Intel GA-8N775 User Manual
GA-8N775
Intel® Pentium® 4 LGA775 Processor Motherboard
User's Manual
Rev. 1002
12ME-8N775-1002R
* The WEEE marking on the product indicates this product must not be disposed of with user's other household waste
* The WEEE marking on the product indicates this product must not be disposed of with user's other household waste
and must be handed over to a designated collection point for the recycling of waste electrical and electronic equipment!!
and must be handed over to a designated collection point for the recycling of waste electrical and electronic equipment!!
* The WEEE marking applies only in European Union's member states.
* The WEEE marking applies only in European Union's member states.
Dec. 9, 2005
Motherboard
GA-8N775
Dec. 9, 2005
GA-8N775
Motherboard
Copyright
© 2005 GIGA-BYTE TECHNOLOGY CO., LTD. All rights reserved.
The trademarks mentioned in the manual are legally registered to their respective companies.
Notice
The written content provided with this product is the property of Gigabyte.
No part of this manual may be reproduced, copied, translated, or transmitted in any form or by any
means without Gigabyte's prior written permission. Specifications and features are subject to
change without prior notice.
Product Manual Classification
In order to assist in the use of this product, Gigabyte has categorized the user manual in the
following:
For quick installation, please refer to the "Hardware Installation Guide" included with the
product.
For detailed product information and specifications, please carefully read the
"Product User Manual".
For detailed information related to Gigabyte's unique features, please go to "Technology
Guide" section on Gigabyte's website to read or download the information you need.
For more product details, please click onto Gigabyte's website at www.gigabyte.com.tw
Table of Contents
GA-8N775 Motherboard Layout .................................................................................... 6
Block Diagram ................................................................................................................ 7
Chapter 1 Hardware Installation ..................................................................................... 9
1-1 Considerations Prior to Installation .................................................................... 9
1-2 Feature Summary .......................................................................................... 10
1-3 Installation of the CPU and Heatsink .............................................................. 12
1-3-1 Installation of the CPU ......................................................................................... 12
1-3-2 Installation of the Heatsink .................................................................................. 13
1-4 Installation of Memory .................................................................................... 14
1-5 Installation of Expansion Cards ...................................................................... 16
1-6 I/O Back Panel Introduction ........................................................................... 17
1-7 Connectors Introduction .................................................................................. 18
Chapter 2 BIOS Setup ................................................................................................ 29
The Main Menu (For example: BIOS Ver. : E5) ....................................................... 30
2-1 Standard CMOS Features ............................................................................. 32
2-2 Advanced BIOS Features .............................................................................. 34
2-3 Integrated Peripherals ..................................................................................... 36
2-4 Power Management Setup ............................................................................. 39
2-5 PnP/PCI Configurations................................................................................. 41
2-6 PC Health Status ........................................................................................... 42
2-7 MB Intelligent Tweaker(M.I.T.) ....................................................................... 44
2-8 Load Fail-Safe Defaults ................................................................................... 46
