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Источник

GA-EP31-DS3L

LGA775 socket motherboard for Intel® Core
Intel® Pentium® processor family/Intel® Celeron® processor family

User’s Manual

Rev. 2001
12ME-EP31DS3L-2001R

processor family/

Aug. 4, 2008

GA-EP31-DS3L

Motherboard

Aug. 4, 2008

GA-EP31-DS3L

Motherboard

© 2008 GIGA-BYTE TECHNOLOGY CO., LTD. All rights reserved.
The trademarks mentioned in this manual are legally registered to their respective owners.

The logo is exclusively licensed to GIGABYTE UNITED INC. by GIGA-BYTE
TECHNOLOGY CO., LTD.
GIGABYTE UNITED INC. is designated by GIGA-BYTE TECHNOLOGY CO., LTD as the exclu-

sive global distributor of GIGABYTE branded motherboards.

Disclaimer

Information in this manual is protected by copyright laws and is the property of GIGABYTE.
Changes to the specifications 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.

Documentation Classifications

In order to assist in the use of this product, GIGABYTE provides the following types of documentations:

 For detailed product information, carefully read the User’s Manual.
 For instructions on how to use GIGABYTE’s unique features, read or download the information

on/from the Support\Motherboard\Technology Guide page on our website.

For product-related information, check on our website at:
http://www.gigabyte.com.tw

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:

