Gigabyte 686BX User manual

R-01-01-080319
686BX
USER'S MANUAL
1. System power on by PS/2 Mouse: First, enable this function
in CMOS Setup, then you can power on the system by double
clicking the right or left button of your PS/2 Mouse.
2. System power on by Keyboard: If your ATX power supply
supports larger than 720 mA 5V Stand-By current, you can
power on your system by entering password from the
keyboard after setting the “Keyboard power on”password in
CMOS Setup.
3. Supports 3 steps ACPI LED.
4. Modem Ring-On. (COM B)
5. Wake-Up on LAN. (on J13)
6. Supports LDCM®
Pentium

II Processor MAINBOARD
REV. 1.0 First Edition
Release Date 98.03.19

686BX
1
The author assumes no responsibility for any errors or omissions that may
appear in this document nor does it make a commitment to update the
information contained herein.
Third-party brands and names are the property of their respective owners.
March 19, 1998 Taipei, Taiwan

Quick Installation Guide
2
I. Quick Installation Guide :
CPU SPEED SETUP
The system bus speed is selectable between 66.6MHz and 100 MHz. The
user can select the system bus speed (JP6) and change the DIP SWITCH
(SW) selection to set up the CPU speed for 200 - 633MHz processor.
The CPU speed MUST match with the frequency RATIO. It will cause
system hanging up if the frequency RATIO is higher than that of CPU.
CLK RATIO SW 1 SW 2 SW 3 SW 4
X3 ON OFF ON ON
X3.5 OFF OFF ON ON
X4 ON ON OFF ON
X4.5 OFF ON OFF ON
X5 ON OFF OFF ON
X5.5 OFF OFF OFF ON
JP6
1-2 CLOSE : System Speed is set to 66 MHz
2-3 CLOSE : Reserved (For Future use only!)
1-2-3 OPEN : System Speed is set to 100MHz

686BX
3
I. Set system speed to 66MHz: JP6 pin 1-2 short will cause
system always run at 66 MHz FSB (Front Side Bus).
II. Set system speed to 100MHz: JP6 pin 1-2-3 open will cause
system always run at 100MHz FSB.
III. Function for future use: Please don’t short this pins right now!
1. PentiumII 300 / 100MHz FSB
JP6 1
PIIX4
82443BX
ON
43 2 1
JP6
JP6
3 2 1
JP6 3 2 1
JP6 3 2 1

Quick Installation Guide
4
2. PentiumII 350 / 100MHz FSB
3. PentiumII 400 / 100MHz FSB
4. PentiumII 450 / 100MHz FSB
5. PentiumII 233 MHz / 66MHz FSB
SW
ON
4 3 2 1
SW
4 3 2 1
SW
ON
4 3 2 1
ON
SW
ON
4 3 2 1
JP6
JP6
JP6
JP6
3 2 1
3 2 1
3 2 1
3 2 1

686BX
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6. PentiumII 266 / 66MHz FSB
7. PentiumII 300 MHz / 66MHz FSB
II. Jumper setting :
SPK : Speaker Connector
PIIX4
82443BX
JP6
1
SPK
1
PIN FUNCTION
1VCC
2NC
3NC
4Data
RST : Reset Switch
SW
ON
4 3 2 1
SW
ON
4 3 2
JP6
JP6
3 2 1
3 2 1

Quick Installation Guide
6
PIIX4
82443BX
JP6
RST Open: Normal Close: Reset System
PW LED : Power LED Connector
PIIX4
82443BX
JP6
Power LED
PIN FUNCTION
1LED (+)
2NC
3LED (-)
1
HD : IDE Hard Disk Active LED

686BX
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PIIX4
82443BX
JP6
PIN FUNCTION
1LED (+)
2LED (-)
1
HD LED
IR : Infrared Connector (Optional)
PIIX4
82443BX
JP6
PIN FUNCTION
1IR Data Output
2GND 1
IR Connector
3IR Data Input
4Signal
5POWER (+)
GN : Green Function Switch

Quick Installation Guide
8
PIIX4
82443BX
JP6
GN Open: Normal Close: Enter Green Mode
Soft POWER : Soft Power Connector
PIIX4
82443BX
JP6
Soft Power
POWER1 : Power Connector

686BX
9
PIIX4
82443BX
JP6
1
1
Power Good
Pin No.
3,5,7,13,
15-17
4,6,19,20
10
12
18
8
9
14
Function
GND
VCC(+5V)
+12V
-12V
-5V
5V SB
PS-ON
11
PS/2 Mouse / Keyboard Connector
PIIX4
82443BX
JP6
PS/2 Keyboard
PS/2 Mouse
J1 : CPU Cooling Fan Power Connector

