GA-686BX (REV. 2.0) Motherboard Settings and Configuration

GIGA-BYTE TECHNOLOGY CO., LTD.

GA-686BX (REV. 2.0)

Device Type
Mainboard
Processor
Pentium II
Processor Speed
233/266/300/333/350/366/400/450MHz
Chip Set
Intel 440BX
Video Chip Set
None
Maximum Onboard Memory
1GB (SDRAM supported)
Maximum Video Memory
None
Cache
512KB (located on Pentium II CPU)
BIOS
Award
Dimensions
305mm x 190mm
I/O Options
32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), IR connector, USB connectors (2), ATX power connector, AGP slot, SB-link connector, wake on LAN connector

CONNECTIONS
Purpose
Location
Purpose
Location
AGP slot
AGP
PS/2 mouse port
CN6
ATX power connector
ATX
IDE interface 2
CN7
Speaker
C1
IDE interface 1
CN8
Reset switch
C2
Floppy drive interface
CN9
Power LED
C3
System AC back connector
J15
IDE interface LED
C4
Wake on LAN connector
JP7
IR connector
C5
SB-link connector
JP8
Green PC connector
C6
Green PC LED
JP9/pins 1 & 10
Soft off power supply
C7
Reset switch
JP9/pins 2 & 3
Green PC LED
C8
Speaker
JP9/pins 4 - 7
CPU fan power
C9
IDE interface LED
JP9/pins 8 & 17
Parallel port
CN1
Green PC connector
JP9/pins 9 & 18
Serial port 1
CN2
Soft off power supply
JP9/pins 12 & 13
Serial port 2
CN3
Power LED
JP9/pins 14 - 16
USB connector 1
CN4
32-bit PCI slots
PC1 – PC4
USB connector 2
CN5

USER CONFIGURABLE SETTINGS
Function
Label
Position

Keyboard power on enabled
JP1
Pins 1 & 2 closed

Keyboard power on disabled
JP1
Pins 2 & 3 closed

DIMM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
8MB
(1) 1M x 64
None
None
None
16MB
(1) 2M x 64
None
None
None
16MB
(1) 1M x 64
(1) 1M x 64
None
None
24MB
(1) 2M x 64
(1) 1M x 64
None
None
24MB
(1) 1M x 64
(1) 1M x 64
(1) 1M x 64
None
32MB
(1) 4M x 64
None
None
None
32MB
(1) 2M x 64
(1) 2M x 64
None
None
32MB
(1) 1M x 64
(1) 1M x 64
(1) 1M x 64
(1) 1M x 64
40MB
(1) 4M x 64
(1) 1M x 64
None
None
48MB
(1) 4M x 64
(1) 2M x 64
None
None

DIMM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
48MB
(1) 2M x 64
(1) 2M x 64
(1) 2M x 64
None
64MB
(1) 2M x 64
(1) 2M x 64
(1) 2M x 64
(1) 2M x 64
64MB
(1) 8M x 64
None
None
None
64MB
(1) 4M x 64
(1) 4M x 64
None
None
72MB
(1) 8M x 64
(1) 1M x 64
None
None
80MB
(1) 8M x 64
(1) 2M x 64
None
None
96MB
(1) 8M x 64
(1) 4M x 64
None
None
96MB
(1) 4M x 64
(1) 4M x 64
(1) 4M x 64
None
128MB
(1) 16M x 64
None
None
None
128MB
(1) 8M x 64
(1) 8M x 64
None
None
128MB
(1) 4M x 64
(1) 4M x 64
(1) 4M x 64
(1) 4M x 64
136MB
(1) 16M x 64
(1) 1M x 64
None
None
144MB
(1) 16M x 64
(1) 2M x 64
None
None
152MB
(1) 16M x 64
(1) 1M x 64
(1) 1M x 64
(1) 1M x 64
160MB
(1) 16M x 64
(1) 4M x 64
None
None
176MB
(1) 16M x 64
(1) 2M x 64
(1) 2M x 64
(1) 2M x 64
192MB
(1) 16M x 64
(1) 8M x 64
None
None
192MB
(1) 8M x 64
(1) 8M x 64
(1) 8M x 64
None
224MB
(1) 16M x 64
(1) 4M x 64
(1) 4M x 64
(1) 4M x 64
256MB
(1) 32M x 64
None
None
None
256MB
(1) 16M x 64
(1) 16M x 64
None
None
256MB
(1) 8M x 64
(1) 8M x 64
(1) 8M x 64
(1) 8M x 64
272MB
(1) 16M x 64
(1) 16M x 64
(1) 1M x 64
(1) 1M x 64
280MB
(1) 32M x 64
(1) 1M x 64
(1) 1M x 64
(1) 1M x 64
288MB
(1) 16M x 64
(1) 16M x 64
(1) 2M x 64
(1) 2M x 64
320MB
(1) 16M x 64
(1) 16M x 64
(1) 4M x 64
(1) 4M x 64
320MB
(1) 16M x 64
(1) 8M x 64
(1) 8M x 64
(1) 8M x 64
352MB
(1) 32M x 64
(1) 4M x 64
(1) 4M x 64
(1) 4M x 64
384MB
(1) 16M x 64
(1) 16M x 64
(1) 16M x 64
None
448MB
(1) 32M x 64
(1) 8M x 64
(1) 8M x 64
(1) 8M x 64
512MB
(1) 32M x 64
(1) 32M x 64
None
None
512MB
(1) 16M x 64
(1) 16M x 64
(1) 16M x 64
(1) 16M x 64
640MB
(1) 32M x 64
(1) 16M x 64
(1) 16M x 64
(1) 16M x 64
768MB
(1) 32M x 64
(1) 32M x 64
(1) 32M x 64
None
1024MB
(1) 32M x 64
(1) 32M x 64
(1) 32M x 64
(1) 32M x 64
Note: Board accepts SDRAM memory.

