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Copyright Notice:
Copyright Notice:
Copyright Notice:
Copyright Notice:
Copyright Notice:
No part of this installation guide may be reproduced, transcribed, transmitted, or trans-
lated in any language, in any form or by any means, except duplication of documen-
tation 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 identifica-
tion 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
Copyright©2010 ASRock INC. All rights reserved.
ASRock
Published January 2010
A785GM
Motherboard
1 1 1 1 1

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Summary of Contents for ASROCK A785GM

  • Page 1 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.
  • Page 2: Motherboard Layout

    Southbridge Controller SPI Flash Memory (8Mb) Third SATAII Connector (SATAII_3 (PORT 2)) PCI Express 2.0 x16 Slot (PCIE2; Blue) Fourth SATAII Connector (SATAII_4 (PORT 3)) PCI Express 2.0 x1 Slot (PCIE1; White) 2 2 2 2 2 ASRock A785GM Motherboard...
  • Page 3 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. 3 3 3 3 3 ASRock A785GM Motherboard...
  • Page 4: Package Contents

    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.
  • Page 5: Specifications

    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 5 5 5 5 5 ASRock A785GM Motherboard...
  • Page 6 - CPU Frequency Stepless Control (see CAUTION 12) - ASRock U-COP (see CAUTION 13) - Boot Failure Guard (B.F.G.) - ASRock AM2 Boost: ASRock Patented Technology to boost memory performance up to 12.5% (see CAUTION 14) Hardware - CPU Temperature Sensing...
  • Page 7 64-bit / 7 / Vista 64-bit / Vista / XP 64-bit / XP SP1 or SP2. 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.
  • Page 8 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 ®...
  • Page 9 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 manu- facturer for more details. 9 9 9 9 9 ASRock A785GM Motherboard...
  • Page 10: Pre-Installation Precautions

    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. ASRock A785GM Motherboard...
  • Page 11: Installation Of Cpu Fan And Heatsink

    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...
  • Page 12: 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 DDR2 DIMM slots to activate Dual Channel Memory Technology.
  • Page 13: Expansion Slots (Pci And Pci Express Slots)

    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. ASRock A785GM Motherboard...
  • Page 14: Multi Monitor Feature

    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”. ASRock A785GM Motherboard...
  • Page 15 6. Use multi monitor feature. 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. ASRock A785GM Motherboard...
  • Page 16 Install the onboard VGA driver from our support CD to your system for both the onboard VGA and the discrete graphics card. Step 6. Restart your computer. Then you will find “ATI Catalyst Control Center” on ® your Windows taskbar. ATI Catalyst Control Center ASRock A785GM Motherboard...
  • Page 17 Technologies Inc., and is used only for identification or explanation and to the owners’ benefit, without intent to infringe. * For further information of ATI Hybrid CrossFireX technology, please check AMD website for up dates and details. ASRock A785GM Motherboard...
  • Page 18: Jumpers Setup

    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 clear- CMOS action. ASRock A785GM Motherboard...
  • Page 19: Onboard Headers And Connectors

    (PORT 0) (PORT 1) see p.2, No. 14) Serial ATA (SATA) Either end of the SATA data cable Data Cable can be connected to the SATA / SATAII hard disk or the SATAII (Optional) connector on this motherboard. ASRock A785GM Motherboard...
  • Page 20 [Auto] to [Enabled]. F. Enter Windows system. Click the icon on the lower right hand taskbar to enter Realtek HD Audio Manager. For Windows ® XP / XP 64-bit OS: Click “Audio I/O”, select “Connector Settings” , choose ASRock A785GM Motherboard...
  • Page 21 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 A785GM Motherboard...
  • Page 22: 64-Bit / Vista

    XP / XP 64-bit Without RAID XP / XP 64-bit Without RAID Functions Functions Functions Functions Functions ® If you want to install Windows XP / XP 64-bit on your SATA / SATAII HDDs without RAID functions, please follow below steps. ASRock A785GM Motherboard...
  • Page 23 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, and click the “Load Driver” button on the left on the bottom to load the AMD AHCI drivers.
  • Page 24: Bios Information

    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 double-click on the file “ASSETUP.EXE” from the “BIN” folder in the Support CD to display the menus. ASRock A785GM Motherboard...
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  • Page 35 SATAII_3 SATAII_4 (PORT 2) (PORT 3) SATAII_1 SATAII_2 (PORT 0) (PORT 1) ASRock A785GM Motherboard...
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