ASROCK FM2A75M-DGS User manual

1
ASRock FM2A75M-DGS Motherboard
English
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 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 identifica-
tion or explanation and to the owners’ benefit, without intent to infringe.
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 commit-
ment 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 condi-
tions 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 pos-
sibility 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 2012
Copyright©2012 ASRock INC. All rights reserved.

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ASRock FM2A75M-DGS Motherboard
English
Motherboard Layout
1 ATX 12V Power Connector (ATX12V1) 16 Chassis Fan Connector (CHA_FAN1)
2 CPU Heatsink Retention Module 17 System Panel Header (PANEL1)
3 CPU Socket 18 Print Port Header (LPT1)
4 CPU Fan Connector (CPU_FAN1) 19 USB 3.0 Header (USB3_2_3)
5 2 x 240-pin DDR3 DIMM Slots 20 USB 2.0 Header (USB4_5)
(Dual Channel: DDR3_A1, DDR3_B1) 21 USB 2.0 Header (USB8_9)
6 ATX Power Connector (ATXPWR1) 22 USB 2.0 Header (USB6_7)
7 SATA3 Connector (SATA_1) 23 Consumer Infrared Module Header (CIR1)
8 SATA3 Connector (SATA_2) 24 COM Port Header (COM1)
9 SATA3 Connector (SATA_3) 25 Front Panel Audio Header (HD_AUDIO1)
10 SATA3 Connector (SATA_4) 26 PCI Slot (PCI1)
11 SATA3 Connector (SATA_6) 27 Infrared Module Header (IR1)
12 SATA3 Connector (SATA_5) 28 PCI Express 2.0 x1 Slot (PCIE2)
13 Southbridge Controller 29 PCI Express 2.0 x16 Slot (PCIE1)
14 Chassis Speaker Header (SPEAKER1) 30 Clear CMOS Jumper (CLRCMOS1)
15 SPI Flash Memory (64Mb) 31 Power Fan Connector (PWR_FAN1)
Super
I/O
CMOS
BATTERY
ATXPWR1
COM1
LAN
AUDIO
CODEC
1
CLRCMOS1
1
CPU_FAN1
CHA_FAN1
22.6cm (8.9-in)
19.3cm (7.6-in)
64Mb
BIOS
IR1
1
PCIE1
FSB800
DDR3_A1 (64 bit, 240-pin module)
DDR3_B1 (64 bit, 240-pin module)
Top:
LINE IN
Center:
FRONT
Bottom:
MIC IN
RJ-45 LAN
11
USB6_7 USB8_9
USB 2.0
T: USB2
B: USB3
CIR1
1
1
LPT1
PS2
Mouse
PS2
Keyboard
VGA1
USB 2.0
T: US B 0
B: USB1
PWR_FAN1
ATX12V1
DVI1
SOCKET FM2
AMD
A75 FCH
(Hudson-D3)
Chipset
FM2A75M-DGS
USB 3.0
T: US B 0
B: USB1
SATA_3 SATA_1
SATA_4 SATA_2
SATA_5
SATA_6
SPEAKER1
1
HDLED RESET
PLED PWRBTN
1
PANEL1
USB3_2_3
1
USB4_5
HD_AUDIO1
1
PCIE2
PCI1
X
Fast LAN
X
Fast USB
X Fast RAM
Dual Graphics
RoHS
DX11
ErP/EuP Ready
DDR3 2400+
6
7
124
35
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
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ASRock FM2A75M-DGS Motherboard
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I/O Panel
* 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
1 PS/2 Mouse Port (Green) 7 USB 3.0 Ports (USB3_01)
* 2 LAN RJ-45 Port *** 8 USB 2.0 Ports (USB01)
3 Line In (Light Blue) 9 DVI-D Port (DVI1)
** 4 Front Speaker (Lime) 10 D-Sub Port (VGA1)
5 Microphone (Pink) 11 PS/2 Keyboard Port (Purple)
*** 6 USB 2.0 Ports (USB23)
LAN Port
ACT/LINK
LED
SPEED
LED
6
8
11
12
4
3
5
7
9
10
** 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.
*** It is recommended to install the USB Keyboard/Mouse cable to USB 2.0 ports (USB01 or
USB23) instead of USB 3.0 ports.