CACHE CONFIGURATION
Note: 512KB cache is located on the Pentium II CPU.

CPU SPEED SELECTION
CPU speed
Clock speed
Multiplier
SW1/1
SW1/2
SW1/3
SW1/4
233MHz
66MHz
3.5x
Off
Off
On
On
266MHz
66MHz
4x
On
On
Off
On
300MHz
66MHz
4.5x
Off
On
Off
On
300MHz
100MHz
3x
On
Off
On
On
333MHz
66MHz
5x
On
Off
Off
On
350MHz
100MHz
3.5x
Off
Off
On
On
366MHz
66MHz
5.5x
Off
Off
Off
On
400MHz
100MHz
4x
On
On
Off
On
450MHz
100MHz
4.5x
Off
On
Off
On

MAINBOARD BUS SPEED SELECTION
Speed
JP6
Auto detect
Pins 2 & 3 closed
66MHz
Pins 1 & 2 closed
100MHz
Open

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Device Type	Mainboard
Processor	Pentium II
Processor Speed	233/266/300/333/350/366/400/450MHz
Chip Set	Intel 440BX
Video Chip Set	None
Maximum Onboard Memory	1GB (SDRAM supported)
Maximum Video Memory	None
Cache	512KB (located on Pentium II CPU)
BIOS	Award
Dimensions	305mm x 190mm
I/O Options	32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), IR connector, USB connectors (2), ATX power connector, AGP slot, SB-link connector, wake on LAN connector

CONNECTIONS
Purpose	Location	Purpose	Location
AGP slot	AGP	PS/2 mouse port	CN6
ATX power connector	ATX	IDE interface 2	CN7
Speaker	C1	IDE interface 1	CN8
Reset switch	C2	Floppy drive interface	CN9
Power LED	C3	System AC back connector	J15
IDE interface LED	C4	Wake on LAN connector	JP7
IR connector	C5	SB-link connector	JP8
Green PC connector	C6	Green PC LED	JP9/pins 1 & 10
Soft off power supply	C7	Reset switch	JP9/pins 2 & 3
Green PC LED	C8	Speaker	JP9/pins 4 - 7
CPU fan power	C9	IDE interface LED	JP9/pins 8 & 17
Parallel port	CN1	Green PC connector	JP9/pins 9 & 18
Serial port 1	CN2	Soft off power supply	JP9/pins 12 & 13
Serial port 2	CN3	Power LED	JP9/pins 14 - 16
USB connector 1	CN4	32-bit PCI slots	PC1 – PC4
USB connector 2	CN5

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Keyboard power on enabled	JP1	Pins 1 & 2 closed
	Keyboard power on disabled	JP1	Pins 2 & 3 closed

