Gigabyte G1.Sniper B5 User manual

G1.Sniper B5
User's Manual
Rev. 1201
12ME-G1SNPB5-1201R

Motherboard
G1.Sniper B5
May 30, 2013
May 30, 2013
Motherboard
G1.Sniper B5
Copyright
©2014 GIGA-BYTE TECHNOLOGY CO., LTD. All rights reserved.
The trademarks mentioned in this manual are legally registered to their respective owners.
Disclaimer
Information in this manual is protected by copyright laws and is the property of GIGABYTE.
Changes to the specications and features in this manual may be made by GIGABYTE without prior notice.
No part of this manual may be reproduced, copied, translated, transmitted, or published in any form or by
any means without GIGABYTE's prior written permission.
For quick set-up of the product, read the Quick Installation Guide included with the product.
In order to assist in the use of this product, carefully read the User's Manual.
For product-related information, check on our website at: http://www.gigabyte.com
Identifying Your Motherboard Revision
The revision number on your motherboard looks like this: "REV: X.X." For example, "REV: 1.0" means the
revision of the motherboard is 1.0. Check your motherboard revision before updating motherboard BIOS,
drivers, or when looking for technical information.
Example:

- 3 -
Table of Contents
G1.Sniper B5 Motherboard Layout..................................................................................4
G1.Sniper B5 Motherboard Block Diagram.....................................................................5
Chapter 1 Hardware Installation .....................................................................................6
1-1 Installation Precautions ................................................................................... 6
1-2 Product Specications..................................................................................... 7
1-3 Installing the CPU ............................................................................................ 9
1-4 Installing the Memory .................................................................................... 10
1-5 Installing an Expansion Card......................................................................... 10
1-6 Back Panel Connectors................................................................................. 10
1-7 Changing the Operational Amplier .............................................................. 12
1-8 Internal Connectors ....................................................................................... 13
Chapter 2 BIOS Setup..................................................................................................19
2-1 Startup Screen............................................................................................... 19
2-2 M.I.T. .............................................................................................................. 20
2-3 System ........................................................................................................... 24
2-4 BIOS Features ............................................................................................... 25
2-5 Peripherals..................................................................................................... 28
2-6 Power Management....................................................................................... 31
2-7 Save & Exit .................................................................................................... 32
Chapter 3 Appendix.......................................................................................................33
Drivers Installation.................................................................................................... 33
Regulatory Statements............................................................................................. 34
Contact Us ................................................................................................................ 36

- 4 -
G1.Sniper B5 Motherboard Layout
The box contents above are for reference only and the actual items shall depend on the product package you obtain.
The box contents are subject to change without notice.
Box Contents
5G1.Sniper B5 motherboard
5Motherboard driver disk 5Two SATA cables
5User's Manual
5Quick Installation Guide
5I/O Shield
KB_MS CPU_FAN
LGA1150
ATX
G1.Sniper B5
F_AUDIO
AUDIO
B_BIOS
DDR3_1
DDR3_2
BAT
F_PANEL
ATX_12V_2X4
Intel®B85
R_USB30
CODEC
CLR_CMOS
M_BIOS
HDMI COAXIAL
USB_LAN
PCIEX16
PCI1
PCI2
PCIEX4
F_USB1
F_USB2
PCIe to PCI
Bridge
Intel®
GbE LAN
LPT
iTE® Super I/O
DDR3_3 DDR3_4
SPDIF_O
SATA3
1 0
3 2
COMA
PCIEX1_1
PCIEX1_2
SYS_FAN3
F_USB30
SYS_FAN2
SYS_FAN1
SATA2
5 4
R_USB
TI Burr Brown®
OPA2134

- 5 -
G1.Sniper B5 Motherboard Block Diagram
PS/2 KB/Mouse
LGA1150
CPU
DMI 2.0 FDI
CPU CLK+/- (100 MHz)
Dual BIOS
DDR3 1600/1333 MHz
COM
LPC Bus
Intel®B85
iTE®
Super
I/O
PCIe CLK
(100 MHz)
PCIe CLK
(100 MHz)
PCI Express Bus
1 PCI Express x16
x1
LAN
RJ45
Intel®
GbE LAN
2 PCI
PCI Bus
PCI CLK
(33 MHz)
PCIe to PCI
Bridge
x1
x1
2 PCI Express x1
x4
1 PCI Express x4
PCI Express Bus
x16
2 SATA 3Gb/s
HDMI
8 USB 2.0/1.1
4 USB 3.0/2.0
For detailed product information/limitation(s), refer to "1-2 Product Specications."
Center/Subwoofer Speaker Out
Line Out
MIC
Line In
S/PDIF Out
Side Speaker Out
Rear Speaker Out
CODEC
LPT
4 SATA 6Gb/s
x1
Dual Channel Memory