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ASRock FM2A75M-DGS Motherboard
1. Introduction
Thank you for purchasing ASRock FM2A75M-DGS motherboard, a reliable moth-
erboard produced under ASRock’s consistently stringent quality control. It delivers
excellent performance with robust design conforming to ASRock’s commitment to
quality and endurance.
This Quick Installation Guide contains introduction of the motherboard and step-by-
step installation guide. More detailed information of the motherboard can be found
in the user manual presented in 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 no-
tice. 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
1.1 Package Contents
ASRock FM2A75M-DGS Motherboard
(Micro ATX Form Factor: 8.9-in x 7.6-in, 22.6 cm x 19.3 cm)
ASRock FM2A75M-DGS Quick Installation Guide
ASRock FM2A75M-DGS Support CD
2 x Serial ATA (SATA) Data Cables (Optional)
1 x I/O Panel Shield
ASRock Reminds You...
To get better performance in Windows® 7 / 7 64-bit / VistaTM / VistaTM 64-
bit, it is recommended to set the BIOS option in Storage Configuration to
AHCI mode. For the BIOS setup, please refer to the “User Manual” in our
support CD for details.
English

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ASRock FM2A75M-DGS Motherboard
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1.2 Specifications
Platform - Micro ATX Form Factor: 8.9-in x 7.6-in, 22.6 cm x 19.3 cm
- Solid Capacitor for CPU power
CPU - Support for Socket FM2 100W processors
- Supports AMD’s Cool ‘n’ QuietTM Technology
- UMI-Link GEN2
Chipset - AMD A75 FCH (Hudson-D3)
Memory - Dual Channel DDR3 Memory Technology
- 2 x DDR3 DIMM slots
- Support DDR3 2400+(OC)/2133(OC)/1866/1600/1333/1066/
800 non-ECC, un-buffered memory (see CAUTION 1)
- Max. capacity of system memory: 16GB (see CAUTION 2)
- Supports Intel®Extreme Memory Profile (XMP) 1.3 / 1.2
- Supports AMD Memory Profile (AMP)
Expansion Slot - 1 x PCI Express 2.0 x16 slot (PCIE1 @ x16 mode)
- 1 x PCI Express 2.0 x1 slot
- 1 x PCI slot
- Supports AMD Dual Graphics
Graphics - AMD Radeon HD 7000 graphics
- DirectX 11, Pixel Shader 5.0
- Max. shared memory 512MB
- Dual VGA Output: support DVI and D-Sub ports by
independent display controllers
- Supports Dual-link DVI with max. resolution up to
2560x1600 @ 75Hz
- Supports D-Sub with max. resolution up to 1920x1600 @
60Hz
- Supports AMD Steady VideoTM: New video post processing
capability for automatic jutter reduction on home/online
video
- Supports HDCP function with DVI port
- Supports Full HD 1080p Blu-ray (BD) / HD-DVD playback
with DVI port
Audio - 5.1 CH HD Audio (Realtek ALC662 Audio Codec)
LAN - PCIE x1 Gigabit LAN 10/100/1000 Mb/s
- Realtek RTL8111E
- Supports Wake-On-LAN
- Supports LAN Cable Detection
- Supports Energy Efficient Ethernet 802.3az
- Supports PXE