2-9 Load Optimized Defaults ................................................................................. 46
2-10 Set Supervisor/User Password ..................................................................... 47
2-11 Save & Exit Setup ......................................................................................... 48
2-12 Exit Without Saving ....................................................................................... 48
- 4 -
Chapter 3 Drivers Installation ...................................................................................... 49
3-1 Install Chipset Drivers .................................................................................... 49
3-2 Software Application ....................................................................................... 50
3-3 Software Information ....................................................................................... 50
3-4 Hardware Information ..................................................................................... 51
3-5 Contact Us ..................................................................................................... 51
Chapter 4 Appendix ................................................................................................... 53
4-1 Unique Software Utilities ................................................................................ 53
4-1-1 EasyTune 5 Introduction ..................................................................................... 54
4-1-2 Xpress Recovery2 Introduction ......................................................................... 55
4-1-3 Flash BIOS Method Introduction ........................................................................ 57
4-1-4 Configuring SATA Hard Drive(s) ........................................................................ 66
4-1-5 2- / 4- / 6- / 8- Channel Audio Function Introduction ...................................... 80
4-2 Troubleshooting ............................................................................................... 84
- 5 -
GA-8N775 Motherboard Layout
KB_MS
COAXIAL
SPDIF_O
COMA
USB
USB
AUDIO1
AUDIO2
F_AUDIO
CODEC
LPT
CD_IN
LAN
BIOS
CPU_FAN
Marvell
88E1111/
88E1115
PCIE_1
PCIE_16
PCIE_2
PCIE_3
SPDIF_IN
ATX_12V
RF_ID
LGA775
nVIDIA
Crush 19
ATX
FDD
®
IDE2
IDE1
DDRII1
DDRII2
DDRII3
DDRII4
GA-8N775
®
nVIDIA
MCP-04
SYS_FAN
CLR_CMOS
PCI1
BATTERY
IT8712F
PCI2
F_USB1
CI
F_USB2
F_USB3
SATAII2_3
PWR_LED
SATAII0_1
F_PANEL
- 6 -
Block Diagram
1 PCIE x 16
PCI-ECLK
(100MHz)
PCI-ECLK
(100MHz)
PCI Express x 16 Bus
PCI Express Bus
x1
x1
x1
3 PCI Express x 1
LAN
RJ45
Marvell
88E1111/
88E1115
PCI Bus
Processor
Crush 19
CODEC
LGA775
nVIDIA
nVIDIA
MCP-04
Host
Interface
®
®
CPUCLK+/-(1066/800/533MHz)
DDRII 667/533MHz DIMM
Dual Channel Memory
NBCLK (25MHz)
HCLK+/- (133/200/266MHz)
33MHz
25MHz
48MHz
BIOS
ROMCLK33MHz
4 SATA 3Gb/s
ATA33/66/100/133
IDE Channels
LPC BUS
IT8712F
24 MHz
Floppy
LPT Port
COM Port
2 PCI
PCICLK
(33MHz)
MIC
Line-In
Line-Out
SPDIF In
SPDIF Out
24.576MHz
Side Speaker Out
Surround Speaker Out
Center/Subwoofer Speaker Out
- 7 -
10 USB
Ports
PS/2 KB/Mouse
33 MHz
- 8 -
Chapter 1 Hardware Installation
1-1 Considerations Prior to Installation
Preparing Your Computer
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
1-2 Feature Summary
CPU Supports LGA775 Intel® Pentium® 4 Processor
L2 cache varies with CPU
Front Side Bus Supports 1066/800/533MHz FSB
Chipset Northbridge: nVIDIA® Crush 19 Chipset
Southbridge: nVIDIA® MCP-04
LAN Onboard Marvell 88E1111/88E1115 chip (10/100/1000 Mbit)
Audio Onboard Realtek ALC850 chip
Supports 2 / 4 / 6/ 8 channel audio
Supports SPDIF In/Out connection
Supports CD In connection
Storage nVIDIA® MCP-04 Southbrigde
- 1 FDD connector, allowing connection of 2 FDD devices
- 2 IDE connectors (IDE1, IDE2) with UDMA 33/ATA 66/ATA 100/ATA 133
suppport, allowing connection of 4 IDE devices
- 4 SATA 3Gb/s connectors (SATAII0_1, SATAII2_3), allowing connection
of 4 SATA 3Gb/s devices
- Supports data striping (RAID 0), mirroring (RAID 1),
striping + mirroring (RAID 0+1), and RAID 5 for Serial ATA
O.S Support Microsoft Windows 2000/XP
Memory 4 DDR II DIMM memory slots (supports up to 8GB memory)
Supports dual channel DDR II 667
(Note 3)
Supports 1.8V DDR II DIMMs
Expanstion Slots 1 PCI Express x 16 slot
3 PCI Express x 1 slots
2 PCI slots
Internal Connectors 1 24-pin ATX power connector
1 4-pin ATX 12V power connector
1 floppy connector
2 IDE connectors
