Asrock 939A785GMH 128M V1.0 User Manual

939A785GMH/128M

User Manual

Version 1.0

Published September 2009

No part of this manual 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 manual may or may not be regis-

tered 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 manual are furnished for informa-

tional 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 manual.

With respect to the contents of this manual, ASRock does not provide warranty of

any kind, either expressed or implied, including but not limited to the implied warran-

ties 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 manual 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

ContentsContents

Contents

ContentsContents

1.1.

IntroductionIntroduction

Introduction

1.1.

IntroductionIntroduction

1.1 Package Contents ..................................................................... 5

1.2 Specifications ............................................................................ 6

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

HD-DVD Playback Support ........................................................ 11

1.4 Motherboard Layout ................................................................. 12

1.5 I/O Panel .................................................................................... 13

2.2.

InstallationInstallation

Installation

2.2.

InstallationInstallation

Pre-installation Precautions ............................................................... 14

2.1 CPU Installation ......................................................................... 15

2.2 Installation of CPU Fan and Heatsink ....................................... 15

2.3 Installation of Memory Modules (DIMM) .................................... 16

2.4 Expansion Slots (PCI and PCI Express Slots) .......................... 18

2.5 Multi Monitor and Surround Display Features .......................... 19

2.6 ATITM Hybrid CrossFireXTM Operation Guide............................. 22

2.7 Jumpers Setup .......................................................................... 24

2.8 Onboard Headers and Connectors.......................................... 25

2.9 SATAII Hard Disk Setup Guide .................................................. 29

2.10 Serial ATA (SATA) / Serial ATAII (SATAII) Hard Disks

Installation ................................................................................. 30

2.11 Hot Plug and Hot Swap Functions for SATA / SATAII HDDs .... 30

2.12 SATA / SATAII HDD Hot Plug Feature and Operation Guide ..... 31

2.13 Driver Installation Guide ............................................................ 33

2.14 Installing Windows® XP / XP 64-bit / VistaTM / Vista

With RAID Functions ................................................................. 33

2.14.1 Installing Windows® XP / XP 64-bit With RAID

2.14.2 Installing Windows® VistaTM / Vista

2.15 Installing Windows® XP / XP 64-bit / VistaTM / Vista

Without RAID Functions ............................................................ 35

2.15.1 Installing Windows® XP / XP 64-bit Without RAID

2.15.2 Installing Windows® VistaTM / Vista

2.16 Untied Overclocking Technology .............................................. 37

......................................................................................................................

...........................................................

......................................................................................................................

............................................................................................................................

..............................................................

............................................................................................................................

64-bit

Functions .................................................................... 33

Functions ...................................................................... 34

Functions ...................................................................... 35

Functions ...................................................................... 36

64-bit With RAID

64-bit

64-bit Without RAID

5 5

14 14

3.3.

BIOS SBIOS S

BIOS S

3.3.

BIOS SBIOS S

3.1 Introduction ............................................................................... 38

3.2 Main Screen .............................................................................. 39

3.3 OC Tweaker Screen ................................................................. 40

3.4 Advanced Screen .................................................................... 44

3.5 Hardware Health Event Monitoring Screen ............................. 55

3.6 Boot Screen .............................................................................. 56

3.7 Security Screen ........................................................................ 57

3.8 Exit Screen ............................................................................... 58

4.4.

Software SupportSoftware Support

Software Support

4.4.

Software SupportSoftware Support

4.1 Install Operating System ........................................................... 59

4.2 Support CD Information ............................................................. 59

ETUP UTILITYETUP UTILITY

ETUP UTILITY

ETUP UTILITYETUP UTILITY

3.1.1 BIOS Menu Bar ............................................................... 38

3.1.2 Navigation Keys ............................................................. 39

3.4.1 CPU Configuration .......................................................... 45

3.4.2 Chipset Configuration ..................................................... 46

3.4.3 ACPI Configuration ......................................................... 47

3.4.4 Storage Configuration .................................................... 49

3.4.5 PCIPnP Configuration ...................................................... 51

3.4.6 Floppy Configuration ...................................................... 52

3.4.7 Super IO Configuration ................................................... 52

3.4.8 USB Configuration .......................................................... 54

3.6.1 Boot Settings Configuration ........................................... 56

4.2.1 Running Support CD ....................................................... 59

4.2.2 Drivers Menu .................................................................. 59

4.2.3 Utilities Menu ................................................................... 59

4.2.4 Contact Information ........................................................ 59

......................................................................................................