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ASRock FM2A75M-DGS Motherboard
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Rear Panel I/O I/O Panel
- 1 x PS/2 Mouse/Keyboard Port
- 1 x D-Sub Port
- 1 x DVI-D Port
- 4 x Ready-to-Use USB 2.0 Ports
- 2 x Ready-to-Use USB 3.0 Ports
- 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED
LED)
- HD Audio Jack: Line in / Front Speaker / Microphone
SATA3 - 6 x SATA3 6.0 Gb/s connectors, support RAID (RAID 0,
RAID 1 and RAID 10), NCQ, AHCI and “Hot Plug” functions
USB 3.0 - 2 x Rear USB 3.0 ports, support USB 1.1/2.0/3.0 up to
5Gb/s
- 1 x Front USB 3.0 header (supports 2 USB 3.0 ports),
supports USB 1.1/2.0/3.0 up to 5Gb/s
Connector - 6 x SATA3 6.0Gb/s connectors
- 1 x IR header
- 1 x CIR header
- 1 x Print port header
- 1 x COM port header
- 1 x CPU Fan connector (4-pin)
- 1 x Chassis Fan connector (4-pin)
- 1 x Power Fan connector (3-pin)
- 24 pin ATX power connector
- 4 pin 12V power connector
- Front panel audio connector
- 3 x USB 2.0 headers (support 6 USB 2.0 ports)
- 1 x USB 3.0 header (supports 2 USB 3.0 ports)
BIOS Feature - 64Mb AMI UEFI Legal BIOS with GUI support
- Supports “Plug and Play”
- ACPI 1.1 Compliance Wake Up Events
- Supports jumperfree
- SMBIOS 2.3.1 Support
- DRAM, VDDP, VDDR, SB Voltage Multi-adjustment
Support CD - Drivers, Utilities, AntiVirus Software (Trial Version), AMD
Live! Explorer, AMD Fusion, CyberLink MediaEspresso 6.5
Trial, ASRock MAGIX Multimedia Suite - OEM
Hardware - CPU Temperature Sensing
Monitor - Chassis Temperature Sensing
- CPU/Chassis/Power Fan Tachometer
- CPU/Chassis Quiet Fan

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ASRock FM2A75M-DGS Motherboard
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- CPU/Chassis Fan Multi-Speed Control
- Voltage Monitoring: +12V, +5V, +3.3V, Vcore
OS - Microsoft® Windows® 7 / 7 64-bit / VistaTM / VistaTM 64-bit / XP
SP3 compliant
Certifications - FCC, CE, WHQL
- ErP/EuP Ready (ErP/EuP ready power supply is required)
* 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 third-party overclocking tools. Overclocking may
affect your system’s 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. Whether 2400/2133/1866/1600MHz memory speed is support-
ed depends on the CPU you adopt. If you want to adopt DDR3
2400/2133/1866/1600 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
2. Due to the operating system limitation, the actual memory size
may be less than 4GB for the reservation for system usage un-
der Windows®7 / VistaTM / XP. For Windows®64-bit OS with 64-
bit CPU, there is no such limitation. You can use ASRock XFast
RAM to utilize the memory that Windows®cannot use.

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ASRock FM2A75M-DGS Motherboard
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1.3 Unique Features
ASRock Extreme Tuning Utility (AXTU)
ASRock Extreme Tuning Utility (AXTU) is an all-in-one tool to
ne-tune different system functions in a user-friendly interface,
which includes Hardware Monitor, Fan Control, Overclocking,
OC DNA, IES and XFast RAM. In Hardware Monitor, it shows
the major readings of your system. In Fan Control, it shows the
fan speed and temperature for you to adjust. In Overclocking,
you are allowed to overclock CPU frequency for optimal system
performance. In OC DNA, you can save your OC settings as
a profile and share it with your friends. Your friends then can
load the OC profile to their own system to get the same OC set-
tings. In IES (Intelligent Energy Saver), the voltage regulator
can reduce the number of output phases to improve efficiency
when the CPU cores are idle without sacrificing computing per-
formance. In XFast RAM, it fully utilizes the memory space that
cannot be used under Windows®OS 32-bit CPU.
ASRock Instant Boot
ASRock Instant Boot allows you to turn on your PC in just a few
seconds, provides a much more efficient way to save energy,
time, money, and improves system running speed for your sys-
tem. It leverages the S3 and S4 ACPI features which normally
enable the Sleep/Standby and Hibernation modes in Windows®
to shorten boot up time. By calling S3 and S4 at specific timing
during the shutdown and startup process, Instant Boot allows
you to enter your Windows®desktop in a few seconds.
ASRock Instant Flash
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 the <F6> key
during the POST or the <F2> key to enter into the 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 compli-
cated flash utility. Please be noted that the USB flash drive or
hard drive must use FAT32/16/12 file system.