- 6 -
Chapter 1 Hardware Installation
1-1 Installation Precautions
The motherboard contains numerous delicate electronic circuits and components which can become
damaged as a result of electrostatic discharge (ESD). Prior to installation, carefully read the user's
manual and follow these procedures:
•Prior to installation, make sure the chassis is suitable for the motherboard.
•Prior to installation, do not remove or break motherboard S/N (Serial Number) sticker or
warranty sticker provided by your dealer. These stickers are required for warranty validation.
•Always remove the AC power by unplugging the power cord from the power outlet before
installing or removing the motherboard or other hardware components.
•When connecting hardware components to the internal connectors on the motherboard, make
sure they are connected tightly and securely.
•When handling the motherboard, avoid touching any metal leads or connectors.
•It is best to wear an electrostatic discharge (ESD) wrist strap when handling electronic com-
ponents such as a motherboard, CPU or memory. If you do not have an ESD wrist strap, keep
your hands dry and rst touch a metal object to eliminate static electricity.
•Prior to installing the motherboard, please have it on top of an antistatic pad or within an
electrostatic shielding container.
•Before unplugging the power supply cable from the motherboard, make sure the power supply
has been turned off.
•Before turning on the power, make sure the power supply voltage has been set according to
the local voltage standard.
•Before using the product, please verify that all cables and power connectors of your hardware
components are connected.
•To prevent damage to the motherboard, do not allow screws to come in contact with the
motherboard circuit or its components.
•Make sure there are no leftover screws or metal components placed on the motherboard or
within the computer casing.
•Do not place the computer system on an uneven surface.
•Do not place the computer system in a high-temperature environment.
•Turning on the computer power during the installation process can lead to damage to system
components as well as physical harm to the user.
•If you are uncertain about any installation steps or have a problem related to the use of the
product, please consult a certied computer technician.

- 7 -
1-2 ProductSpecications
CPU Support for Intel®Core™i7 processors/Intel®Core™i5 processors/
Intel®Core™i3 processors/Intel®Pentium®processors/Intel®Celeron®processors
in the LGA1150 package
(Go to GIGABYTE's website for the latest CPU support list.)
L3 cache varies with CPU
Chipset Intel®B85 Express Chipset
Memory 4 x DDR3 DIMM sockets supporting up to 32 GB of system memory
* Due to a Windows 32-bit operating system limitation, when more than 4 GB of physical
memory is installed, the actual memory size displayed will be less than the size of
the physical memory installed.
Dual channel memory architecture
Support for DDR3 1600/1333 MHz memory modules
Support for non-ECC memory modules
Support for Extreme Memory Prole (XMP) memory modules
(Go to GIGABYTE's website for the latest supported memory speeds and memory
modules.)
Onboard
Graphics
Integrated Graphics Processor:
- 1 x HDMI port, supporting a maximum resolution of 4096x2160
* Support for HDMI 1.4a version.
- Maximum shared memory of 1 GB
Audio Realtek®ALC898 codec
TI Burr Brown® OPA2134 operational amplier
High Denition Audio
2/4/5.1/7.1-channel
Support for S/PDIF Out
LAN Intel®GbE LAN chip (10/100/1000 Mbit)
Expansion Slots 1 x PCI Express x16 slot, running at x16
(The PCI Express x16 slot conforms to PCI Express 3.0 standard.)
* For optimum performance, if only one PCI Express graphics card is to be installed,
be sure to install it in the PCIEX16 slot.
1 x PCI Express x16 slot, running at x4 (PCIEX4)
2 x PCI Express x1 slots
(The PCIEX4 and PCIEX1 slots conform to PCI Express 2.0 standard.)
2 x PCI slots
Multi-Graphics
Technology Support for AMD CrossFire™technology
Storage Interface Chipset:
- 4 x SATA 6Gb/s connectors (SATA3 0~SATA3 3)
- 2 x SATA 3Gb/s connectors (SATA2 4~SATA2 5)
USB Chipset:
- 4 x USB 3.0/2.0 ports (2 ports on the back panel, 2 ports available through
the internal USB header)
- 8 x USB 2.0/1.1 ports (4 ports on the back panel, 4 ports available through
the internal USB headers)

