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ASRock 939A785GMH Motherboard
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.
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.
Published August 2011
Copyright©2011 ASRock INC. All rights reserved.
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

ASRock 939A785GMH Motherboard
1 PS2_USB_PW1 Jumper 20 Secondary SATAII Connector
2 ATX 12V Power Connector (ATX12V1) (SATAII_2 (PORT 1))
3 CPU Heatsink Retention Module 21 Primary SATAII Connector
4 939-Pin CPU Socket (SATAII_1 (PORT 0))
5 CPU Fan Connector (CPU_FAN1) 22 Chassis Speaker Header
6 2 x 184-pin DDR DIMM Slots (SPEAKER 1, White)
(Dual Channel A: DDR1, DDR2; Blue) 23 System Panel Header (PANEL1, White)
7 2 x 184-pin DDR DIMM Slots 24 SPI Flash Memory (8Mb)
(Dual Channel B: DDR3, DDR4; Black) 25 Print Port Header (LPT1, White)
8 ATX Power Connector (ATXPWR1) 26 Floppy Connector (FLOPPY1)
9 Primary IDE Connector (IDE1, Blue) 27 Serial Port Connector (COM1)
10 USB 2.0 Header (USB8_9, Blue) 28 Internal Audio Connector: CD1 (Black)
11 USB 2.0 Header (USB6_7, Blue) 29 Front Panel Audio Header
12 USB 2.0 Header (USB4_5, Blue) (HD_AUDIO1, White)
13 Power Fan Connector (PWR_FAN1) 30 Infrared Module Header (IR1)
14 Clear CMOS Jumper (CLRCMOS1) 31 Northbridge Controller
15 Southbridge Controller 32 PCI Express 2.0 x16 Slot (PCIE2; Blue)
16 Chassis Fan Connector (CHA_FAN1) 33 PCI Express 2.0 p2-x1 Slot (PCIE1; White)
17 Fifth SATAII Connector (SATAII_5 (PORT 4)) 34 Northbridge Controller
18 Fourth SATAII Connector (SATAII_4 (PORT 3))
19 Third SATAII Connector (SATAII_3 (PORT 2))

ASRock 939A785GMH Motherboard
** 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 -- -- --
4 V V -- --
6 V V V --
8 V V V V
1 USB 2.0 Ports (USB23) 8 Microphone (Pink)
2 D-Sub Port 9 Optical SPDIF Out Port
* 3 LAN RJ-45 Port 10 USB 2.0 Ports (USB01)
4 Central / Bass (Orange) 11 eSATA2 Port
5 Rear Speaker (Black) *** 12 HDMI Port
6 Line In (Light Blue) 13 DVI-D Port
** 7 Front Speaker (Lime) 14 PS/2 Keyboard Port (Purple)
*** To support AC3 audio format with HDMI Audio under Vista
TM, please install the XP HDMI
audio driver.
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.
LAN Port
ACT/LINK
LED
SPEED
LED
* There are two LED next to the LAN port. Please refer to the table below for the LAN port LED
indications.
LAN Port LED Indications
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
Produktspecifikationer
Varumärke: | Asrock |
Kategori: | moderkort |
Modell: | 939A785GMH |
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