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ASRock FM2A75M-DGS Motherboard
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ASRock APP Charger
If you desire a faster, less restricted way of charging your
Apple devices, such as iPhone/iPad/iPod Touch, ASRock has
prepared a wonderful solution for you - ASRock APP Charger.
Simply install the APP Charger driver, it makes your iPhone
charge much quickly from your computer and up to 40% faster
than before. ASRock APP Charger allows you to quickly charge
many Apple devices simultaneously and even supports continu-
ous charging when your PC enters into Standby mode (S1),
Suspend to RAM (S3), hibernation mode (S4) or power off (S5).
With APP Charger driver installed, you can easily enjoy the mar-
velous charging experience.
ASRock XFast USB
ASRock XFast USB can boost USB storage device perfor-
mance. The performance may depend on the properties of the
device.
ASRock XFast LAN
ASRock XFast LAN provides a faster internet access, which
includes the benefits listed below. LAN Application Prioritiza-
tion: You can configure your application’s priority ideally and/or
add new programs. Lower Latency in Game: After setting online
game’s priority higher, it can lower the latency in games. Traffic
Shaping: You can watch Youtube HD videos and download si-
multaneously. Real-Time Analysis of Your Data: With the status
window, you can easily recognize which data streams you are
transferring currently.
ASRock XFast RAM
ASRock XFast RAM is a new function that is included into AS-
Rock Extreme Tuning Utility (AXTU). It fully utilizes the memory
space that cannot be used under Windows®OS 32-bit CPU.
ASRock XFast RAM shortens the loading time of previously
visited websites, making web surfing faster than ever. And it
also boosts the speed of Adobe Photoshop 5 times faster. An-
other advantage of ASRock XFast RAM is that it reduces the
frequency of accessing your SSDs or HDDs in order to extend
their lifespan.

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ASRock FM2A75M-DGS Motherboard
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ASRock Crashless BIOS
ASRock Crashless BIOS allows users to update their BIOS
without fear of failing. If power loss occurs during the BIOS up-
date process, ASRock Crashless BIOS will automatically finish
the BIOS update procedure after regaining power. Please note
that BIOS files need to be placed in the root directory of your
USB disk. Only USB2.0 ports support this feature.
ASRock OMG (Online Management Guard)
Administrators are able to establish an internet curfew or restrict
internet access at specified times via OMG. You may schedule
the starting and ending hours of internet access granted to other
users. In order to prevent users from bypassing OMG, guest
accounts without permission to modify the system time are re-
quired.
ASRock Internet Flash
ASRock Internet Flash searches for available UEFI firmware
updates from our servers. In other words, the system can auto-
detect the latest UEFI from our servers and flash them without
entering Windows®OS. Please note that you must be running
on a DHCP configured computer in order to enable this function.
ASRock UEFI System Browser
ASRock UEFI system browser is a useful tool included in
graphical UEFI. It can detect the devices and configurations
that users are currently using in their PC. With the UEFI system
browser, you can easily examine the current system configura-
tion in UEFI setup.
ASRock Dehumidifier Function
Users may prevent motherboard damages due to dampness by
enabling “Dehumidifier Function”. When enabling Dehumidifier
Function, the computer will power on automatically to dehumidi-
fy the system after entering S4/S5 state.
ASRock Easy RAID Installer
ASRock Easy RAID Installer can help you to copy the RAID
driver from a support CD to your USB storage device. After
copying the RAID driver to your USB storage device, please
change “SATA Mode” to “RAID”, then you can start installing the
OS in RAID mode.

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ASRock FM2A75M-DGS Motherboard
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ASRock Interactive UEFI
ASRock Interactive UEFI is a blend of system configuration
tools, cool sound effects and stunning visuals. The unprec-
edented UEFI provides a more attractive interface and brings a
lot more amusement.

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ASRock FM2A75M-DGS Motherboard
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2. Installation
This is a Micro ATX form factor (8.9-in x 7.6-in, 22.6 cm x 19.3 cm) motherboard.
Before you install the motherboard, study the configuration of your chassis to ensure
that the motherboard fits into it.
Pre-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 elec-
tricity, 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 mother-
board to the chassis, please do not over-tighten the screws! Doing
so may damage the motherboard.