...................................................

......................................................................................................

...................................................

......................................................................................................

38 38

59 59

1.1.

IntroductionIntroduction

Introduction

1.1.

IntroductionIntroduction

Thank you for purchasing ASRock 939A785GMH/128M motherboard, a reliable

motherboard produced under ASRock’s consistently stringent quality control. It de-

livers excellent performance with robust design conforming to ASRock’s commit-

ment to quality and endurance.

In this manual, chapter 1 and 2 contain introduction of the motherboard and 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

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

ackack

1.1

1.11.1

1 x ASRock 939A785GMH/128M Motherboard

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

1 x ASRock 939A785GMH/128M Quick Installation Guide 2 x ASRock 939A785GMH/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

age Contentsage Contents

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age Contentsage Contents

http://www.asrock.com

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 - Socket 939 for AMD Athlon

- Supports AMD’s Cool ‘n’ QuietTM Technology

- FSB 1000 MHz (2.0 GT/s)

- Supports Untied Overclocking Technology (see CAUTION 1)

- Supports Hyper-Transport Technology

Chipset - Northbridge: AMD 785G

- Southbridge: AMD SB710

Memory - Dual Channel DDR Memory Technology (see CAUTION 2)

- 4 x DDR DIMM slots

- Support DDR 400/333/266 non-ECC, un-buffered memory

- Max. capacity of system memory: 4GB (see CAUTION 3)

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 4)

- Integrated 128MB side port memory for iGPU

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

- Supports HDMI Technology with max. resolution up to

1920x1200 (1080P)

- Supports Dual-link DVI with max. resolution up to 2560x1600

@ 75Hz

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

@ 60Hz

- Supports HDCP function

- Supports Full HD 1080p Blu-ray (BD) / HD-DVD playback (see CAUTION 5)

Audio - 7.1 CH Windows

(ALC888 Audio Codec)

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

- Realtek RTL8111DL

- Supports Wake-On-LAN

VistaTM Premium Level HD Audio

64FX / 64X2 / 64 processors

Rear Panel I/O I/O Panel

- 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 eSATAII Port

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

- HD Audio Jack: Rear Speaker/Central/Bass/Line in/ Front Speaker/Microphone (see CAUTION 6)

Connector - 5 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 7)

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

- 1 x Floppy connector

- 1 x IR header

- 1 x COM port header

- 1 x Print 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 8)

BIOS Feature - 8Mb AMI BIOS

- AMI Legal BIOS

- Supports “Plug and Play”

- ACPI 1.1 Compliance Wake Up Events

- Supports jumperfree

- SMBIOS 2.3.1 Support

- VCCM, NB Voltage Multi-adjustment

- Supports Smart BIOS

Support CD - Drivers, Utilities, AntiVirus Software (Trial Version) Unique Feature - ASRock OC Tuner (see CAUTION 9)

- Intelligent Energy Saver (see CAUTION 10)

- Instant Boot

- ASRock Instant Flash (see CAUTION 11)

- ASRock OC DNA (see CAUTION 12)

- Hybrid Booster:

- CPU Frequency Stepless Control (see CAUTION 13)

- ASRock U-COP (see CAUTION 14)

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

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

Vista

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

/ VistaTM 64-bit / Win7 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 third-

party 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 “Un-

tied Overclocking Technology” on page 37 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 16 for proper installation.

3. 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

bit with 64-bit CPU, there is no such limitation.

4. The maximum shared memory size is defined by the chipset vendor and

is subject to change. Please check AMD website for the latest information.

5. 1080p Blu-ray (BD) / HD-DVD playback support on this motherboard requires

the proper hardware configuration. Please refer to page 11 for the minimum

hardware requirement and the passed 1080p Blu-ray (BD) / HD-DVD films in

our lab test.

6. 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 modes. Please check the table on page 13 for proper connection.