Quick Installation Guide
10
PIIX4
82443BX
JP6
J1
PIN
FUNCTION
1
GND
2
+12V
3
SENSE
FAN Power
1
IDE1: For Primary IDE port
PIIX4
82443BX
JP6
1
1
1
1
1
RED LINE
IDE1
IDE2: For Secondary IDE port

686BX
11
PIIX4
82443BX
JP6
1
1
1
1
1
RED LINE
IDE2
J3 : FLOPPY PORT
PIIX4
82443BX
JP6
1
1
1
FLOPPY
1
RED LINE
LPT PORT / COM A / COM B

Quick Installation Guide
12
PIIX4
82443BX
JP6
COM B
LPT PORT
COM A
JP1 : Keyboard Power On Selection
PIIX4
82443BX
JP6
J1
Keyboard Power On
Default: Disable
1
2
3
1-2
2-3
Enable
Disable
JP1
CN1: USB Port

686BX
13
PIIX4
82443BX
JP6
JP1
J1
Pin No.
Function
1
2
3
4
5
6
7
8
USB D0-
USB D0+
GND
USB V0
GND
USB V0
USB D1-
USB D1+
J15: ATX Power Control Selection
PIIX4
82443BX
JP6
J15
Open: Soft Off Close: Full On
J13:Wake On LAN

Quick Installation Guide
14
PIIX4
82443BX
JP6
J15
Pin No. Function
1+5V SB
2GND
3Signal
1
J13
J14:Creative PCI Sound Card Support
PIIX4
82443BX
JP6
Pin No.
Function
1Signal
2GND
3NC
4Signal
5GND
6Signal
1
2
5 6
4
SB-LINK
J14

686BX
15
III. Top Performance Test Setting:
The following performance data list is the testing results of some popular
benchmark testing programs.
Users have to modify the value for each item in chipset features as follow
for top performance setting.
ROM PCI / ISA BIOS
CHIPSET FEATURES SETUP
AWARD SOFTWARE, INC.
: Select ItemESC
F1
F5
F7 : Load PERFORMANCE Defaults
: Quit
: Help
: Old Values
PU/PD/+/-
(Shift)F2
: Modify
: Color
EDO RASx# Wait State
: 1
EDO CASx# MA Wait State
DRAM Data Integrity Mode
: 1
Video RAM Cacheable
: Disabled
: Non-ECC
System BIOS Cacheable
: Enabled
Memory Hole At 15M-16M
Delayed Transaction : Disabled
: Disabled
16 Bit I/O Recovery Time
: 1
SDRAM CAS latency Time : 2
Video BIOS Cacheable
: Enabled
¡ô¡õ¡÷¡ö
Current CPU FAN Speed
Current +3.3 V : 3.53 V
Current CPUVC
ore
A : 2.83 V
Current +12 V
Current - 12 V
Current - 5 V
: 12.28 V
:-11.81 V
:-5.04 V
Current +5 V : 4.99 V
Current CPU Temperature
Current CPUVCore B : 1.50 V
Current Battery Life : OK
: 5152 RPM
: 56
/132
¢K
¢J
CPU Temperature Select
Slow Down CPU Duty Cycle : Disable
Alarm When CPU Overheat
CPUFan Control
: 75 /167
¢K¢J
: Disabled
: Disabled
F6
: Load BIOS Defaults
*CPUFan Fail Alarm : Disabled
Clock Spread Spectrum : Disable

Quick Installation Guide
16
These data are just referred by users, and there is no responsibility for
different testing data values gotten by users. (Different Hardware &
Software configuration will result in different benchmark testing results.)
•CPU PentiumII processor
•DRAM (32 x 2) MB SDRAM (MICRON MT 48LC2M8A1 -8)
•CACHE SIZE 512 KB included in CPU
•DISPLAY GA-600 AGP Display Card (4MB SGRAM)
•STORAGE Onboard IDE (IBM DHEA-36480)
•O.S. Windows NT™4.0
•DRIVER Display Driver at 1024 x 768 x 64k colors x 75Hz.
TRIONES Bus Master IDE Driver 3.70
Intel PentiumII
Processor 300MHz(100x3)
Winbench98 795 952
FPU Winmark 1560 1850
Business Disk 1670 1780
Hi-End Disk 3300 3620
Business Graphics 165 188
Hi-End Graphics 183 214
Winstone98Business 29.8 33.8
Hi-End 31.2 35.3