GA-686EX2 (REV. 1.0) Motherboard Settings and Configuration

GIGA-BYTE TECHNOLOGY CO., LTD.

GA-686EX2 (REV. 1.0)

Device Type
Mainboard
Processor
Pentium II
Processor Speed
200/233/266/300/333/366MHz
Chip Set
Intel 440EX
Video Chip Set
None
Maximum Onboard Memory
256MB (EDO & SDRAM supported)
Maximum Video Memory
None
Cache
256/512KB (located on Pentium II CPU)
BIOS
Award
Dimensions
243mm x 190mm
I/O Options
32-bit PCI slots (2), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), USB connectors (2), ATX power connector, AGP slot

CONNECTIONS
Purpose
Location
Purpose
Location
AGP slot
AGP
Serial port 1
CN2
ATX power connector
ATX
Serial port 2
CN3
Reset switch
C1
USB connector 1
CN4
Speaker
C2
USB connector 2
CN5
IDE interface LED
C3
Floppy drive interface
CN6
Soft off power supply
C4
IDE interface 2
CN7
Power LED
C5
IDE interface 1
CN8
CPU fan power
C6
PS/2 mouse port
J2
Parallel port
CN1
32-bit PCI slots
PC1 – PC2

USER CONFIGURABLE SETTINGS
Function
Label
Position

ATX power control select soft off
J7
Open

ATX power control select soft off/full on
J7
Closed

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
8MB
(1) 1M x 64
None
16MB
(1) 2M x 64
None
16MB
(1) 1M x 64
(1) 1M x 64
24MB
(1) 2M x 64
(1) 1M x 64
32MB
(1) 4M x 64
None
32MB
(1) 2M x 64
(1) 2M x 64
40MB
(1) 4M x 64
(1) 1M x 64
48MB
(1) 4M x 64
(1) 2M x 64
64MB
(1) 8M x 64
None
64MB
(1) 4M x 64
(1) 4M x 64
72MB
(1) 8M x 64
(1) 1M x 64
80MB
(1) 8M x 64
(1) 2M x 64
96MB
(1) 8M x 64
(1) 4M x 64
128MB
(1) 16M x 64
None
128MB
(1) 8M x 64
(1) 8M x 64

DIMM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
136MB
(1) 16M x 64
(1) 1M x 64
144MB
(1) 16M x 64
(1) 2M x 64
160MB
(1) 16M x 64
(1) 4M x 64
192MB
(1) 16M x 64
(1) 8M x 64
256MB
(1) 16M x 64
(1) 16M x 64
Note: Board accepts EDO & SDRAM memory.

CACHE CONFIGURATION
Note: 256KB/512KB cache is located on the Pentium II CPU.

CPU SPEED SELECTION
CPU speed
Clock speed
Multiplier
JP2
JP3
JP4
200MHz
66MHz
3x
1 & 2
1 & 2
1 & 2
233MHz
66MHz
3.5x
1 & 2
1 & 2
1 & 2
266MHz
66MHz
4x
1 & 2
1 & 2
1 & 2
300MHz
66MHz
4.5x
1 & 2
1 & 2
1 & 2
333MHz
66MHz
5x
1 & 2
1 & 2
1 & 2
366MHz
66MHz
5.5x
1 & 2
1 & 2
1 & 2
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (CON’T)
CPU speed
Clock speed
Multiplier
SW1/1
SW1/2
SW1/3
SW1/4
200MHz
66MHz
3x
On
Off
On
On
233MHz
66MHz
3.5x
Off
Off
On
On
266MHz
66MHz
4x
On
On
Off
On
300MHz
66MHz
4.5x
Off
On
Off
On
333MHz
66MHz
5x
On
Off
Off
On
366MHz
66MHz
5.5x
Off
Off
Off
On

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Device Type	Mainboard
Processor	Pentium II
Processor Speed	200/233/266/300/333/366MHz
Chip Set	Intel 440EX
Video Chip Set	None
Maximum Onboard Memory	256MB (EDO & SDRAM supported)
Maximum Video Memory	None
Cache	256/512KB (located on Pentium II CPU)
BIOS	Award
Dimensions	243mm x 190mm
I/O Options	32-bit PCI slots (2), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), USB connectors (2), ATX power connector, AGP slot

CONNECTIONS
Purpose	Location	Purpose	Location
AGP slot	AGP	Serial port 1	CN2
ATX power connector	ATX	Serial port 2	CN3
Reset switch	C1	USB connector 1	CN4
Speaker	C2	USB connector 2	CN5
IDE interface LED	C3	Floppy drive interface	CN6
Soft off power supply	C4	IDE interface 2	CN7
Power LED	C5	IDE interface 1	CN8
CPU fan power	C6	PS/2 mouse port	J2
Parallel port	CN1	32-bit PCI slots	PC1 – PC2

USER CONFIGURABLE SETTINGS
Function		Label	Position
	ATX power control select soft off	J7	Open
	ATX power control select soft off/full on	J7	Closed
	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
8MB	(1) 1M x 64	None
16MB	(1) 2M x 64	None
16MB	(1) 1M x 64	(1) 1M x 64
24MB	(1) 2M x 64	(1) 1M x 64
32MB	(1) 4M x 64	None
32MB	(1) 2M x 64	(1) 2M x 64
40MB	(1) 4M x 64	(1) 1M x 64
48MB	(1) 4M x 64	(1) 2M x 64
64MB	(1) 8M x 64	None
64MB	(1) 4M x 64	(1) 4M x 64
72MB	(1) 8M x 64	(1) 1M x 64
80MB	(1) 8M x 64	(1) 2M x 64
96MB	(1) 8M x 64	(1) 4M x 64
128MB	(1) 16M x 64	None
128MB	(1) 8M x 64	(1) 8M x 64

DIMM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1
136MB	(1) 16M x 64	(1) 1M x 64
144MB	(1) 16M x 64	(1) 2M x 64
160MB	(1) 16M x 64	(1) 4M x 64
192MB	(1) 16M x 64	(1) 8M x 64
256MB	(1) 16M x 64	(1) 16M x 64
Note: Board accepts EDO & SDRAM memory.

CPU SPEED SELECTION
CPU speed	Clock speed	Multiplier	JP2	JP3	JP4
200MHz	66MHz	3x	1 & 2	1 & 2	1 & 2
233MHz	66MHz	3.5x	1 & 2	1 & 2	1 & 2
266MHz	66MHz	4x	1 & 2	1 & 2	1 & 2
300MHz	66MHz	4.5x	1 & 2	1 & 2	1 & 2
333MHz	66MHz	5x	1 & 2	1 & 2	1 & 2
366MHz	66MHz	5.5x	1 & 2	1 & 2	1 & 2
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (CON’T)
CPU speed	Clock speed	Multiplier	SW1/1	SW1/2	SW1/3	SW1/4
200MHz	66MHz	3x	On	Off	On	On
233MHz	66MHz	3.5x	Off	Off	On	On
266MHz	66MHz	4x	On	On	Off	On
300MHz	66MHz	4.5x	Off	On	Off	On
333MHz	66MHz	5x	On	Off	Off	On
366MHz	66MHz	5.5x	Off	Off	Off	On