7. Before installing SATAII hard disk to SATAII connector, please read the “SATAII

Hard Disk Setup Guide” on page 29 to adjust your SATAII hard disk drive to

SATAII mode. You can also connect SATA hard disk to SATAII connector

directly.

VistaTM. For Windows® XP 64-bit and Windows® VistaTM 64-

8. Power Management for USB 2.0 works fine under Microsoft® Windows

VistaTM 64-bit / VistaTM / XP 64-bit / XP SP1 or SP2.

9. 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

10. 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

11. 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 prepar-

ing 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.

12. The software name itself – OC DNA literally tells you what it is capable of.

OC DNA, an exclusive utility developed by ASRock, provides a conve-

nient 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.

13. 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.

14. 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 and the heatsink when you install the PC system.

15. EuP, stands for Energy Using Product, was 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 and 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 manu-

facturer for more details.

1010

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 playback support on this motherboard

requires the proper hardware configuration. Please refer to below table

for the minimum hardware requirement.

CPU AMD Athlon 64X2 3800+

VGA Onboard VGA with DVI-D port

Memory Dual Channel DDR 333, 1GB x 2

Suggested OS Windows

* 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

-D-D

VD Playback SupporVD Playback Suppor

-D

VD Playback Suppor

-D-D

VD Playback SupporVD Playback Suppor

VistaTM or Windows® VistaTM 64

http://www.asrock.com

1111

1.4 Motherboard Layout1.4 Motherboard Layout

1.4 Motherboard Layout

1.4 Motherboard Layout1.4 Motherboard Layout

Keyboard

PS2

VGA1

USB2.0 T: US B2 B:USB3

DVI_CON1

PS2_USB_PW1

ATX12V1

HDMI1

RoHS

eSATAII_1

USB2.0

Top:

T: US B0

RJ-45

B:USB1

Top:

SIDE SPK

Bottom:

SPDIF_01

Center:

REAR SPK

Gigabit LAN

Bottom:

MIC IN

Top:

LINE IN

Center:

FRONT

34 33

LAN

PCIE1

Super

I/O

IR1

HD_AUDIO1

AUDIO CODEC

COM1

CD1

PCI1

PCI2

FLOPPY1

21.8cm (8.6-in)

CPU_FAN1

Hybrid CrossFire

SOCKET 939

939A785GMH/128M

AMD

785G

Chipset

PCIE2

PCI Express2.0 EuP Ready

CMOS

BATTERY

8Mb

BIOS

LPT1

2526

Sideport memory 128MB

CLRCMOS1

PANEL1

PLEDPWRBTN

HDLED RESET

FSB800

Dual Channel

DDR400

DDR2 (64bit, 184-pin module)

DDR1 (64bit, 184-pin module)

AMD

SB710

Chipset

SPEAKER1

SATAII_1(SATAII_2 PORT0) (PORT1)

FSB800

DDR3 (64bit, 184-pin module)

USB6_7

USB8_9

SATAII_3(SATAII_4 PORT2) (PORT3)

DDR4 (64bit, 184-pin module)

USB4_5

PWR_FAN1

SATAII_5 (PORT4)

ATXPWR1

IDE1

CHA_FAN1

24.4cm (9.6-in)

10 11

14 15

1 PS2_USB_PW1 Jumper 19 Third SAT AII Connector (SA TAII_3 (PORT 2)) 2 A TX 12V Power Connector (A TX12V1) 20 Secondary SAT AII Connector 3 CPU Heatsink Retention Module (SATAII_2 (PORT 1)) 4 939-Pin CPU Socket 21 Primary SAT AII Connector 5 CPU Fan Connector (CPU_FAN1) (SATAII_1 (PORT 0)) 6 2 x 184-pin DDR DIMM Slots 22 Chassis Speaker Header

(Dual Channel A: DDR1, DDR2; Blue) (SPEAKER 1, Purple)

7 2 x 184-pin DDR DIMM Slots 23 System Panel He ader (P ANEL1, Ora nge)