4 SATA 3Gb/s connectors
1 CPU fan connector
1 system fan connector
1 front panel connector
1 front audio connector
1 CD In connector
1 SPDIF In connector
3 USB 2.0/1.1 connectors for additional 6 ports by cables
1 RF_ID connector
(Note 1)
/533 unbuffered DIMMs
(Note 2)
GA-8N775 Motherboard - 10 -
Rear Panel I/O 1 PS/2 keyboard port
1 PS/2 mouse port
1 parallel port
2 SPDIF Out ports (coaxial and optical)
1 serial port (COMA)
4 USB 2.0/1.1 ports
1 RJ-45 port
6 audio jacks (Line In / Line Out / MIC In / Surround Speaker Out (Rear
Speaker Out) / Center/Subwoofer Speaker Out / Side Speaker Out)
I/O Control IT8712F chip
Hardware Monitor System voltage detection
CPU temperature detection
CPU / System fan speed detection
CPU warning temperature
CPU / System fan failure warning
CPU smart fan control
BIOS 1 4Mbit flash ROM
Use of licensed AWARD BIOS
Additional Features Supports @BIOS
Supports Download Center
Supports Q-Flash
Supports EasyTune
Supports Xpress Install
Supports Xpress Recovery2
Supports Xpress Rescue
Bundle Software Norton Internet Security (OEM version)
Form Factor ATX form factor; 30.5cm x 24.4cm
(Note 4)
English
(Note 1) For further CPU support information, please go to GIGABYTE's website.
(Note 2) 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, 8 GB of
memory size will instead be shown as 7.xxGB memory during system startup.
(Note 3) To use a DDR II 667 memory module on the motherboard, you must install an 800/1066MHz
FSB processor.
(Note 4) EasyTune functions may vary depending on different motherboards.
Hardware Installation- 11 -
English
1-3 Installation of the CPU and Heatsink
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.
HT functionality requirement content :
Enabling the functionality of Hyper-Threading Technology for your computer system requires all of the following platform components:
- CPU: An Intel® Pentium® 4 Processor with HT Technology
- Chipset: A VIA Chipset that supports HT Technology
- BIOS: A BIOS that supports HT Technology and has it enabled
- OS: An operation system that has optimizations for HT Technology
1-3-1 Installation of the CPU
Metal Lever
Fig. 1
Gently lift the metal
lever located on the
CPU socket to the
upright position.
Fig. 2
Remove the plastic
covering on the CPU
socket.
Fig. 3
Notice the small gold
colored triangle
located on the edge of
the CPU socket.
Align the indented
corner of the CPU with
the triangle and gently insert the CPU into position.
(Grasping the CPU firmly between your thumb
and forefinger, carefully place it into the socket in a
straight and downwards motion. Avoid twisting or
bending motions that might cause damage to the
CPU during installation.)
GA-8N775 Motherboard - 12 -
Fig. 4
Once the CPU is
properly inserted,
please replace the
load plate and push the
metal lever back into
its original position.
1-3-2 Installation of the Heatsink
English
Male Push Pin
The top of Female Push Pin
Female Push Pin
Fig.1
Please apply an even layer of heatsink paste on
the surface of the installed CPU.
Fig. 3
Place the heatsink atop the CPU and make sure
the push pins aim to the pin hole on the
motherboard.Pressing down the push pins
diagonally.
Fig. 5
Please check the back of motherboard after
installing. If the push pin is inserted as the picture,
the installation is complete.
Fig. 2
(Turning the push pin along the direction of arrow is to
remove the heatsink, on the contrary, is to install.)
Please note the direction of arrow sign on the male
push pin doesn't face inwards before installation. (This
instruction is only for Intel boxed fan)
Fig. 4
Please make sure the Male and Female push pin
are joined closely. (for detailed installation
instructions, please refer to the heatsink installation
section of the user manual)
Fig. 6
Finally, please attach the power connector of the
heatsink to the CPU fan header located on the
motherboard.
The heatsink may adhere to the CPU as a result of hardening of the heatsink 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 heatsink.
Hardware Installation- 13 -
English
1-4 Installation 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 II 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 II
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-8N775 Motherboard - 14 -
Dual Channel Memory Configuration
The GA-8N775 supports the Dual Channel Technology. After operating the
Dual Channel Technology, the bandwidth of Memory Bus will add double.