- 8 -
Internal
Connectors
1 x 24-pin ATX main power connector
1 x 8-pin ATX 12V power connector
4 x SATA 6Gb/s connectors
2 x SATA 3Gb/s connectors
1 x CPU fan header
3 x system fan headers
1 x front panel header
1 x front panel audio header
1 x S/PDIF Out header
1 x USB 3.0/2.0 header
2 x USB 2.0/1.1 headers
1 x serial port header
1 x parallel port header
1 x Clear CMOS jumper
Back Panel
Connectors
1 x PS/2 keyboard port
1 x PS/2 mouse port
1 x coaxial S/PDIF Out connector
1 x HDMI port
2 x USB 3.0/2.0 ports
4 x USB 2.0/1.1 ports
1 x RJ-45 port
1 x optical S/PDIF Out connector
5 x audio jacks (Center/Subwoofer Speaker Out, Rear Speaker Out, Line In,
Line Out, Mic In)
I/O Controller iTE®I/O Controller Chip
Hardware
Monitor
System voltage detection
CPU/System temperature detection
CPU/System fan speed detection
CPU/System overheating warning
CPU/System fan fail warning
CPU/System fan speed control
* Whether the fan speed control function is supported will depend on the cooler you
install.
BIOS 2 x 128 Mbit ash
Use of licensed AMI UEFI BIOS
Support for DualBIOS™
PnP 1.0a, DMI 2.7, SM BIOS 2.7, ACPI 2.0
Unique Features Support for Q-Flash
Support for Xpress Install
Support for APP Center
* Available applications in APP Center may differ by motherboard model. Supported
functions of each application may also differ depending on motherboard
specications.
- @BIOS
- EasyTune
- EZ Setup
- USB Blocker
Support for ON/OFF Charge

- 9 -
Bundled
Software
Norton®Internet Security (OEM version)
Intel®Rapid Start Technology
Intel®Smart Connect Technology
Intel®Small Business Advantage
cFosSpeed
Operating
System Support for Windows 8.1/8/7
Form Factor ATX Form Factor; 30.5cm x 22.5cm
* GIGABYTE reserves the right to make any changes to the product specications and product-related information without
prior notice.
* Please visit the Support & Downloads\Utility page on GIGABYTE's website to check the supported operating system(s)
for the software listed in the "Unique Features" and "Bundled Software" columns.
1-3 Installing the CPU
Read the following guidelines before you begin to install the CPU:
•Make sure that the motherboard supports the CPU.
(Go to GIGABYTE's website for the latest CPU support list.)
•Always turn off the computer and unplug the power cord from the power outlet before installing the
CPU to prevent hardware damage.
•Locate the pin one of the CPU. The CPU cannot be inserted if oriented incorrectly. (Or you may
locate the notches on both sides of the CPU and alignment keys on the CPU socket.)
•Apply an even and thin layer of thermal grease on the surface of the CPU.
•Do not turn on the computer if the CPU cooler is not installed, otherwise overheating and damage
of the CPU may occur.
•Set the CPU host frequency in accordance with the CPU specications. It is not recommended
that the system bus frequency be set beyond hardware specications since it does not meet the
standard requirements for the peripherals. If you wish to set the frequency beyond the standard
specications, please do so according to your hardware specications including the CPU, graphics
card, memory, hard drive, etc.
Installing the CPU
Locate the alignment keys on the motherboard CPU socket and the notches on the CPU.
Alignment KeyAlignment Key
LGA1150 CPU Socket
Pin One Corner of the CPU Socket
Notch
Notch
LGA1150 CPU
Triangle Pin One Marking on the CPU
Do not remove the CPU socket cover before inserting the CPU. It may pop off from the load plate
automatically during the process of re-engaging the lever after you insert the CPU.

