The motherboard contains numerous delicate electronic circuits and components which can
become damaged as a result of electrostatic discharge (ESD). Thus, prior to installation, please
follow the instructions below:
1. Please turn off the computer and unplug its power cord.
2. When handling the motherboard, avoid touching any metal leads or connectors.
3. It is best to wear an electrostatic discharge (ESD) cuff when handling electronic components
(CPU, RAM).
4. Prior to installing the electronic components, please have these items on top of an antistatic
pad or within a electrostatic shielding container.
5. Please verify that the power supply is switched off before unplugging the power supply
connector from the motherboard.
Installation Notices
1. Prior to installation, please do not remove the stickers on the motherboard. These stickers
are required for warranty validation.
2. Prior to the installation of the motherboard or any hardware, please first carefully read the
information in the provided manual.
3. Before using the product, please verify that all cables and power connectors are connected.
4. To prevent damage to the motherboard, please do not allow screws to come in contact with
the motherboard circuit or its components.
5. Please make sure there are no leftover screws or metal components placed on the motherboard
or within the computer casing.
6. Please do not place the computer system on an uneven surface.
7. Turning on the computer power during the installation process can lead to damage to system
components as well as physical harm to the user.
8. If you are uncertain about any installation steps or have a problem related to the use of the
product, please consult a certified computer technician.
English
Instances of Non-Warranty
1. Damage due to natural disaster, accident or human cause.
2. Damage as a result of violating the conditions recommended in the user manual.
3. Damage due to improper installation.
4. Damage due to use of uncertified components.
5. Damage due to use exceeding the permitted parameters.
6. Product determined to be an unofficial Gigabyte product.
Hardware Installation- 9 -
English
1-2Feature Summary
CPU Socket 939 for AMD AthlonTM 64 / 64 FX processor (K8)
1600MT/s system bus
Supports core frequencies in excess of 3000+ and faster
Chipset nVIDIA® nForce3TM 250Gb/250 Ultra Chipset
Memory 4 DDR DIMM memory slots (supports up to 4GB memory)
Supports dual channel DDR 400/333/266/200 DIMM
Slots 1 AGP slot supports 8X/4X (1.5V) mode
5 PCI slots
IDE Connections 2 IDE connection (UDMA 33/ATA 66/ATA 100/ATA 133), allows connection
of 4 IDE devices
FDD Connections 1 FDD connection, allows connection of 2 FDD devices
Onboard SATA 2 Serial ATA ports from nVIDIA® nForce3TM 250Gb/250 Ultra (SATA0_SB,
SATA1_SB)
Peripherals 1 parallel port supporting Normal/EPP/ECP mode
2 serial ports (COMA, COMB)
8 USB 2.0/1.1 ports (rear x 4, front x 4 via cable)
1 front audio connector
1 IR/CIR connector
1 PS/2 keyboard port
1 PS/2 mouse port
Supports Jack Sensing function
Supports 2 / 4 / 6 / 8 channel audio
Supports Line In ; Line Out ;MIC
Surround Back Speaker (by optional Audio Combo Kit)
SPDIF In/Out connection
CD In connection
I/O Control IT8712
(Note 2)
(Note 1)
(Note 1) Due to standard PC architecture, a certain amount of memory is reserved for system usage and
therefore the actual memory size is less than the stated amount.
For example, 4GB of memory size will instead be shown as 3.xxGB memory during system
startup.
(Note 2) To set up an 8 channel audio configuration, you must use Audio Combo Kit (optional device).
GA-K8NSC-939 Motherboard- 10 -
Hardware Monitor System voltage detection
CPU temperature detection
CPU / System fan speed detection
CPU warning temperature
CPU / System fan failure warning
Thermal shutdown function
Supports data striping (RAID 0), mirroring (RAID 1), or striping + mirroring
(RAID 0+1) function
Supports data transfer rate of up to 150 MB/s
Supports a maximum of 2 SATA connections
BIOS Use of licensed AWARD BIOS
Supports Q-Flash
Additional Features Supports @BIOS
Supports EasyTune
Overclocking Over Voltage via BIOS (CPU/ DDR/ AGP/ HT-Link)
Over Clock via BIOS (CPU/ AGP)
Form Factor ATX form factor; 30.5cm x 24.4cm
(Note 3)
English
(Note 3) EasyTune functions may vary depending on different motherboards.