Table of Contents

Box Contents ………………………………………………………………………………………………….. 6

Optional Items………………………………………………………………………………………………….. 6

GA-EP31-DS3L Motherboard Layout …………………………………………………………………. 7

Block Diagram…………………………………………………………………………………………………. 8

Chapter 1 Hardware Installation ………………………………………………………………………… 9

1-1 Installation Precautions …………………………………………………………………………. 9

1-2 Product Specifications ………………………………………………………………………… 10

1-3 Installing the CPU and CPU Cooler …………………………………………………….. 13

1-3-1 Installing the CPU ……………………………………………………………………………………13

1-3-2 Installing the CPU Cooler ……………………………………………………………………….. 15

1- 4 Installing the Memory …………………………………………………………………………. 16

1-4-1 Dual Channel Memory Configuration ………………………………………………………. 16

1-4-2 Installing a Memory………………………………………………………………………………… 17

1- 5 Installing an Expansion Card ………………………………………………………………. 1 8

1- 6 Back Panel Connectors ……………………………………………………………………… 1 9

1- 7 Internal Connectors ……………………………………………………………………………. 21

Chapter 2 BIOS Setup……………………………………………………………………………………. 31

2-1 Startup Screen…………………………………………………………………………………… 32

2- 2 The Main Menu …………………………………………………………………………………. 3 3

2- 3 Standard CMOS Features ………………………………………………………………….. 3 5

2-4 Advanced BIOS Features……………………………………………………………………37

2-5 Integrated Peripherals …………………………………………………………………………. 39

2- 6 Power Management Setup ………………………………………………………………….. 42

2- 7 PnP/PCI Configurations……………………………………………………………………… 44

2- 8 PC Health Status ………………………………………………………………………………. 4 5

2- 9 MB Intelligent Tweaker(M.I.T.)…………………………………………………………….. 47

2-10 Load Fail-Safe Defaults……………………………………………………………………….. 50

2- 1 1 Load Optimized Defaults ……………………………………………………………………… 50

2-12 Set Supervisor/User Password…………………………………………………………… 51

2-13 Save & Exit Setup…………………………………………………………………………….. 52

2-14 Exit Without Saving …………………………………………………………………………… 52

— 4 —

Chapter 3 Drivers Installation ………………………………………………………………………….. 53

3- 1 Installing Chipset Drivers ……………………………………………………………………. 53

3- 2 Application Software …………………………………………………………………………… 54

3-3 Technical Manuals……………………………………………………………………………… 54

3-4 Contact…………………………………………………………………………………………….. 55

3-5 System…………………………………………………………………………………………….. 55

3- 6 Download Center……………………………………………………………………………….. 56

Chapter 4 Unique Features…………………………………………………………………………….. 57

4- 1 Xpress Recovery2 …………………………………………………………………………….. 57

4-2 BIOS Update Utilities…………………………………………………………………………. 62

4-2-1 Updating the BIOS with the Q-Flash Utility ……………………………………………… 62

4-2-2 Updating the BIOS with the @BIOS Utility ………………………………………………. 65

4- 3 EasyTune 5 Pro………………………………………………………………………………… 66

4-4 Dynamic Energy Saver Advanced ………………………………………………………. 67

Chapter 5 Appendix ………………………………………………………………………………………. 69

5-1 Configuring Audio Input and Output……………………………………………………….. 69

5-1-1 Configuring 2/4/5.1/7.1-Channel Audio …………………………………………………… 69

5-1-2 Installing the S/PDIF In Cable (Optional)………………………………………………….. 71

5-1-3 Configuring Microphone Recording …………………………………………………………. 73

5-1-4 Using the Sound Recorder ……………………………………………………………………… 75

5-2 Troubleshooting ………………………………………………………………………………….. 76

5-2-1 Frequently Asked Questions ………………………………………………………………….. 76

5-2-2 Troubleshooting Procedure …………………………………………………………………….. 77

Regulatory Statements ……………………………………………………………………………………. 79

— 5 —

Box Contents

GA-EP31-DS3L motherboard
Motherboard driver disk
User’s Manual
One IDE cable and one floppy disk drive cable
Two SATA 3Gb/s cables
I/O Shield

• The box contents above are for reference only and the actual items shall depend on product package you obtain.
The box contents are subject to change without notice.

• The motherboard image is for reference only.

Optional Items

2-port USB 2.0 bracket (Part No. 12CR1-1UB030-51R)
S/PDIF in cable (Part No. 12CR1-1SPDIN-01R)
2-port SATA power cable (Part No. 12CF1-2SERPW -01R)

— 6 —

GA-EP31-DS3L Motherboard Layout

COAXIAL

OPTICAL

KB_MS

LPT

COMA

USB

AUDIO

RTL8111C

CODEC

SPDIF_I

LAN

IT8718

ATX_12V

F_AUDIO

CD_IN

SPDIF_O

PCI1

PCI2

PCI3

SYS_FAN1

PCIEX16

PCIEX1_1

PCIEX1_2

FDD

LGA775

Intel® P31

PCIEX1_3

BAT

CPU_FAN

PHASE LED

GA-EP31-DS3L

DDR2_1

DDR2_2

Intel® ICH7

CLR_CMOS

SATA2_0

SATA2_2

SATA2_1

B_BIOS

M_BIOS

DDR2_3

SATA2_3

PWR_FAN

ATX

DDR2_4

SYS_FAN2

IDE

F_PANEL

— 7 —

F_USB1

F_USB2

PWR_LED

Block Diagram

PCIe CLK

(100 MHz)

LGA775

Processor

CPU CLK+/-

(333/266/200 MHz)

PCI Express Bus

3 PCI Express x1

PCIe CLK

(100 MHz)

1 PCI Express x16

PCI Express x16

PCI Bus

LAN

RJ45

RTL

8111C

Interface

Intel® P31

Intel® ICH7

CODEC

MIC

Line-Out

Host

Line-In

(333/266/200 MHz)

Dual BIOS

IT8718

SPDIF In

SPDIF Out

DDR2 1066/800/667 MHz

Dual Channel Memory

MCH CLK

ATA-100/66/33
IDE Channel

4 SATA 3Gb/s

8 USB Ports

Floppy

LPT Port
COM Port

PS/2 KB/Mouse

3 PCI

PCI CLK

(33 MHz)

Side Speaker Out

Surround Speaker Out

Center/Subwoofer Speaker Out

— 8 —

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, 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

components such as a motherboard, CPU or memory. If you do not have an ESD wrist strap,
keep your hands dry and first 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 certified computer technician.

Hardware Installation— 9 —

1- 2 Product Specifications

CPU  Support for an Intel® Core

Intel® Core

2 Quad processor/Intel® Core
Intel® Pentium® processor Extreme Edition/Intel® Pentium® D processor/
Intel® Pentium® 4 processor Extreme Edition/Intel® Pentium® 4 processor/
Intel® Celeron® processor in the LGA 775 package
(Go to GIGABYTE’s website for the latest CPU support list.)

 L2 cache varies with CPU
Front Side Bus  1333/1066/800 MHz FSB
Chipset  North Bridge: Intel® P31 Express Chipset

 South Bridge: Intel® ICH7
Memory  4 x 1.8V DDR2 DIMM sockets supporting up to 4 GB of system memory

 Dual channel memory architecture

 Support for DDR2 1066/800/667 MHz memory modules

(Go to GIGABYTE’s website for the latest memory support list.)

Audio  Realtek ALC888 codec

 High Definition Audio

 2/4/5.1/7.1-channel

 Support for S/PDIF In/Out

 Support for CD In

LAN  RTL 8111C chip (10/100/1000 Mbit)
Expansion Slots  1 x PCI Express x16 slot

 3 x PCI Express x1 slots

 3 x PCI slots

Storage Interface  South Bridge:

— 1 x IDE connector supporting ATA-100/66/33 and up to 2 IDE devices

— 4 x SATA 3Gb/s connectors supporting up to 4 SATA 3Gb/s devices

 iTE IT8718 chip:

— 1 x floppy disk drive connector supporting up to 1 floppy disk drive

USB  Integrated in the South Bridge

 Up to 8 USB 2.0/1.1 ports (4 on the back panel, 4 via the USB brackets

connected to the internal USB headers)

2 Extreme processor/

2 Duo processor/

(Note 1)

GA-EP31-DS3L Motherboard — 10 —

Internal Connectors  1 x 24-pin ATX main power connector

 1 x 4-pin ATX 12V power connector

 1 x floppy disk drive connector

 1 x IDE connector

 4 x SATA 3Gb/s connectors

 1 x CPU fan header

 2 x system fan headers

 1 x power fan header

 1 x front panel header

 1 x front panel audio header

 1 x CD In connector

 1 x S/PDIF In header

 1 x S/PDIF Out header

 2 x USB 2.0/1.1 headers

 1 x chassis intrusion header

 1 x power LED header

Back Panel  1 x PS/2 keyboard port
Connectors  1 x PS/2 mouse port

 1 x parallel port

 1 x serial port

 1 x coaxial S/PDIF Out connector

 1 x optical S/PDIF Out connector

 4 x USB 2.0/1.1 ports

 1 x RJ-45 port

 6 x audio jacks (Center/Subwoofer Speaker Out/Rear Speaker Out/

Side Speaker Out/Line In/Line Out/Microphone)
I/O Controller  iTE IT8718 chip
Hardware Monitor  System voltage detection

 CPU/System temperature detection
 CPU/System/Power fan speed detection
 CPU overheating warning
 CPU/System/Power fan fail warning
 CPU/System fan speed control

(Note 2)

BIOS  2 x 8 Mbit flash

 Use of licensed AWARD BIOS
 Support for DualBIOS

 PnP 1.0a, DMI 2.0, SM BIOS 2.4, ACPI 1.0b

Hardware Installation— 11 —

Unique Features  Support for @BIOS

 Support for Download Center
 Support for Q-Flash
 Support for EasyTune

(Note 3)

 Support for Xpress Install
 Support for Xpress Recovery2
 Support for Virtual Dual BIOS
 Support for Dynamic Energy Saver Advanced

Bundled Software  Norton Internet Security (OEM version)
Operating System  Support for Microsoft® Windows® Vista/XP
Form Factor  ATX Form Factor; 30.5cm x 21.0cm

(Note 4)

(Note 1) Based on 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,
4 GB of memory size will instead be shown as 3.xx GB during system startup.

(Note 2) Whether the CPU/system fan speed control function is supported will depend on the CPU/

system cooler you install.
(Note 3) Available functions in EasyTune may differ by motherboard model.
(Note 4) Due to the hardware limitation, you must install the Intel® Core

Core

2 Duo/ Pentium Dual-Core/ Celeron Dual-Core/ Celeron 400 Series CPU to enable

2 Extreme/ Core

2 Quad/

support for Dynamic Energy Saver.

GA-EP31-DS3L Motherboard — 12 —

1-3 Installing the CPU and CPU Cooler

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 specifications. It is not recommended that the system bus frequency be set beyond hardware specifications since it
does not meet the standard requirements for the peripherals. If you wish to set the frequency
beyond the standard specifications, please do so according to your hardware specifications
including the CPU, graphics card, memory, hard drive, etc.

1-3-1 Installing the CPU

A. Locate the alignment keys on the motherboard CPU socket and the notches on the CPU.

LGA775 CPU Socket

Alignment Key

Notch

Alignment Key

Pin One Corner of the CPU Socket

LGA 775 CPU

Notch

Triangle Pin One Marking on the CPU

Hardware Installation— 13 —

B. Follow the steps below to correctly install the CPU into the motherboard CPU socket.

Before installing the CPU, make sure to turn off the computer and unplug the power
cord from the power outlet to prevent damage to the CPU.

CPU Socket Lever

Step 1:
Completely raise the CPU socket lever.

Step 3:
Remove the protective socket cover from the
load plate. (To protect the CPU socket, always
replace the protective socket cover when the
CPU is not installed.)

Step 5:
Once the CPU is properly inserted, replace
the load plate and push the CPU socket lever
back into its locked position.

Step 2:
Lift the metal load plate from the CPU socket.
(DO NOT touch socket contacts.)

Step 4:
Hold the CPU with your thumb and index
fingers. Align the CPU pin one marking (triangle)
with the pin one corner of the CPU socket (or
you may align the CPU notches with the socket
alignment keys) and gently insert the CPU
into position.

GA-EP31-DS3L Motherboard — 14 —

1-3-2 Installing the CPU Cooler

Follow the steps below to correctly install the CPU cooler on the motherboard. (The following procedure
uses Intel® boxed cooler as the example cooler.)

Male

Direction of
the Arrow Sign
on the Male
Push Pin

Push Pin

The Top
of Female
Push Pin

Female
Push Pin

Step 1:
Apply an even and thin layer of thermal grease
on the surface of the installed CPU.

Step 3:
Place the cooler atop the CPU, aligning the
four push pins through the pin holes on the
motherboard. Push down on the push pins
diagonally.

Step 2:
Before installing the cooler, note the direction
of the arrow sign on the male push pin.
(Turning the push pin along the direction of
arrow is to remove the cooler, on the contrary,
is to install.)

Step 4:
You should hear a «click» when pushing down each
push pin. Check that the Male and Female push pins
are joined closely. (Refer to your CPU cooler installation manual for instructions on installing the cooler.)

Step 5:
After the installation, check the back of the
motherboard. If the push pin is inserted as the
picture above, the installation is complete.

Step 6:
Finally, attach the power connector of the CPU
cooler to the CPU fan header (CPU_FAN) on
the motherboard.

Use extreme care when removing the CPU cooler because the thermal grease/tape between
the CPU cooler and CPU may adhere to the CPU. Inadequately removing the CPU cooler may
damage the CPU.

Hardware Installation— 15 —

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 memory support list.)

• 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.

1-4-1 Dual Channel Memory Configuration

This motherboard provides four DDR2 memory sockets and supports Dual Channel
Technology. After the memory is installed, the BIOS will automatically detect the
specifications and capacity of the memory. Enabling Dual Channel memory mode
will double the original memory bandwidth.

The four DDR2 memory sockets are divided into two channels and each channel has two memory
sockets as following:

Channel 0: DDR2_1, DDR2_2
Channel 1: DDR2_3, DDR2_4

Dual Channel Memory Configurations T able

Two Modules

Four Modules

(SS=Single-Sided, DS=Double-Sided, «- -«=No Memory)

DDR2_1 DDR2_2 DDR2_3 DDR2_4
DS/SS — — DS/SS — DS/SS — — — — DS/SS

— — DS/SS DS/SS — —

— — DS/SS — — DS/SS
SS SS SS SS

DDR2_1

DDR2_2

DDR2_3

DDR2_4

Due to chipset limitation, read the following guidelines before installing the memory in Dual Channel mode.

1. Dual Channel mode cannot be enabled if only one DDR2 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 according to the
configurations in the first table for optimum performance.

3. Because of chipset limitations, do not populate both DIMM sockets of the same channel
(e.g. DDR2_1 and DDR2_2) with double-sided memory modules to prevent system’s failure to
start or incorrect detection of memory modules.

GA-EP31-DS3L Motherboard — 16 —

1-4-2 Installing a Memory

Before installing a memory module , make sure to turn off the computer and unplug
the power cord from the power outlet to prevent damage to the memory module.
DDR2 DIMMs are not compatible to DDR DIMMs. Be sure to install DDR2 DIMMs on
this motherboard.

Notch

DDR2 DIMM

A DDR2 memory module has a notch, so it can only fit in one direction. Follow the steps below to
correctly install your memory modules in the memory sockets.

Step 1:
Note the orientation of the memory module. Spread the retaining
clips at both ends of the memory socket. Place the memory
module on the socket. As indicated in the picture on the left,
place your fingers on the top edge of the memory, push down
on the memory and insert it vertically into the memory socket.

Step 2:
The clips at both ends of the socket will snap into place when
the memory module is securely inserted.

Hardware Installation— 17 —

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.

PCI Express x1 Slot

PCI Express x16 Slot

PCI Slot

Follow the steps below to correctly install your expansion card in the expansion slot.

1. Locate an expansion slot that supports your card. Remove the metal slot cover from the chassis back panel.

2. Align the card with the slot, and press down on the card until it is fully seated in the slot.

3. Make sure the metal contacts on the card are completely inserted into the slot.

4. Secure the card’s metal bracket to the chassis back panel with a screw.

5. After installing all expansion cards, replace the chassis cover(s).

6. Turn on your computer. If necessary, go to BIOS Setup to make any required BIOS changes for
your expansion card(s).

7. Install the driver provided with the expansion card in your operating system.

Example: Installing and Removing a PCI Express x16 Graphics Card:

• Installing a Graphics Card:
Gently insert the graphics card into the PCI Express x16 slot. Make sure the graphics card is
locked by the latch at the end of the PCI Express x16 slot.

• Removing the Card:
Press the white latch at the end of the PCI Express x16 slot to release the
card and then pull the card straight up from the slot.

GA-EP31-DS3L Motherboard — 18 —

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.

Parallel Port

Use the parallel port to connect devices such as a printer, scanner and etc. The parallel port is also
called a printer port.

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.

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.

Serial Port

Use the serial port to connect devices such as a mouse, modem or other peripherals.

USB Port

The USB port supports the USB 2.0/1.1 specification. Use this port for USB devices such as an
USB keyboard/mouse, USB printer, USB flash drive and etc.

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.

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

Activity LED:

State Description
Blinking Data transmission or receiving is occurring
Off No data transmission or receiving is occurring

• When removing the cable connected to a back panel connector, first 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.

Hardware Installation— 19 —

Center/Subwoofer Speaker Out Jack (Orange)

Use this audio jack to connect center/subwoofer speakers in a 5.1/7.1-channel audio configuration.

Rear Speaker Out Jack (Black)

Use this audio jack to connect rear speakers in a 4/5.1/7.1-channel audio configuration.

Side Speaker Out Jack (Gray)

Use this audio jack to connect side speakers in a 7.1-channel audio configuration.

Line In Jack (Blue)

The default line in jack. Use this audio jack for line in devices such as an optical drive, walkman,
etc.

Line Out Jack (Green)

The default 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 configuration.

Mic In Jack (Pink)

The default Mic in jack. Microphones must be connected to this jack.

In addition to the default speakers settings, the ~ audio jacks can be reconfigured to
perform different functions via the audio software. Only microphones still MUST be
connected to the default Mic in jack ( ). Refer to the instructions on setting up a 2/4/5.1/

7.1-channel audio configuration in Chapter 5, «Configuring 2/4/5.1/7.1-Channel Audio.»

GA-EP31-DS3L Motherboard — 20 —

1-7 Internal Connectors

1) ATX_12V

2) ATX

3) CPU_FAN

4) SYS_FAN1

5) SYS_FAN2

6) PWR_FAN

7) FDD

IDE

9) SATA2_0/1/2/3

10) PWR_LED

19
15

1617

10 12

9
5

11) F_AUDIO

12) F_PANEL

13) CD_IN

14) SPDIF_I

15) SPDIF_O

16) F_USB1/F_USB2

17) CI

18) CLR_CMOS

19) B AT

20) PHASE LED

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.

Hardware Installation— 21 —

1/2) ATX_12V/ATX (2×2 12V Power Connector and 2×12 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, first 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 consumption 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.

• The main power connector is compatible with power supplies with 2×10 power
connectors. When using a 2×12 power supply, remove the protective cover from the
main power connector on the motherboard. Do not insert the power supply cable into pins
under the protective cover when using a 2×10 power supply.

ATX_12V:

4
2

ATX_12V

Pin No. Definition

1 GND
2 GND
3 +12V
4 +12V

ATX

ATX:

131

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 2×12-pin A TX)
12 3.3V (Only for 2×12-pin A TX)

GA-EP31-DS3L Motherboard — 22 —

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 2×12-pin A TX)
24 GND (Only for 2×12-pin A TX)

3/4/5/6) CPU_FAN/SYS_FAN1/SYS_FAN2/PWR_FAN (Fan Headers)

The motherboard has a 4-pin CPU fan header (CPU_FAN), a 4-pin system fan header (SYS_FAN2),
a 3-pin system fan header (SYS_FAN1), and a 3-pin power fan header (PWR_FAN). 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 motherboard supports CPU
fan speed control, which requires the use of a CPU fan with fan speed control design. For optimum
heat dissipation, it is recommended that a system fan be installed inside the chassis.

CPU_FAN :

Pin No. Definition

CPU_FAN

SYS_FAN1

PWR_FAN

SYS_FAN2

• Be sure to connect fan cables to the fan headers to prevent your CPU and system from
overheating. Overheating may result in damage to the CPU or the system may hang.

• These fan headers are not configuration jumper blocks. Do not place a jumper cap on the
headers.

1 GND
2 +12V
3 Sense
4 Speed Control

SYS_FAN1 / PWR_FAN :

Pin No. Definition

1 GND
2 +12V
3 Sense

SYS_FAN2:

Pin No. Definition

1 GND
2 Speed Control
3 Sense
4 +5V

7) FDD (Floppy Disk Drive Connector)

This connector is used to connect a floppy disk drive. The types of floppy disk drives supported
are: 360 KB, 720 KB, 1.2 MB, 1.44 MB, and 2.88 MB. Before connecting a floppy disk drive, be
sure to locate pin 1 of the connector and the floppy disk drive cable. The pin 1 of the cable is
typically designated by a stripe of different color.