DIMM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
8MB	(1) 1M x 64	None	None	None
16MB	(1) 2M x 64	None	None	None
16MB	(1) 1M x 64	(1) 1M x 64	None	None
24MB	(1) 2M x 64	(1) 1M x 64	None	None
24MB	(1) 1M x 64	(1) 1M x 64	(1) 1M x 64	None
32MB	(1) 4M x 64	None	None	None
32MB	(1) 2M x 64	(1) 2M x 64	None	None
32MB	(1) 1M x 64	(1) 1M x 64	(1) 1M x 64	(1) 1M x 64
40MB	(1) 4M x 64	(1) 1M x 64	None	None
48MB	(1) 4M x 64	(1) 2M x 64	None	None

DIMM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
48MB	(1) 2M x 64	(1) 2M x 64	(1) 2M x 64	None
64MB	(1) 2M x 64	(1) 2M x 64	(1) 2M x 64	(1) 2M x 64
64MB	(1) 8M x 64	None	None	None
64MB	(1) 4M x 64	(1) 4M x 64	None	None
72MB	(1) 8M x 64	(1) 1M x 64	None	None
80MB	(1) 8M x 64	(1) 2M x 64	None	None
96MB	(1) 8M x 64	(1) 4M x 64	None	None
96MB	(1) 4M x 64	(1) 4M x 64	(1) 4M x 64	None
128MB	(1) 16M x 64	None	None	None
128MB	(1) 8M x 64	(1) 8M x 64	None	None
128MB	(1) 4M x 64	(1) 4M x 64	(1) 4M x 64	(1) 4M x 64
136MB	(1) 16M x 64	(1) 1M x 64	None	None
144MB	(1) 16M x 64	(1) 2M x 64	None	None
152MB	(1) 16M x 64	(1) 1M x 64	(1) 1M x 64	(1) 1M x 64
160MB	(1) 16M x 64	(1) 4M x 64	None	None
176MB	(1) 16M x 64	(1) 2M x 64	(1) 2M x 64	(1) 2M x 64
192MB	(1) 16M x 64	(1) 8M x 64	None	None
192MB	(1) 8M x 64	(1) 8M x 64	(1) 8M x 64	None
224MB	(1) 16M x 64	(1) 4M x 64	(1) 4M x 64	(1) 4M x 64
256MB	(1) 32M x 64	None	None	None
256MB	(1) 16M x 64	(1) 16M x 64	None	None
256MB	(1) 8M x 64	(1) 8M x 64	(1) 8M x 64	(1) 8M x 64
272MB	(1) 16M x 64	(1) 16M x 64	(1) 1M x 64	(1) 1M x 64
280MB	(1) 32M x 64	(1) 1M x 64	(1) 1M x 64	(1) 1M x 64
288MB	(1) 16M x 64	(1) 16M x 64	(1) 2M x 64	(1) 2M x 64
320MB	(1) 16M x 64	(1) 16M x 64	(1) 4M x 64	(1) 4M x 64
320MB	(1) 16M x 64	(1) 8M x 64	(1) 8M x 64	(1) 8M x 64
352MB	(1) 32M x 64	(1) 4M x 64	(1) 4M x 64	(1) 4M x 64
384MB	(1) 16M x 64	(1) 16M x 64	(1) 16M x 64	None
448MB	(1) 32M x 64	(1) 8M x 64	(1) 8M x 64	(1) 8M x 64
512MB	(1) 32M x 64	(1) 32M x 64	None	None
512MB	(1) 16M x 64	(1) 16M x 64	(1) 16M x 64	(1) 16M x 64
640MB	(1) 32M x 64	(1) 16M x 64	(1) 16M x 64	(1) 16M x 64
768MB	(1) 32M x 64	(1) 32M x 64	(1) 32M x 64	None
1024MB	(1) 32M x 64	(1) 32M x 64	(1) 32M x 64	(1) 32M x 64
Note: Board accepts SDRAM memory.

CPU SPEED SELECTION
CPU speed	Clock speed	Multiplier	SW1/1	SW1/2	SW1/3	SW1/4
233MHz	66MHz	3.5x	Off	Off	On	On
266MHz	66MHz	4x	On	On	Off	On
300MHz	66MHz	4.5x	Off	On	Off	On
300MHz	100MHz	3x	On	Off	On	On
333MHz	66MHz	5x	On	Off	Off	On
350MHz	100MHz	3.5x	Off	Off	On	On
366MHz	66MHz	5.5x	Off	Off	Off	On
400MHz	100MHz	4x	On	On	Off	On
450MHz	100MHz	4.5x	Off	On	Off	On

MAINBOARD BUS SPEED SELECTION
Speed	JP6
Auto detect	Pins 2 & 3 closed
66MHz	Pins 1 & 2 closed
100MHz	Open