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2.1 CPU Installation
Step 1. Unlock the socket by lifting the lever up to a 90oangle.
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.
2.2 Installation of CPU Fan and Heatsink
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 dis-
sipation. 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. 4). For proper instal-
lation, please kindly refer to the instruction manuals of the CPU fan and
the heatsink.
STEP 1:
Lift Up The Socket Lever
STEP 2 / STEP 3:
Match The CPU Golden Triangle
To The Socket Corner Small
Triangle
STEP 4:
Push Down And Lock
The Socket Lever
CPU Golden Triangle
Lever 90° Up
Socket Corner Small
Triangle

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2.3 Installation of Memory Modules (DIMM)
This motherboard provides two 240-pin DDR3 (Double Data Rate 3) 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 DDR3 DIMM slots to activate Dual Channel Memory
Technology. Otherwise, it will operate at single channel mode.
1. It is not allowed to install a DDR or DDR2 memory module into
DDR3 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 activate the Dual Channel
Memory Technology.
Installing 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.
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.
notch
break
notch break

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2.4 Expansion Slots (PCI and PCI Express Slots)
There is 1 PCI slot 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 x16 slot) is used for PCI Express x16 lane width graphics
cards.
PCIE2 (PCIE x1 slot) is used for PCI Express cards with x1 lane width
cards, such as Gigabit LAN card and SATA2 card.
Installing 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 system unit cover (if your motherboard is already installed
in a chassis).
Step 3. Remove the bracket facing the slot that you intend to use. Keep the
screws for later use.
Step 4. Align the card connector with the slot and press firmly until the card is
completely seated on the slot.
Step 5. Fasten the card to the chassis with screws.
Step 6. Replace the system cover.

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2.5 Jumpers 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 placed on pins, the jumper is “Open”. The
illustration shows a 3-pin jumper whose
pin1 and pin2 are “Short” when jumper cap
is placed on these 2 pins.
Jumper Setting Description
Clear CMOS Jumper
(CLRCMOS1)
(see p.2, No. 30)
Note: CLRCMOS1 allows you to clear the data in CMOS. To clear and reset the
system parameters to default setup, please turn off the computer and unplug
the power cord from the power supply. After waiting for 15 seconds, use a
jumper cap 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 clear-CMOS ac-
tion. Please be noted that the password, date, time, user default profile, 1394
GUID and MAC address will be cleared only if the CMOS battery is removed.
Clear CMOSDefault

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2.6 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!
Serial ATA3 Connectors These six Serial ATA3
(SATA_1: see p.2, No. 7) (SATA3) connectors support
(SATA_2: see p.2, No. 8) SATA data cables for internal
(SATA_3: see p.2, No. 9) storage devices. The current
(SATA_4: see p.2, No. 10) SATA3 interface allows up to
(SATA_5: see p.2, No. 12) 6.0 Gb/s data transfer rate.
(SATA_6: see p.2, No. 11)
Serial ATA (SATA) Either end of the SATA data
Data Cable cable can be connected to the
(Optional) SATA3 hard disk or the SATA3
connector on this motherboard.
USB 2.0 Headers Besides four default USB 2.0
(9-pin USB4_5) ports on the I/O panel, there
(see p.2 No. 20) are three USB 2.0 headers on
this motherboard. Each USB 2.0
header can support two USB
2.0 ports.
(9-pin USB6_7)
(see p.2 No. 22)
(9-pin USB8_9)
(see p.2 No. 21)
SATA_6 SATA_4 SATA_2
SATA_5 SATA_3 SATA_1
1
USB_PWR
P-8
GND
DUMMY
USB_PWR
P+8
GND
P-9 P+9
P-7
P+7
GND
DUMMY
USB_PWR
USB_PWR
P-6P+6
GND
1