- 10 -
DualChannelMemoryConguration
This motherboard provides four DDR3 memory sockets and supports Dual Channel Technology. After the
memory is installed, the BIOS will automatically detect the specications and capacity of the memory. Enabling
Dual Channel memory mode will double the original memory bandwidth.
The four DDR3 memory sockets are divided into two channels and each channel has two memory sockets as
following:
Channel A: DDR3_2, DDR3_4
Channel B: DDR3_1, DDR3_3
Due to CPU limitations, read the following guidelines before installing the memory in Dual Channel mode.
1. Dual Channel mode cannot be enabled if only one DDR3 memory module is installed.
2. When enabling Dual Channel mode with two or four memory modules, it is recommended that memory
of the same capacity, brand, speed, and chips be used and installed in the same colored DDR3
sockets. For optimum performance, when enabling Dual Channel mode with two memory modules,
we recommend that you install them in the DDR3_1 and DDR3_2 sockets.
1-5 Installing an Expansion Card
Read the following guidelines before you begin to install an expansion card:
•Make sure the motherboard supports the expansion card. Carefully read the manual that came
with your expansion card.
•Always turn off the computer and unplug the power cord from the power outlet before installing an
expansion card to prevent hardware damage.
1-6 Back Panel Connectors
PS/2 Keyboard and PS/2 Mouse Port
Use the upper port (green) to connect a PS/2 mouse and the lower port (purple) to connect a PS/2 keyboard.
Coaxial S/PDIF Out Connector
This connector provides digital audio out to an external audio system that supports digital coaxial audio.
Before using this feature, ensure that your audio system provides a coaxial digital audio in connector.
1-4 Installing the Memory
Read the following guidelines before you begin to install the memory:
•Make sure that the motherboard supports the memory. It is recommended that memory of the
same capacity, brand, speed, and chips be used.
(Go to GIGABYTE's website for the latest supported memory speeds and memory modules.)
•Always turn off the computer and unplug the power cord from the power outlet before installing the
memory to prevent hardware damage.
•Memory modules have a foolproof design. A memory module can be installed in only one direction.
If you are unable to insert the memory, switch the direction.

- 11 -
HDMI Port
The HDMI port is HDCP compliant and supports Dolby True HD and DTS HD
Master Audio formats. It also supports up to 192KHz/24bit 8-channel LPCM
audio output. You can use this port to connect your HDMI-supported monitor.
The maximum supported resolution is 4096x2160, but the actual resolutions supported are dependent
on the monitor being used.
USB 2.0/1.1 Port
The USB port supports the USB 2.0/1.1 specication. Use this port for USB devices such as a USB
keyboard/mouse, USB printer, USB ash drive and etc.
USB 3.0/2.0 Port
The USB 3.0 port supports the USB 3.0 specication and is compatible to the USB 2.0/1.1 specication.
Use this port for USB devices such as a USB keyboard/mouse, USB printer, USB ash drive and etc.
•When removing the cable connected to a back panel connector, rst remove the cable from your
device and then remove it from the motherboard.
•When removing the cable, pull it straight out from the connector. Do not rock it side to side to prevent
an electrical short inside the cable connector.
The audio jacks can be recongure to perform different functions via the audio software (supported
functions may vary based on hardware specication). Only microphones still MUST be connected
to the default Mic in jack.
RJ-45 LAN Port
The Gigabit Ethernet LAN port provides Internet connection at up to 1 Gbps data rate. The following
describes the states of the LAN port LEDs.
Center/Subwoofer Speaker Out Jack
Use this audio jack to connect center/subwoofer speakers in a 5.1/7.1-channel audio conguration.
Rear Speaker Out Jack
This jack can be used to connect front speakers in a 4/5.1/7.1-channel audio conguration.
Optical S/PDIF Out Connector
This connector provides digital audio out to an external audio system that supports digital optical audio.
Before using this feature, ensure that your audio system provides an optical digital audio in connector.
Line In Jack
The line in jack. Use this audio jack for line in devices such as an optical drive, walkman, etc.
Line Out Jack
The line out jack. Use this audio jack for a headphone or 2-channel speaker. This jack can be used to
connect front speakers in a 4/5.1/7.1-channel audio conguration.
Mic In Jack
The Mic in jack. Microphones must be connected to this jack.
Activity LED
Connection/
Speed LED
LAN Port
Activity LED:
Connection/Speed LED:
State Description
Orange 1 Gbps data rate
Green 100 Mbps data rate
Off 10 Mbps data rate
State Description
Blinking Data transmission or receiving is occurring
On No data transmission or receiving is occurring

- 12 -
1-7 ChangingtheOperationalAmplier
Step 1:
Use an IC extractor to carefully grip the IC's sides and extract it from
the socket.
Step 2:
Align the notch on your OP chip with the notch on the socket and
gently press the chip into the socket until seated.
For purchasing the IC extractor and OP Chip, please contact the local dealer.