Hardware Installation- 11 -
1-3Installation of the CPU and Heatsink
English
Before installing the CPU, please comply with the following conditions:
1. Please make sure that the motherboard supports the CPU.
2. Please take note of the one indented corner of the CPU. If you install the CPU in the wrong
direction, the CPU will not insert properly. If this occurs, please change the insert direction
of the CPU.
3. Please add an even layer of heat sink paste between the CPU and heatsink.
4. Please make sure the heatsink is installed on the CPU prior to system use, otherwise
overheating and permanent damage of the CPU may occur.
5. Please set the CPU host frequency in accordance with the processor specifications. It is not
recommended that the system bus frequency be set beyond hardware specifications since it
does not meet the required standards for the peripherals. If you wish to set the frequency
beyond the proper specifications, please do so according to your hardware specifications
including the CPU, graphics card, memory, hard drive, etc.
1-3-1 Installation of the CPU
Check the processor pins to see that none are bent. Move the socket lever to the unlocked position as
shown in Fig. 1 (90o to the plane of the motherboard) prior to inserting the processor. The pin 1 location
is designated on the processor by a copper triangle that corresponds to a triangle marking on the socket
as shown in Fig. 2. Align the processor to the socket and gently lower it into place. Do not force the
processor into the socket.
Socket Lever
Fig.1
Position lever at a 90-degree angle.
Fig.2
Pin 1 location on the socket and processor.
Gently place the CPU into position making sure that the CPU pins fit
perfectly into their holes. Once the CPU is positioned into its socket,
place one finger down on the middle of the CPU and gently press the
metal lever back into its original position.
Please use extra care when installing the CPU. The CPU will not fit if positioned incorrectly.
Rather than applying force, please change the positioning of the CPU.
GA-K8NSC-939 Motherboard- 12 -
1-3-2 Installation of the Heatsink
Fig.1
Before installing the heat sink, please first add an even layer of heat sink
paste on the surface of the CPU. Install all the heat sink components (Please
refer to the heat sink manual for detailed installation instructions).
Fig.2
Please connect the heat sink power connector to the CPU_FAN connector
located on the motherboard so that the heat sink can properly function to
prevent CPU overheating.
The heat sink may adhere to the CPU as a result of hardening of the heat sink paste. To prevent
such an occurrence, it is suggested that either thermal tape rather than heat sink paste be used for
heat dissipation or using extreme care when removing the heat sink.
English
Hardware Installation- 13 -
English
1-4Installation of Memory
Before installing the memory modules, please comply with the following conditions:
1. Please make sure that the memory used is supported by the motherboard. It is
recommended that memory of similar capacity, specifications and brand be used.
2. Before installing or removing memory modules, please make sure that the computer power
is switched off to prevent hardware damage.
3. Memory modules have a foolproof insertion design. A memory module can be installed in
only one direction. If you are unable to insert the module, please switch the direction.
The motherboard supports DDR memory modules, whereby BIOS will automatically detect memory capacity
and specifications. Memory modules are designed so that they can be inserted only in one direction. The
memory capacity used can differ with each slot.
Notch
DDR
Fig.1
The DIMM socket has a notch, so the DIMM memory module can only
fit in one direction. Insert the DIMM memory module vertically into the
DIMM socket. Then push it down.
Fig.2
Close the plastic clip at both edges of the DIMM sockets to lock the
DIMM module.
Reverse the installation steps when you wish to remove the DIMM
module.
GA-K8NSC-939 Motherboard- 14 -
Dual Channel Memory Configuration
The GA-K8NSC-939 supports the Dual Channel Technology. When the Dual Channel Technology is
activated, the bandwidth of memory bus will be double the original one.
Due to CPU limitation, if you want to operate the Dual Channel Technology, please follow the guidelines
below for Dual Channel memory configuration.
1. Dual Channel mode will not be enabled if only one DDR memory module is installed.
2. To enable Dual Channel mode with 2 memory modules (it is recommended to use memory
modules of identical brand, size, chips, and speed), you must install them into DIMM sockets
of the same color.
3. To enable Dual Channel mode with 4 memory modules, it is recommended to use memory
modules of identical brand, size, chips, and speed.
The following is a Dual Channel Memory configuration table: (DS: Double Side, SS: Single Side)
DDR 1DDR 2DDR 3DDR 4
2 memory modules
4 memory modules
If two memory modules are to be used to achieve Dual Channel mode, we recommend
installing them in DDR1 and DDR2 DIMM sockets.