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ASRock FM2A75M-DGS Motherboard
English
Infrared Module Header This header supports an
(5-pin IR1) optional wireless transmitting
(see p.2 No. 27) and receiving infrared module.
Front Panel Audio Header This is an interface for the front
(9-pin HD_AUDIO1) panel audio cable that allows
(see p.2 No. 25) convenient connection and
control of audio devices.
Consumer Infrared Module Header This header can be used to
(4-pin CIR1) connect the remote
(see p.2 No. 23) controller receiver.
1
IRTX
+5VSB
DUMMY
IRRX
GND
J_SENSE
OUT2_L
1
MIC_RET
PRESENCE#
GND
OUT2_R
MIC2_R
MIC2_L
OUT_RET
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. To activate the front mic.
For Windows®XP OS:
Select “Mixer”. Select “Recorder”. Then click “FrontMic”.
For Windows®7 / 7 64-bit / VistaTM / VistaTM 64-bit OS:
Go to the "FrontMic" Tab in the Realtek Control panel. Adjust
“Recording Volume”.
USB 3.0 Header Besides two default USB 3.0
(19-pin USB3_2_3) ports on the I/O panel, there is
(see p.2, No. 19) one USB 3.0 header on this
motherboard. This USB 3.0
header can support two USB 3.0
ports.
1
ID IntA_P1_D+
IntA_P1_D-
GND
IntA_P1_SSTX+
IntA_P1_SSTX-
GND
IntA_P1_SSRX+
IntA_P1_SSRX-
Vbus
IntA_P2_D+
IntA_P2_D-
GND
IntA_P2_SSTX+
IntA_P2_SSTX-
GND
IntA_P2_SSRX+
IntA_P2_SSRX-
Vbus

19
ASRock FM2A75M-DGS Motherboard
English
Chassis Speaker Header Please connect the chassis
(4-pin SPEAKER 1) speaker to this header.
(see p.2 No. 14)
+5V DUMMY
DUMMY
SPEAKER
1
System Panel Header This header accommodates
(9-pin PANEL1) several system front panel
(see p.2 No. 17) functions.
Connect the power switch, reset switch and system status indicator
on the chassis to this header according to the pin assignments below.
Note the positive and negative pins before connecting the cables.
PWRBTN (Power Switch):
Connect to the power switch on the chassis front panel. You may con-
figure the way to turn off your system using the power switch.
RESET (Reset Switch):
Connect to the reset switch on the chassis front panel. Press the reset
switch to restart the computer if the computer freezes and fails to per-
form a normal restart.
PLED (System Power LED):
Connect to the power status indicator on the chassis front panel. The
LED is on when the system is operating. The LED keeps blinking
when the sys-tem is in S1 sleep state. The LED is off when the system
is in S3/S4 sleep state or powered off (S5).
HDLED (Hard Drive Activity LED):
Connect to the hard drive activity LED on the chassis front panel. The
LED is on when the hard drive is reading or writing data.
The front panel design may differ by chassis. A front panel module
mainly consists of power switch, reset switch, power LED, hard drive
activity LED, speaker and etc. When connecting your chassis front
panel module to this header, make sure the wire assignments and the
pin assign-ments are matched correctly.
Print Port Header This is an interface for print
(25-pin LPT1) port cable that allows
(see p.2 No. 18) convenient connection of printer
devices.
1
AFD#
ERROR#
PINIT# GND
SLIN#
STB#
SPD0
SPD1
SPD2
SPD3
SPD4
SPD5
SPD6
SPD7
ACK#
BUSY
PE
SLCT

20
ASRock FM2A75M-DGS Motherboard
English
CPU Fan Connectors Please connect the CPU fan
(4-pin CPU_FAN1) cable to the connector and
(see p.2 No. 4) match the black wire to the
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.
ATX Power Connector Please connect an ATX power
(24-pin ATXPWR1) supply to this connector.
(see p.2 No. 6)
12
1
Though this motherboard provides 24-pin ATX power connector,
it can still work if you adopt a traditional 20-pin ATX power supply.
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
Pin 1-3 Connected
3-Pin Fan Installation
12
1
24
13
24
13
GND
+12V
CPU_FAN_SPEED
FAN_SPEED_CONTROL
1 2 3 4
Chassis and Power Fan Connectors Please connect the fan cables
(4-pin CHA_FAN1) to the fan connectors and
(see p.2 No. 16) match the black wire to the
ground pin. CHA_FAN1 fan
(3-pin PWR_FAN1) speed can be controlled through
(see p.2 No. 31) UEFI or AXTU.
GND
+12V
PWR_FAN_SPEED
Serial port Header This COM1 header supports a
(9-pin COM1) serial port module.
(see p.2 No.24)
ATX 12V Power Connector Please connect an ATX 12V
(4-pin ATX12V1) power supply to this connector.
(see p.2, No. 1)
GND
+12V
CHA_FAN_SPEED
FAN_SPEED_CONTROL