GA-8N775 includes 4 DIMM sockets, and each Channel has two DIMM sockets as following:
Channel A : DDR II 1, DDR II 2
Channel B : DDR II 3, DDR II 4
If you want to operate the Dual Channel Technology, please note the following explanations due to the
limitation of Intel chipset specifications.
1. Dual Channel mode will not be enabled if only one DDR II memory module is installed.
2. To enable Dual Channel mode with two or four 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.
The following is a Dual Channel Memory configuration table: (DS: Double Side, SS: Single Side)
DDR II 1 DDR II 2 DDR II 3 DDR II 4
2 memory modules
4 memory modules
DS/SS X DS/SS X
X DS/SS X DS/SS
DS/SS DS/SS DS/SS DS/SS
English
Hardware Installation- 15 -
English
1-5 Installation 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 a PCI Express x 16 expansion card:
Please carefully pull out the small whitedrawable bar at the end of the PCI Express x 16 slot when you try to install/
uninstall the VGA card. Please align the
VGA card to the onboard PCI Express x
16 slot and press firmly down on the slot.
Make sure your VGA card is locked by
the small white-drawable bar.
GA-8N775 Motherboard - 16 -
1-6 I/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).
LPT (Parallel Port)
The parallel port allows connection of a printer, scanner and other peripheral devices.
COAXIAL (SPDIF_O)
The SPDIF coaxial output port is capable of providing digital audio to external speakers or
compressed AC3 data to an external Dolby Digital Decoder via a coaxial cable.
OPTICAL (SPDIF_O)
The SPDIF optical output port is capable of providing digital audio to external speakers or
compressed AC3 data to an external Dolby Digital Decoder via an optical cable.
COM A (Serial Port)
Connects to serial-based mouse or data processing devices.
LAN Port
The provided Internet connection is Gigabit Ethernet, providing data transfer speeds of 10/100/
1000Mbps.
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.
Line In
The default Line In jack. Devices like CD-ROM, walkman etc. can be connected to Line In jack.
Line Out (Front Speaker Out)
Connect the stereo speakers, earphone or front surround speakers to this connector.
MIC In
Microphone can be connected to MIC In jack.
Rear Speaker Out
Connect the rear surround speakers to this connector.
Center/Subwoofer Speaker Out
Connect the Center/Subwoofer speakers to this connector.
English
Hardware Installation- 17 -
Side Speaker Out
Connect the side surround speakers to this connector.
English
You can use audio software to configure 2-/4-/6-/8-channel audio functioning.
1-7 Connectors Introduction
3
11
1
12
13
16
14
2
5
6
4
15
9
7
8
1017
1) ATX_12V
2) ATX (Power Connector)
3) CPU_FAN
4) SYS_FAN
5) FDD
6) IDE1 / IDE2
7) SATAII0_1 / SATAII2_3
8) PWR_LED
17) RF_ID
9) BATTERY
GA-8N775 Motherboard - 18 -
10) F_PANEL
11) F_AUDIO
12) CD_IN
13) SPDIF_IN
14) F_USB1 / F_USB2 / F_USB3
15) CLR_CMOS
16) C I
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.
If you use a 24-pin ATX power supply, please remove the small cover on the power connector
on the motherboard before plugging in the power cord ; otherwise, please do not remove it.
Pin No. Definition
3
1
4
2
1 GND
2 GND
3 +12V
4 +12V
English
13
24
1
12
Pin No. Definition
1 3.3V
2 3.3V
3 GND
4 +5V
5 GND
6 +5V
7 GND
8 Power Good
9 5V SB(stand by +5V)
10 +12V
11 +12V(Only for 24-pin ATX)
12 3.3V(Only for 24-pin ATX)
Pin No. Definition
13 3.3V
14 -12V
15 GND
16 PS_ON(soft On/Off)
17 GND
18 GND
19 GND
20 -5V
21 +5V
22 +5V
23 +5V (Only for 24-pin ATX)
24 GND(Only for 24-pin ATX)
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/4-pin (only for
CPU_FAN) 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.