All of the memory configurations below will cause system unable to boot.
(DS: Double Side, SS: Single Side)
1 memory module
2 memory modules
3 memory modules
DS/SSDS/SSXX
XXDS/SSDS/SS
DS/SSDS/SSDS/SSDS/SS
DDR 1DDR 2DDR 3DDR 4
XDS/SSXX
XXXDS/SS
XDS/SSDS/SSX
DS/SSXXDS/SS
XDS/SSXDS/SS
DS/SSDS/SSDS/SSX
XDS/SSDS/SSDS/SS
DS/SSXDS/SSDS/SS
DS/SSDS/SSXDS/SS
English
Hardware Installation- 15 -
English
1-5Installation of Expansion Cards
You can install your expansion card by following the steps outlined below:
1. Read the related expansion card's instruction document before install the expansion card into the
computer.
2. Remove your computer's chassis cover, screws and slot bracket from the computer.
3. Press the expansion card firmly into expansion slot in motherboard.
4. Be sure the metal contacts on the card are indeed seated in the slot.
5. Replace the screw to secure the slot bracket of the expansion card.
6. Replace your computer's chassis cover.
7. Power on the computer, if necessary, setup BIOS utility of expansion card from BIOS.
8. Install related driver from the operating system.
Installing an AGP VGA card:
Please carefully pull out the small whitedrawable bar at the end of the AGP slot
when you try to install/uninstall the VGA
card. Please align the VGA card to the
onboard AGP slot and press firmly down on
the slot. Make sure your VGA card is locked
by the small white-drawable bar.
GA-K8NSC-939 Motherboard- 16 -
1-6I/O Back Panel Introduction
PS/2 Keyboard and PS/2 Mouse Connector
To install a PS/2 port keyboard and mouse, plug the mouse to the upper port (green) and the keyboard to the
lower port (purple).
Parallel Port
The parallel port allows connection of a printer, scanner and other peripheral devices.
COMA, COMB (Serial Port)
Connects to serial-based mouse or data processing devices.
USB port
Before you connect your device(s) into USB connector(s), please make sure your device(s) such as
USB keyboard, mouse, scanner, zip, speaker...etc. have a standard USB interface. Also make sure
your OS supports USB controller. If your OS does not support USB controller, please contact OS
vendor for possible patch or driver upgrade. For more information please contact your OS or device(s)
vendors.
LAN Port
The provided Internet connection is Gigabit Ethernet, providing data transfer speeds of 10/100/1000Mbps.
Line In
Devices like CD-ROM, walkman etc. can be connected to Line In jack.
Line Out
Connect the stereo speakers, earphone or front surround speakers to this connector.
MIC In
Microphone can be connected to MIC In jack.
English
You can use audio software to configure 2-/4-/6-/8-channel audio functioning.
Hardware Installation- 17 -
1-7Connectors Introduction
English
11
12
13
16
1) ATX_12V
2) ATX (Power Connector)
3) CPU_FAN
4) SYS_FAN
5) NB_FAN
6) FDD
7) IDE1 / IDE2
8) SATA0_SB / SATA1_SB
9) PWR_LED
13
14
78
15
4
10) F_PANEL
11) F_AUDIO
12) CD_IN
13) SUR_CEN
14) SPDIF_IO
15) F_USB1 / F_USB2
16) IR_CIR
17) CLR_CMOS
18) BATTERY
2
6
18
5
17
10
9
GA-K8NSC-939 Motherboard- 18 -
1/2) ATX_12V / ATX (Power Connector)
With the use of the power connector, the power supply can supply enough stable power to all the
components on the motherboard. Before connecting the power connector, please make sure that all
components and devices are properly installed. Align the power connector with its proper location on
the motherboard and connect tightly.
The ATX_12V power connector mainly supplies power to the CPU. If the ATX_12V power connector
is not connected, the system will not start.
Caution!
Please use a power supply that is able to handle the system voltage requirements. It is
recommended that a power supply that can withstand high power consumption be used (300W or
greater). If a power supply is used that does not provide the required power, the result can lead to an
unstable system or a system that is unable to start.
English
31
42
10
1
Pin No.Definition
1GND
2GND
3+12V
4+12V
Pin No.Definition
13.3V
20
23.3V
3GND
4+5V
5GND
6+5V
7GND
8Power Good
95V SB (stand by +5V)
10+12V
11
113.3V
12-12V
13GND
14PS_ON(soft on/off)
15GND
16GND
17GND
18-5V
19+5V
20+5V
Hardware Installation- 19 -
English
3/4) CPU_FAN / SYS_FAN (Cooler Fan Power Connector)
The cooler fan power connector supplies a +12V power voltage via a 3-pin power connector and
possesses a foolproof connection design.
