port

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1.1.

IntroductionIntroduction

Introduction

1.1.

IntroductionIntroduction

Thank you for purchasing ASRock A785GM 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

ASRock A785GM Motherboard

(Micro ATX Form Factor: 9.6-in x 7.2-in, 24.4 cm x 18.3 cm) ASRock A785GM Quick Installation Guide ASRock A785GM Support CD 2 x Serial ATA (SATA) Data Cables (Optional) 1 x I/O Panel Shield

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ASRock A785GM Motherboard

1.21.2

SpecificationsSpecifications

1.2

Specifications

1.21.2

SpecificationsSpecifications

Platform - Micro ATX Form Factor: 9.6-in x 7.2-in, 24.4 cm x 18.3 cm 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 / Athlon II X4 / X3 / X2 / Sempron 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)

- 2 x DDR2 DIMM slots

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

- Max. capacity of system memory: 8GB (see CAUTION 4)

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

- 1 x PCI Express 2.0 x1 slot

- 2 x PCI slots

- Supports Hybrid CrossFireX

Graphics - Integrated AMD Radeon HD 4200 graphics

- D X10.1 class iGPU, Shader Model 4.1

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

- Supports D-Sub with max. resolution up to 2048x1536 @ 60Hz

Audio - 5.1 CH HD Audio (ALC662 Audio Codec) LAN - Realtek PCIEx1 LAN 8103EL / 8102EL

- Speed: 10/100 Ethernet

- Supports Wake-On-LAN

Rear Panel I/O I/O Panel

- 1 x PS/2 Mouse Port

- 1 x PS/2 Keyboard Port

- 1 x Serial Port: COM1

- 1 x VGA Port

- 4 x Ready-to-Use USB 2.0 Ports

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

- HD Audio Jack: Line in / Front Speaker / Microphone

Connector - 4 x Serial ATAII 3.0Gb/s connectors, support RAID (RAID 0,

RAID 1, RAID 10 and JBOD), NCQ, AHCI a nd “Hot Plug” functions (see CAUTION 6)

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

- 1 x Floppy connector

- 1 x Print port header

- CPU/Chassis FAN connector

- 24 pin ATX power connector

- 4 pin 12V power connector

- Front panel audio connector

- 2 x USB 2.0 headers (support 4 USB 2.0 ports) (see CAUTION 7)

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

- CPU, VCCM, NB Voltage Multi-adjustment

Support CD - Drivers, Utilities, AntiVirus Software (Trial Version),

AMD OverDriveTM Utility, ASRock Software Suite (CyberLink DVD Suite - OEM and Trial; Creative Sound Blaster X-Fi MB Trial)

Unique Feature - ASRock OC Tuner (see CAUTION 8)

- Intelligent Energy Saver (see CAUTION 9)

- Instant Boot

- ASRock Instant Flash (see CAUTION 10)

- ASRock OC DNA (see CAUTION 11)

- Hybrid Booster:

- CPU Frequency Stepless Control (see CAUTION 12)

- ASRock U-COP (see CAUTION 13)

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

- ASRock AM2 Boost: ASRock Patented Te chnology to boost

memory performance up to 12.5% (see CAUTION 14) Hardware - CPU Temperature Sensing Monitor - Chassis Temperature Sensing

- CPU Fan Ta chometer

- Chassis Fan Tachometer

- CPU Quiet Fan

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

ASRock A785GM Motherboard

OS - Microsoft® Windows® 7 / 7 64-bit / Vista

/ VistaTM 64-bit /

XP / XP Media Center / XP 64-bit compliant

Certifications - FCC, CE, WHQL

- EuP Ready (EuP ready power supply is required) (see CAUTION 15)

* 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 read “Untied Overclocking Technology” on page 24 for details.

2. This motherboard supports Dual Channel Memory Te chnology. Before you implement Dual Channel Memory Technology, make sure to read the installation guide of memory modules on page 12 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® 7 / VistaTM / XP. For Windows® OS 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.

6. Before installing SAT AII hard disk to SATAII conne ctor, please rea d the “SATAII Hard Disk Setup Guide” on page 26 of “User Manual” in the support CD to adjust your SA TAII hard disk drive to SA TAII mode. You can also connect SA TA hard disk to SATAII connector directly.

7. Power Management for USB 2.0 works fine under Microsoft® Windows® 7 64-bit / 7 / VistaTM 64-bit / VistaTM / XP 64-bit / XP SP1 or SP2.

8. 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

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ASRock A785GM Motherboard

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9. 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

10. 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.

11. 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.

12. 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.

13. 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.

14. 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.

ASRock A785GM Motherboard

15. 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.

ASRock A785GM Motherboard

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2.2.

InstallationInstallation

Installation

2.2.

InstallationInstallation

This is a Micro ATX form factor (9.6-in x 7.2-in, 24.4 cm x 18.3 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 se cure the motherboard to the chassis, please do not over-tighten the screws! Doing so may damage the motherboard.

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ASRock A785GM Motherboard

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

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. 6). For proper installation, please kindly refer to the instruction manuals of the CPU fan and the heatsink.

ASRock A785GM Motherboard

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2.3 Installation of Memory Modules (DIMM)2.3 Installation of Memory Modules (DIMM)

2.3 Installation of Memory Modules (DIMM)

2.3 Installation of Memory Modules (DIMM)2.3 Installation of Memory Modules (DIMM)

A785GM motherboard provides two 240-pin DDR2 (Double Data Rate 2) DIMM slots, and supports Dual Channel Memory Technology. For dual channel configuration, you always need to install two identical (the same brand, speed, size and chip-type) memory modules in the DD R2 DIMM slots to a ctivate Dual Cha nnel Memory Technology . Otherwise, it will operate at single channel mode.

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

2. If you install only one memory module or two non-identical memory modules, it is unable to a ctivate the Dual Cha nnel Memory Technology.

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 brea k

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 A785GM 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; White) is used for PCI Express cards with x1 lane width cards, such as Gigabit LAN card, SATA2 card, etc. PCIE2 (PCIE x16 slot; Blue) is used for PCI Express cards with x16 lane width graphics cards.

Installing an expansion cardInstalling an expansion card

Installing an expansion card

Installing an expansion cardInstalling an expansion card

Step 1. Before installing the expansion card, please make sure that the power

supply is switched off or the power cord is unplugged. Please read the documentation of the expansion card and make necessary hardware settings for the card before you start the installation.

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

for later use.

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

completely seated on the slot.

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

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