1
CPU_FAN
1
SYS_FAN
Pin No. Definition
1 GND
2 +12V
3 Sense
4 Speed Control
(Only for CPU_FAN)
5) FDD (Floppy 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.
34
33
GA-8N775 Motherboard - 20 -
2
1
6) 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). To ensure that an IDE CD-ROM drive can work properly, please attach it to the IDE 1 /
IDE 2 connector.
3940
12
IDE2 IDE1
7) SATAII0_1 / SATAII2_3 (SATA 3Gb/s Connectors, Controlled by MCP-04)
SATA 3Gb/s can provide up to 300MB/s transfer rate. Please refer to the BIOS setting for the SATA
3Gb/s and install the proper driver in order to work properly.
English
Pin No. Definition
71
17
1 GND
2 TXP
3 TXN
4 GND
5RXN
6 RXP
7 GND
Hardware Installation- 21 -
English
8) 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.
9) BATTERY
1
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended
by the manufacturer.
Dispose of used batteries according to the manufacturer's
instructions.
If you want to erase CMOS...
1. Turn OFF the computer and unplug the power cord.
2. Take out the battery gently and put it aside for about 10
minutes (Or you can use a metal object to connect the
positive and negative pins in the battery holder to make
them short for one minute).
3. Re-install the battery.
4. Plug the power cord and turn ON the computer.
Pin No. Definition
1 MPD+
2 MPD-
3 MPD-
GA-8N775 Motherboard - 22 -
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.
Message LED/
Power/
Sleep LED
MSG+
2
1
HD+
IDE Hard Disk Active LED
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
Power
Switch
PW+
MSG-
HD-
RES+
RES-
Reset Switch
Speaker Connector
PW-
NC
SPEAK+
SPEAK-
20
19
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
10 9
2
1
1 MIC
2 GND
3 MIC_BIAS
4 Power
5 FrontAudio(R)
6 Rear Audio (R)/ Return R
7NC
8 No Pin
9 FrontAudio (L)
10 Rear Audio (L)/ Return L
12) CD_IN (CD IN)
Connect CD-ROM or DVD-ROM audio out to the connector.
GA-8N775 Motherboard - 24 -
1
Pin No. Definition
1 CD-L
2 GND
3 GND
4 CD-R
13) SPDIF_I (SPDIF In Connector)
Use SPDIF IN feature only when your device has digital output function. Be careful with the polarity
of the SPDIF_I connector. Check the pin assignment carefully while you connect the SPDIF cable,
incorrect connection between the cable and connector will make the device unable to work or even
damage it. For optional SPDIF cable, please contact your local dealer.
English
1
Pin No. Definition
1 Power
2 SPDIFI
3 GND
14) F_ USB1 / F_USB2 / F_USB3 (Front USB Connector)
Be careful with the polarity of the front USB connector. Check the pin assignment carefully while
you connect the front USB cable, incorrect connection between the cable and connector will make
the device unable to work or even damage it. For optional front USB cable, please contact your
local dealer.
Pin No. Definition
910
12
1 Power(5V)
2 Power(5V)
3 USB DX-
4 USB Dy-
5 USB DX+
6 USB Dy+
7 GND
8 GND
9 No Pin
10 NC
Hardware Installation- 25 -
English
15) CLR_CMOS (Clear CMOS)
You may clear the CMOS data to its default values by this header. To clear CMOS, temporarily
short 1-2 pin. Default doesn't include the jumper to prevent from improper use of this header.
1
Open: Normal
Short: Clear CMOS
1
16) CI (Chassis Intrusion, Case Open)
This 2-pin connector allows your system to detect if the chassis cover is removed. You can check
the "Case Opened" status in BIOS Setup.
GA-8N775 Motherboard - 26 -
Pin No. Definition
1 Signal
1
2 GND
17) RF_ID
This connector allows you to connect external devices to use extra function. Check the pin
assignments before you connect the external device cable. Please contact your nearest dealer for
the optional GIGABYTE external device.
English
26
1
5
Pin No. Definition
1 Power
2 RFID_RI-
3 RF_TXD
4 RF_RXD
5 No Pin
6 GND
Hardware Installation- 27 -
Loading...