Most coolers are designed with color-coded power connector wires. A red power connector wire
indicates a positive connection and requires a +12V power voltage. The black connector wire is the
ground wire (GND).
Please remember to connect the power to the cooler to prevent system overheating and failure.
Caution!
Please remember to connect the power to the CPU fan to prevent CPU overheating and failure.
Pin No.Definition
1
CPU_FAN
1
SYS_FAN
1GND
2+12V
3Sense
5) NB_FAN (Chip Fan Power Connector)
If you install in wrong direction, the chip fan will not work and sometimes the chip fan will even be
damaged. (Usually black cable is GND.)
GA-K8NSC-939 Motherboard- 20 -
Pin No.Definition
1+12V
2GND
1
6) FDD (FDD Connector)
The FDD connector is used to connect the FDD cable while the other end of the cable connects to the
FDD drive. The types of FDD drives supported are: 360KB, 720KB, 1.2MB, 1.44MB and 2.88MB.
Please connect the red power connector wire to the pin1 position.
English
34
2
33
1
7) IDE1 / IDE2 (IDE Connector)
An IDE device connects to the computer via an IDE connector. One IDE connector can connect to one
IDE cable, and the single IDE cable can then connect to two IDE devices (hard drive or optical drive). If
you wish to connect two IDE devices, please set the jumper on one IDE device as Master and the other
as Slave (for information on settings, please refer to the instructions located on the IDE device).
40
39
2
1
IDE1IDE2
Hardware Installation- 21 -
English
8) SATA0_SB / SATA1_SB (Serial ATA Connector)
Serial ATA can provide up to 150MB/s transfer rate. Please refer to the BIOS setting for the Serial
ATA and install the proper driver in order to work properly.
Pin No.Definition
1
7
1GND
2TXP
3TXN
4GND
5RXN
6RXP
7GND
9) PWR_LED
PWR_LED is connected with the system power indicator to indicate whether the system is on/off.
It will blink when the system enters suspend mode.
GA-K8NSC-939 Motherboard- 22 -
Pin No.Definition
1MPD+
2MPD-
1
3MPD-
10) F_PANEL (Front Panel Jumper)
Please connect the power LED, PC speaker, reset switch and power switch etc. of your chassis front
panel to the F_PANEL connector according to the pin assignment below.
19
PW-
MSG-
20
NC
RES+
RES-
HD-
HD+
12
Speaker Connector
Power Switch
Message LED/
Power/
Sleep LED
SPEAK-
SPEAK+
PW+
MSG+
HD (IDE Hard Disk Active LED)Pin 1: LED anode(+)
(Blue)Pin 2: LED cathode(-)
SPEAK (Speaker Connector)Pin 1: Power
(Amber)Pin 2- Pin 3: NC
Pin 4: Data(-)
RES (Reset Switch)Open: Normal
(Green)Close: Reset Hardware System
PW (Power Switch)Open: Normal
(Red)Close: Power On/Off
MSG(Message LED/Power/Sleep LED)Pin 1: LED anode(+)
(Yellow)Pin 2: LED cathode(-)
NC (Purple)NC
Reset Switch
IDE Hard Disk
Active LED
English
Hardware Installation- 23 -
English
11) F_AUDIO (Front Audio Panel Connector)
If you want to use Front Audio connector, you must remove 5-6, 9-10 Jumper.
In order to utilize the front audio header, your chassis must have front audio connector. Also please
make sure the pin assignments for the cable are the same as the pin assignments for the front audio
header. To find out if the chassis you are buying support front audio connector, please contact your
dealer. Please note, you can have the alternative of using front audio connector or of using rear audio
connector to play sound.
Pin No.Definition
1MIC
910
2GND
3MIC_BIAS
12
4Power
5Front Audio (R)
6Rear Audio (R)/ Return R
7NC
8No Pin
9Front Audio (L)
10Rear Audio (L)/ Return L
12) CD_IN (CD In Connector)
Connect CD-ROM or DVD-ROM audio out to the connector.
GA-K8NSC-939 Motherboard- 24 -
Pin No.Definition
1
1CD-L
2GND
3GND
4CD-R
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