- 13 -
1-8 Internal Connectors
Read the following guidelines before connecting external devices:
•First make sure your devices are compliant with the connectors you wish to connect.
•Before installing the devices, be sure to turn off the devices and your computer. Unplug the power
cord from the power outlet to prevent damage to the devices.
•After installing the device and before turning on the computer, make sure the device cable has
been securely attached to the connector on the motherboard.
1) ATX_12V_2X4
2) ATX
3) CPU_FAN
4) SYS_FAN1/2/3
5) SATA3 0/1/2/3
6) SATA2 4/5
7) F_PANEL
8) F_AUDIO
9) SPDIF_O
10) CLR_CMOS
11) F_USB30
12) F_USB1/F_USB2
13) COMA
14) LPT
15) BAT
1
2
3
714
4
12109
5
11
4
138
15
6

- 14 -
1/2) ATX_12V_2X4/ATX (2x4 12V Power Connector and 2x12 Main 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, rst make sure the power supply is turned
off and all devices are properly installed. The power connector possesses a foolproof design. Connect the
power supply cable to the power connector in the correct orientation.
The 12V power connector mainly supplies power to the CPU. If the 12V power connector is not connected,
the computer will not start.
To meet expansion requirements, it is recommended that a power supply that can withstand high power consump-
tion be used (500W or greater). If a power supply is used that does not provide the required power, the result can
lead to an unstable or unbootable system.
ATX_12V_2X4:
Pin No. Denition Pin No. Denition
1GND (Only for 2x4-pin
12V)
5 +12V (Only for 2x4-pin 12V)
2GND (Only for 2x4-pin
12V)
6 +12V (Only for 2x4-pin 12V)
3 GND 7 +12V
4 GND 8 +12V
DEBUG
PORT
G.QBOFM
131
2412
ATX
ATX:
Pin No. Denition Pin No. Denition
1 3.3V 13 3.3V
2 3.3V 14 -12V
3 GND 15 GND
4 +5V 16 PS_ON (soft On/Off)
5 GND 17 GND
6 +5V 18 GND
7 GND 19 GND
8 Power Good 20 -5V
9 5VSB (stand by +5V) 21 +5V
10 +12V 22 +5V
11 +12V (Only for 2x12-pin
ATX)
23 +5V (Only for 2x12-pin ATX)
12 3.3V (Only for 2x12-pin
ATX)
24 GND (Only for 2x12-pin
ATX)
DEBUG
PORT
G.QBOFM
ATX_12V_2X4
5 8
1 4
3/4) CPU_FAN/SYS_FAN1/2/3 (Fan Headers)
All fan headers on this motherboard are 4-pin. Most fan headers possess a foolproof insertion design.
When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is
the ground wire). The speed control function requires the use of a fan with fan speed control design. For
optimum heat dissipation, it is recommended that a system fan be installed inside the chassis.
CPU_FAN SYS_FAN3
DEBUG PORT
G.QBOFM
1
DEBUG PORT
G.QBOFM
1
CPU_FAN:
Pin No. Denition
1 GND
2 +12V
3 Sense
4 Speed Control
•Be sure to connect fan cables to the fan headers to prevent your CPU and system from overheating. Overheat-
ing may result in damage to the CPU or the system may hang.
•These fan headers are not conguration jumper blocks. Do not place a jumper cap on the headers.
DEBUG PORT
G.QBOFM
1
SYS_FAN1/2
SYS_FAN1/2/3:
Pin No. Denition
1 GND
2 +12V/Speed Control
3 Sense
4 VCC

- 15 -
5) SATA3 0/1/2/3 (SATA 6Gb/s Connectors)
The SATA connectors conform to SATA 6Gb/s standard and are compatible with SATA 3Gb/s and SATA
1.5Gb/s standard. Each SATA connector supports a single SATA device.
Pin No. Denition Pin No. Denition
1 GND 5 RXN
2 TXP 6 RXP
3 TXN 7 GND
4 GND
7) F_PANEL (Front Panel Header)
Connect the power switch, reset switch, speaker, 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.
•PW (Power Switch, Red):
Connects to the power switch on the chassis front panel. You may
congure the way to turn off your system using the power switch
(refer to Chapter 2, "BIOS Setup," "Power Management," for more
information).
•SPEAK (Speaker, Orange):
Connects to the speaker on the chassis front panel. The system reports
system startup status by issuing a beep code. One single short beep
will be heard if no problem is detected at system startup.
•PLED/PWR (Power LED, Yellow/Purple):
System Status LED
S0 On
S3/S4/S5 Off
Connects to the power status indicator
on the chassis front panel. The LED is on
when the system is operating. The LED is
off when the system is in S3/S4 sleep state
or powered off (S5).
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 assignments are matched correctly.
SATA3
1 0
3 2
7
DEBUG
PORT
G.QBOFM
DEBUG
PORT
G.QBOFM
7
1
DEBUG
PORT
G.QBOFM
DEBUG
PORT
G.QBOFM
1
Power LED
DEBUG
PORT
G.QBOFM
1
2
19
20
CI-
CI+
PWR_LED-
PWR_LED+
PLED- PW- SPEAK+ SPEAK-
PLED+ PW+
Power LED
HD-
RES+
HD+
RES-
Hard Drive
Activity LED
Reset
Switch Chassis Intrusion
Header
Power Switch Speaker
PWR_LED-
6) SATA2 4/5 (SATA 3Gb/s Connectors)
The SATA connectors conform to SATA 3Gb/s standard and are compatible with SATA 1.5Gb/s standard.
Each SATA connector supports a single SATA device.
Pin No. Denition Pin No. Denition
1 GND 5 RXN
2 TXP 6 RXP
3 TXN 7 GND
4 GND
SATA2
5 4
7
DEBUG
PORT
G.QBOFM
DEBUG
PORT
G.QBOFM
1
•HD (Hard Drive Activity LED, Blue):
Connects to the hard drive activity LED on the chassis front panel. The LED is on when the hard drive is
reading or writing data.
•RES (Reset Switch, Green):
Connects to the reset switch on the chassis front panel. Press the reset switch to restart the computer if the
computer freezes and fails to perform a normal restart.
•CI (Chassis Intrusion Header, Gray):
Connects to the chassis intrusion switch/sensor on the chassis that can detect if the chassis cover has been
removed. This function requires a chassis with a chassis intrusion switch/sensor.
To enable hot-plugging for the SATA ports, refer to Chapter 2, "BIOS Setup," "Peripherals\SATA
Conguration," for more information.

- 16 -
8) F_AUDIO (Front Panel Audio Header)
The front panel audio header supports Intel High Denition audio (HD) and AC'97 audio. You may connect
your chassis front panel audio module to this header. Make sure the wire assignments of the module con-
nector match the pin assignments of the motherboard header. Incorrect connection between the module
connector and the motherboard header will make the device unable to work or even damage it.
For HD Front Panel Audio: For AC'97 Front Panel Audio:
Pin No. Denition
1 MIC2_L
2 GND
3 MIC2_R
4 -ACZ_DET
5 LINE2_R
6 GND
7 FAUDIO_JD
8 No Pin
9 LINE2_L
10 GND
Pin No. Denition
1 MIC
2 GND
3 MIC Power
4 NC
5 Line Out (R)
6 NC
7 NC
8 No Pin
9 Line Out (L)
10 NC
•The front panel audio header supports HD audio by default.
•Audio signals will be present on both of the front and back panel audio connections simultaneously.
•Some chassis provide a front panel audio module that has separated connectors on each wire instead of a
single plug. For information about connecting the front panel audio module that has different wire assignments,
please contact the chassis manufacturer.
F_USB30 F_U
B_ 
F_  F_  
 
_
B
BS_ 
B
SB_ 
B
_S

S_
_
B
_ U
_ 
B
 

 
S  
 
123
 
123
 
123
 
123
1
1
1
1
BSS
S
_S  
SSU 
 
1 2 3  
 S3 BSSS 
9 1
10 2
9) SPDIF_O (S/PDIF Out Header)
This header supports digital S/PDIF Out and connects a S/PDIF digital audio cable (provided by expansion
cards) for digital audio output from your motherboard to certain expansion cards like graphics cards and
sound cards. For example, some graphics cards may require you to use a S/PDIF digital audio cable for
digital audio output from your motherboard to your graphics card if you wish to connect an HDMI display
to the graphics card and have digital audio output from the HDMI display at the same time.
For information about connecting the S/PDIF digital audio cable, carefully read the manual for your expan-
sion card.
Pin No. Denition
1 SPDIFO
2 GND
1
10) CLR_CMOS (Clear CMOS Jumper)
Use this jumper to clear the BIOS conguration and reset the CMOS values to factory defaults. To clear
the CMOS values, use a metal object like a screwdriver to touch the two pins for a few seconds.
•Always turn off your computer and unplug the power cord from the power outlet before clearing the CMOS values.
•After system restart, go to BIOS Setup to load factory defaults (select Load Optimized Defaults) or manually
congure the BIOS settings (refer to Chapter 2, "BIOS Setup," for BIOS congurations).
Open: Normal
Short: Clear CMOS Values

- 17 -
12) F_USB1/F_USB2 (USB 2.0/1.1 Headers)
These headers conform to USB 2.0/1.1 specication. Each USB header can provide two USB ports via an
optional USB bracket. For purchasing the optional USB bracket, please contact the local dealer.
Pin No. Denition Pin No. Denition
1 Power (5V) 6 USB DY+
2 Power (5V) 7 GND
3 USB DX- 8 GND
4 USB DY- 9 No Pin
5 USB DX+ 10 NC
•Do not plug the IEEE 1394 bracket (2x5-pin) cable into the USB header.
•Prior to installing the USB bracket, be sure to turn off your computer and unplug the power cord from the power
outlet to prevent damage to the USB bracket.
DEBUG
PORT
G.QBOFM
10
9
2
1
11) F_USB30 (USB 3.0/2.0 Header)
The header conforms to USB 3.0/2.0 specication and can provide two USB ports. For purchasing the
optional 3.5" front panel that provides two USB 3.0/2.0 ports, please contact the local dealer.
F_USB30 F_U
B_ 
F_  F_  
  _ B
BS_  B
SB_  B
_S  S_ _ B _ U _  B
  
 
S  
 
123
 
123
 
123
 
123
1
1
1
1
BSS
S
_S  
SSU 
 
1 2 3  
 S3 BSSS 
10
11
20 1
13) COMA (Serial Port Header)
The COM header can provide one serial port via an optional COM port cable. For purchasing the optional
COM port cable, please contact the local dealer.
Pin No. Denition Pin No. Denition
1 NDCD- 6 NDSR-
2 NSIN 7 NRTS-
3 NSOUT 8 NCTS-
4 NDTR- 9 NRI-
5 GND 10 No Pin
10
9
2
1
Pin No. Denition Pin No. Denition Pin No. Denition
1VBUS 8D1- 15 SSTX2-
2SSRX1- 9D1+ 16 GND
3SSRX1+ 10 NC 17 SSRX2+
4GND 11 D2+ 18 SSRX2-
5SSTX1- 12 D2- 19 VBUS
6SSTX1+ 13 GND 20 No Pin
7GND 14 SSTX2+

- 18 -
14) LPT (Parallel Port Header)
The LPT header can provide one parallel port via an optional LPT port cable. For purchasing the optional
LPT port cable, please contact the local dealer.
15) BAT (Battery)
The battery provides power to keep the values (such as BIOS congurations, date, and time information)
in the CMOS when the computer is turned off. Replace the battery when the battery voltage drops to a low
level, or the CMOS values may not be accurate or may be lost.
You may clear the CMOS values by removing the battery:
1. Turn off your computer and unplug the power cord.
2. Gently remove the battery from the battery holder and wait for one minute. (Or use a metal
object like a screwdriver to touch the positive and negative terminals of the battery holder,
making them short for 5 seconds.)
3. Replace the battery.
4. Plug in the power cord and restart your computer.
•Always turn off your computer and unplug the power cord before replacing the battery.
•Replace the battery with an equivalent one. Danger of explosion if the battery is replaced with an incorrect model.
•Contact the place of purchase or local dealer if you are not able to replace the battery by yourself or uncertain
about the battery model.
•When installing the battery, note the orientation of the positive side (+) and the negative side (-) of the battery
(the positive side should face up).
•Used batteries must be handled in accordance with local environmental regulations.
1
2
25
26
DEBUG
PORT
G.QBOFM
Pin No. Denition Pin No. Denition Pin No. Denition
1STB- 10 GND 19 ACK-
2AFD- 11 PD4 20 GND
3PD0 12 GND 21 BUSY
4ERR- 13 PD5 22 GND
5PD1 14 GND 23 PE
6INIT- 15 PD6 24 No Pin
7PD2 16 GND 25 SLCT
8SLIN- 17 PD7 26 GND
9PD3 18 GND