(Dual Channel B: DDR3, DDR4; Black) 24 SPI Flash Memory (8Mb) 8 ATX Power Connector (A TXPWR1) 25 Print Port Header (LPT1, Purple) 9 Primary IDE Connector (IDE1, Blue) 26 Floppy Connector (FLOPPY1) 10 USB 2.0 Header (USB8_9, Blue) 27 Serial Port Connector (COM1) 11 USB 2.0 Header (USB6_7, Blue) 28 Internal Audio Connector: CD1 (Black) 12 USB 2.0 Header (USB4_5, Blue) 29 Front Panel Audio Header 13 Power Fan Connector (PWR_FAN1) (HD_AUDIO1, Lime) 14 Clear CMOS Jumper (CLRCMOS1) 30 Infrared Module Header (IR1) 15 Southbridge Controller 31 Northbridge Controller 16 Chassis Fan Connector (CHA_FAN1) 32 PCI Express 2.0 x16 Slot (PCIE2; Green) 17 Fifth SAT AII Connector (SA T AII_5 (PORT 4)) 33 PCI Express 2.0 x1 Slot (PCIE1; Green) 18 Fourth SAT AII Connector (SA TAII_4 (PORT 3)) 34 Northbridge Controller

1212

1.51.5

1.5

1.51.5

I/O PanelI/O Panel

I/O Panel

I/O PanelI/O Panel

1 USB 2.0 Ports (USB23) 8 Microphone (Pink) 2 VGA/D-Sub Port 9 Optical SPDIF Out Port

* 3 LAN RJ-45 Port 10 USB 2.0 Ports (USB01)

4 Central / Bass (Orange) 11 eSATAII Port 5 Rear Speaker (Black) *** 12 HDMI Port 6 Line In (Light Blue) 13 VGA/DVI-D Port

** 7 Front Speaker (Lime) 14 PS/2 Keyboard Port (Purple)

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

indications.

Activity/Link LED SPEED LED

Status Description Status Description

LAN Port LED Indications

ACT/LINK LED

SPEED LED

Off No Link Off 10Mbps connection

Blinking Data Activity Orange 100Mbps connection

On Link Green 1Gbps connection

LAN Port

** 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 for Audio Output Connection

Audio Output Channels Front Speaker Rear Speaker Central / Bass Line In

(No. 7) (No. 5) (No. 4) (No. 6)

2 V -- -- --

4VV----

6VVV--

8VVVV

*** To support AC3 audio format with HDMI Audio under VistaTM, please install the HDMI audio

driver in XP support CD AAX785-11. 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.

1313

2.2.

InstallationInstallation

Installation

2.2.

InstallationInstallation

939A785GMH/128M is a Micro ATX form factor (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 anti-

static 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.

1414

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

Socket 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 fas-

tened and in good contact with each other. Then connect the CPU fan to

the CPU FAN connector (CPU_FAN1, see Page 12, No. 5). For proper

installation, please kindly refer to the instruction manuals of the CPU fan

and the heatsink.

1515

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)

939A785GMH/128M motherboard provides four 184-pin DDR (Double Data

Rate) 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) DDR DIMM pair in the slots of the same color. In other words, you have to install identical DDR DIMM pair in Dual Channel A (DDR1 and DDR2; Blue slots; see p.12 No.6) or identical DDR DIMM pair in Dual Chan- nel B (DDR3 and DDR4; Black slots; see p.12 No.7), so that Dual Channel Memory

Technology can be activated. This motherboard also allows you to install four DDR DIMMs for dual channel configuration, and please install identical DDR

DIMMs in all four slots. You may refer to the Dual Channel Memory Configuration

Table below.

Dual Channel Memory Configurations

DDR1 DDR2 DDR3 DDR4

(Blue Slot) (Blue Slot) (Black Slot) (Black Slot)

(1) Populated Populated - -

(2) - - Populated Populated

(3)* Populated Populated Populated Populated

* For the configuration (3), please install identical DDR DIMMs in all four 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 blue slots

(DDR1 and DDR2), or in the set of black slots (DDR3 and DDR4).

2. If only one memory module or three memory modules are installed

in the DDR 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 DDR1

and DDR3, it is unable to activate the Dual Channel Memory Tech-

nology .

1616

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.

notch break

notch

break

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.

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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 Express cards with x1 lane

width cards, such as Gigabit LAN card, SATA2 card, etc.

PCIE2 (PCIE x16 slot; Green) 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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+ 41 hidden pages

Asrock 939A785GMH 128M V1.0 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual