Gigabyte GA-686LX2 User manual

Table of Table
1
TABLE OF CONTENTS
1. INTRODUCTION................................................................................1-1
1.1. PREFACE..........................................................................................................1-1
1.2. KEY FEATURES...............................................................................................1-1
1.3. PERFORMANCE LIST......................................................................................1-2
1.4. BLOCK DIAGRAM ............................................................................................1-3
1.5. INTRODUCE THE PentiumII Processor.......................................................1-4
1.6. WHAT IS AGP?.................................................. 1-6
2. SPECIFICATION ...............................................................................2-1
2.1. HARDWARE.....................................................................................................2-1
2.2. SOFTWARE......................................................................................................2-2
2.3. ENVIRONMENT................................................................................................2-2
3. HARDWARE INSTALLATION............................................................3-1
3.1. UNPACKING.....................................................................................................3-1
3.2. MAINBOARD LAYOUT.....................................................................................3-2
3.3. QUICK REFERENCE FOR JUMPERS & CONNECTORS .............................3-2
3.4. DRAM INSTALLATION.....................................................................................3-6
3.5. CPU SPEED SETUP ........................................................................................3-6
3.6. CMOS RTC & ISA CFG CMOS SRAM.............................................................3-7
3.7. SPEAKER CONNECTOR INSTALLATION .....................................................3-7
3.8. HARDWARE RESET SWITCH CONNECTOR INSTALLATION....................3-7
3.9. POWER LED CONNECTOR INSTALLATION ................................................3-7
3.10. IDE & ATAPI DEVICE INSTALLATION..........................................................3-7

686LX2
2
3.12. PERIPHERAL DEVICE INSTALLATION........................................................3-8
3.13. KEYBOARD & PS/2 MOUSE INSTALLATION..............................................3-8
3.14. KEYBOARD SETTING FUNCTION ...............................................................3-8
4. BIOS CONFIGURATION ...................................................................4-1
4.1. ENTERING SETUP ..........................................................................................4-1
4.2. CONTROL KEYS..............................................................................................4-1
4.3. GETTING HELP................................................................................................4-2
4.3.1. Main Menu ................................................ 4-2
4.3.2. Status Page Setup Menu / Option Page Setup Menu.............. 4-2
4.4. THE MAIN MENU..............................................................................................4-2
4.5. STANDARD CMOS SETUP MENU .................................................................4-4
4.6. BIOS FEATURES SETUP................................................................................4-8
4.7. CHIPSET FEATURES SETUP.........................................................................4-12
4.8. POWER MANAGEMENT SETUP....................................................................4-17
4.9. PNP/PCI CONFIGURATION............................................................................4-20
4.10. INTEGRATED PERIPHERALS ......................................................................4-22
4.11. LOAD SETUP DEFAULTS .............................................................................4-26
4.12. USER PASSWORD .......................................................................................4-27
4.13. IDE HDD AUTO DETECTION........................................................................4-28
4.14. SAVE & EXIT SETUP.....................................................................................4-29
4.15. EXIT WITHOUT SAVING...............................................................................4-30

Introduction
1-1
1. INTRODUCTION
1.1. PREFACE
Welcome to use the 686LX2 motherboard. The motherboard is a Dual
PentiumII Processor based PC / AT compatible system with AGP / PCI /
ISA Bus, and has been designed to be the fastest PC / AT system. There are
some new features allow you to operate the system with just the performance
you want.
This manual also explains how to install the motherboard for operation, and
how to set up your CMOS CONFIGURATION with BIOS SETUP program.
1.2. KEY FEATURES
qIntel Dual PentiumII Processor based PC / AT compatible mainboard.
qDual Slot 1 on board supports dual PentiumII processor running at 200-
633MHz.
qIntel 440LX chipset, Support AGP / SDRAM / Ultra DMA/33 IDE / ACPI
features.
qSupport CPU FAN Failure / Overheat Alarm & auto slow down CPU
speed.
qSupport PS/2 mouse & Keyboard Wake Up function.
qSupport Intel LDCMNetwork Manageability.
qSupport PCI Audio & Wake on Lan function.
qSupports 4xDIMMs using 3.3V EDO or SDRAM DIMM module.
qSupports 8 MB - 1 GB EDO / 512MB SDRAM memory on board.
qSupports ECC or Non-ECC type DRAM module.
q1xAGP slot, 5xPCI Bus slots, 2xISA Bus slots.
qSupports 2 channels Ultra DMA/33 IDE ports for 4 IDE Device.
qSupports 2xCOM (16550), 1xLPT (EPP / ECP), 1x1.44MB Floppy port.
qSupports 2xUSB ports, 1xPS/2 Mouse & 1xPS/2 Keyboard ports.
qLicensed AWARD BIOS, 2M bit FLASH RAM.