- 19 -
Chapter 2 BIOS Setup
•Because BIOS ashing is potentially risky, if you do not encounter problems using the current version of BIOS,
it is recommended that you not ash the BIOS. To ash the BIOS, do it with caution. Inadequate BIOS ashing
may result in system malfunction.
•It is recommended that you not alter the default settings (unless you need to) to prevent system instability or other
unexpected results. Inadequately altering the settings may result in system's failure to boot. If this occurs, try to
clear the CMOS values and reset the board to default values. (Refer to the "Load Optimized Defaults" section in
this chapter or introductions of the battery/clear CMOS jumper in Chapter 1 for how to clear the CMOS values.)
BIOS (Basic Input and Output System) records hardware parameters of the system in the CMOS on the moth-
erboard. Its major functions include conducting the Power-On Self-Test (POST) during system startup, saving
system parameters and loading operating system, etc. BIOS includes a BIOS Setup program that allows the
user to modify basic system conguration settings or to activate certain system features.
When the power is turned off, the battery on the motherboard supplies the necessary power to the CMOS to
keep the conguration values in the CMOS.
To access the BIOS Setup program, press the <Delete> key during the POST when the power is turned on.
To upgrade the BIOS, use either the GIGABYTE Q-Flash or @BIOS utility.
•Q-Flash allows the user to quickly and easily upgrade or back up BIOS without entering the operating system.
•@BIOS is a Windows-based utility that searches and downloads the latest version of BIOS from the Internet
and updates the BIOS.
2-1 Startup Screen
The following startup Logo screen will appear when the computer boots.
(Sample BIOS Version: F7)
•When the system is not stable as usual, select the Load Optimized Defaults item to set your system to its defaults.
•The BIOS Setup menus described in this chapter are for reference only and may differ by BIOS version.
Function Keys
The ST Mode provides a fancy and user-friendly BIOS environment where users can easily point and click
through various settings and make adjustments for optimum performance. In ST Mode, you can use your mouse
to move through the option menus for quick conguration or you can click Classic Setup under the Shortcuts
list on the right of the screen or press <F2> to switch to the traditional BIOS Setup screen. On the main menu
of the BIOS Setup program, press arrow keys to move among the items and press <Enter> to accept or enter
a sub-menu. Or you can use your mouse to select the item you want.

- 20 -
2-2 M.I.T.
Whether the system will work stably with the overclock/overvoltage settings you made is dependent on your overall
system congurations. Incorrectly doing overclock/overvoltage may result in damage to CPU, chipset, or memory
and reduce the useful life of these components. This page is for advanced users only and we recommend you not to
alter the default settings to prevent system instability or other unexpected results. (Inadequately altering the settings
may result in system's failure to boot. If this occurs, clear the CMOS values and reset the board to default values.)
This section provides information on the BIOS version, CPU base clock, CPU frequency, memory frequency,
total memory size, CPU temperature and Vcore.
`M.I.T. Current Status
This screen provides information on CPU/memory frequencies/parameters.
`Advanced Frequency Settings
&Processor Graphics Clock
Allows you to set the onboard graphics clock. The adjustable range is from 400 MHz to 4000 MHz. (Default:
Auto)
&CPU Upgrade (Note)
Allows you to set the CPU frequency. Options may vary depending on the CPU being used. (Default: Auto)
&CPU Clock Ratio
Allows you to alter the clock ratio for the installed CPU. The adjustable range is dependent on the CPU
being installed.
&CPU Frequency
Displays the current operating CPU frequency.
`Advanced CPU Core Features
&CPU Clock Ratio, CPU Frequency
The settings above are synchronous to those under the same items on the Advanced Frequency Settings
menu.
(Note) This item is present only when you install a CPU that supports this feature. For more information about
Intel®CPUs' unique features, please visit Intel's website.