Hardware Installation— 23 —

IDE (IDE Connector)

The IDE connector supports up to two IDE devices such as hard drives and optical drives. Before
attaching the IDE cable, locate the foolproof groove on the connector. If you wish to connect two IDE
devices, remember to set the jumpers and the cabling according to the role of the IDE devices (for
example, master or slave). (For information about configuring master/slave settings for the IDE
devices, read the instructions from the device manufacturers.)

402

391

9) SATA2_0/1/2/3 (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.

SATA2_0

SATA2_1

GA-EP31-DS3L Motherboard — 24 —

Pin No. Definition

SATA2_2

SATA2_3

1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND

Please connect the L-shaped end
of the SATA 3Gb/s cable to your
SATA hard drive.

10) PWR_LED (System Power LED Header)

This header can be used to connect a system power LED on the chassis to indicate system power
status. The LED is on when the system is operating. The LED keeps blinking when the system is
in S1 sleep state. The LED is off when the system is in S3/S4 sleep state or powered off (S5).

Pin No. Definition

1 MPD+

2 MPD3 MPD-

System Status LED
S0 On
S1 Blinking
S3/S4/S5 Off

11) F_AUDIO (Front Panel Audio Header)

The front panel audio header supports Intel High Definition 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 connector 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.

Pin No. Definition

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

For AC’97 Front Panel Audio:For HD Front Panel Audio:

Pin No. Definition

1 MIC
2 GND
3 MIC Power
4NC
5 Line Out (R)
6NC
7NC
8 No Pin
9 Line Out (L)
10 NC

• The front panel audio header supports HD audio by default. If your chassis provides an
AC’97 front panel audio module, refer to the instructions on how to activate AC’97 functioninality
via the audio software in Chapter 5, «Configuring 2/4/5.1/7.1-Channel Audio.»

• Audio signals will be present on both of the front and back panel audio connections
simultaneously. If you want to mute the back panel audio (only supported when using an HD
front panel audio module), refer to Chapter 5, «Configuring 2/4/5.1/7.1-Channel Audio.»

• 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.

Hardware Installation— 25 —

12) F_PANEL (Front Panel Header)

Connect the power switch, reset switch, speaker and system status indicator on the chassis front
panel to this header according to the pin assignments below. Note the positive and negative pins
before connecting the cables.

Message/Power/

Sleep LED

2
1

MSG+

HD+

MSG-

HD-

Power
Switch

PW+

RES-

PW-

RES+

Speaker
Connector

SPEAK+

SPEAK-

20
19

IDE Hard Disk

Active LED

Reset
Switch

• MSG (Message/Power/Sleep LED, Yellow):

System Status LED
S0 On
S1 Blinking
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 keeps blinking when
the system is in S1 sleep state. The LED is off when the system is in
S3/S4 sleep state or powered off (S5).

• PW (Power Switch, Red):
Connects to the power switch on the chassis front panel. You may configure the way to turn off
your system using the power switch (refer to Chapter 2, «BIOS Setup,» «Power Management
Setup,» 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. If a problem is detected, the BIOS may issue beeps in different patterns to indicate the
problem. Refer to Chapter 5, «Troubleshooting,» for information about beep codes.

• HD (IDE 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.

• NC (Purple):
No connection

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.

GA-EP31-DS3L Motherboard — 26 —

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Manual

View the manual for the Gigabyte GA-P31-DS3L here, for free. This user manual comes under the category motherboards and has been rated by 2 people with an average of a 9.3. This manual is available in the following languages: English. Do you have a question about the Gigabyte GA-P31-DS3L?

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Frequently asked questions

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What is the width of the Gigabyte GA-P31-DS3L?

The Gigabyte GA-P31-DS3L has a width of 305 mm.

What is the depth of the Gigabyte GA-P31-DS3L?

The Gigabyte GA-P31-DS3L has a depth of 210 mm.

Is the manual of the Gigabyte GA-P31-DS3L available in English?

Yes, the manual of the Gigabyte GA-P31-DS3L is available in English .

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