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1-2
qATX form factor, Double stack I/O connector, 4 layers PCB.
1.3. PERFORMANCE LIST
The following performance data list is the testing results of some popular
benchmark testing programs.
These data are just referred by users, and there is no responsibility for
different testing data values gotten by users. (The different Hardware &
Software configuration will result in different benchmark testing results.)
•CPU PentiumII processor
•DRAM 64 MB SDRAM
•CACHE SIZE 512 KB included in CPU
•DISPLAY Matrox Millennium II 4MB PCI VGA
•STORAGE Onboard IDE port
•O.S. Windows95 OSR2.0.
•DRIVER Display Driver at 1024 x 768 x 64K colors x 75Hz.
Triones Bus Master IDE Driver 3.60K
Processor Intel PentiumII
266MHz 300MHz
Winbench97 CPU mark32 695 781
Business Disk 2230 2234
Hi-End Disk 6110 6260
Business Graphic 129 140
Hi-End Graphic 55.4 61.2
Winstone 97 Business 62.8 65.2
Hi-End 31.1 33.2

Introduction
1-3
66MHz
8MHz
Floppy Port
3.3VEDO/SDRAM
DIMM Sockets
66MHz
1.4. BLOCK DIAGRAM
14.318MHz
IDE Bus
ISA Bus
AGP
SLOT
SLOT2
66MHz
PCI Bus
PCI Bus
66MHz
LPT Port
USB #2
PS/2 Keyboard
COM Ports
USB #1
DRAM Bus
PS/2 Mouse
USB Bus
SLOT 1
AGP Bus
Host Bus
PAC
82443LX
CHIPSET
I/O
83977TF
32.768KHz
24MHz
CLOCK
GEN
52C64-06
33MHz
14.318MHz
33MHz
14.318MHz
CLOCK
GEN
52C64-25
48MHz I/O
APIC
PIIX4
82371AB
CHIPSET
14.318MHz
33MHz
14.318MHz

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1-4
1.5. INTRODUCE THE Pentium

II Processor
Figure 1:Retention Mechanism & attach Mount
Figure 2:OEM PentiumII Processor

Introduction
1-5
Figure 3:Heatsink / FAN & Heat sink support for OEM PentiumII Processor
Figure 4:Boxed PentiumII Processor & Heat sink support

686LX2
1-6
1.6. WHAT IS AGP ?
The Accelerated Graphics Port (AGP) is a new port on the Host-To-PCI
bridge device that supports an AGP port. The main purpose of the AGP port
is to provide fast access to system memory.
The AGP port can be used either as fast PCI port (32-bits at 66MHz vs. 32-
bits at 33MHz) or as an AGP port which supports 2x data-rate, a read queue,
and side band addressing. When the 2x-data rate is used the port can
transmit data at 533Mb/sec (66.6*2*4). The read-queue can be used to
pipeline reads –removing the effects of the reads-latency. Side band
addressing can be used to transmit the data address on a separate line in
order to further speed the transaction.
.

Specification
2-1
2. SPECIFICATION
2.1. HARDWARE
•CPU −Dual PentiumII processor 200 –633 MHz.
−Dual 242 pins 66MHz slot1 on board.
•PROTECTION −PC Speaker Alarm when detect "CPU FAN Failure"
or “CPU Overheat”.
−Automatically slow down CPU speed when "CPU
FAN Failure" or "CPU Overheat".
−Intel LDCMsupport.
−H/W monitor power status (±5V, ±12V, CPU
voltage & CMOS battery voltage).
•SPEED −66 MHz system speed.
−66 MHz AGP bus speed. (133MHz 2*mode)
−33 MHz PCI-Bus speed.
−8 MHz AT bus speed.
•DRAM MEMORY −4 banks 168 pins DIMM module sockets on board.
−Use 8 / 16 / 32 / 64 / 128 / 256 MB 60~70 ns DIMM
module DRAM.
−8 M ~ 1 GB DRAM size.
−Support 3.3V SDRAM / EDO type DRAM.
−Support ECC or Non-ECC type DRAM.
•CACHE MEMORY −32 KB 1st cache memory included in CPU.
−256KB/512 KB 2nd cache in CPU.
−Support DIB speed mode for L2 Cache.
•I/O BUS SLOTS −1 66 / 133MHz AGP BUS.
−5 33MHz Master / Slave PCI-BUS.
−2 8MHz 16 bits ISA BUS.
•IDE PORTS −2 Ultra DMA/33 Bus Master IDE channels on
board.(Using IRQ14,15)
−Backward Support Mode 3,4 IDE & ATAPI CD -
ROM.

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2-2
•I/O PORTS −Supports 2 16550 COM ports. (Using IRQ4, 3)
−Supports 1 EPP/ECP LPT port. (Using IRQ7 or 5
and DMA3 or 1)
−Supports 1 1.44/2.88 MB Floppy port. (Using DMA2
& IRQ6)
−Supports 2 USB ports.
−Supports PS/2 Mouse. (Using IRQ12 )
−Supports PS/2 Keyboard. (Using IRQ1 )
•GREEN FUNCTION −Suspend mode support.
−Green switch & ACPI LED support..
−IDE & Display power down support.
−Monitor all IRQ / DMA / Display / I/O events.
•BIOS −2M Bit FLASH EEPROM.
−Supports Plug & Play, DMI, ACPI Function.
•DIMENSION −ATX Form Factor, 4 layers PCB.
2.2. SOFTWARE
•DRIVER −Intel LDCMoptional.
−Health monitor Utility.
−Bus Master IDE Driver.
−Suspend to HD utility.
•BIOS −Licensed AWARD BIOS.
−AT CMOS Setup, BIOS / Chipset Setup, Green
Setup, Hard Disk Utility included.
−Monitor Health status.
•O.S. −Operation with MS-DOS, Windows95,
WINDOWSNT, OS/2, NOVELL and SCO UNIX.
2.3. ENVIRONMENT
•Ambient Temp. −0°C to +50°C (Operating).
•Relative Hum. −0 to +85% (Operating).
•Altitude −0 to 10,000 feet (Operating).
•Vibration −0 to 1,000 Hz.
•Electricity −4.9 V to 5.2 V.
−Max. 20A current at 5V.