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# GIGA-BYTE TECHNOLOGY CO., LTD.
GA-686KX
Device Type Mainboard
Processor Pentium II
Processor Speed 200/233/266/300/333/366MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 768MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 256/512KB (located on Pentium II CPU)
BIOS Award
Dimensions 305mm x 244mm
I/O Options 32-bit PCI slots (5), 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
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| ATX power | ATX | CPU fan power | J1 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN1 | Speaker | J3 |
|-------------------+----------+------------------+----------|
| Parallel port | CN2 | Reset switch | J4 |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | Power LED | J5 |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN4 | IDE interface | J6 |
| | | LED | |
|-------------------+----------+------------------+----------|
| USB connector 1 | CN5 | IR connector | J7 |
|-------------------+----------+------------------+----------|
| USB connector 2 | CN5A | Soft off power | J9 |
| | | supply | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN6 | Green PC LED | J10 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN7 | 32-bit PCI slots | PC1 – |
| | | | PC5 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN8 | | |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | J8 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 8MB | (2) 1M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 16MB | (2) 2M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 24MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 32MB | (2) 4M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 48MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 64MB | (2) 8M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 96MB | (2) 4M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 128MB | (2) 16M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 192MB | (2) 8M x 36 | (2) 8M x 36 | (2) 8M x 36 |
|------------+---------------+---------------+---------------|
| 256MB | (2) 16M x 36 | (2) 16M x 36 | None |
|------------+---------------+---------------+---------------|
| 256MB | (2) 32M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 384MB | (2) 16M x 36 | (2) 16M x 36 | (2) 16M x 36 |
|------------+---------------+---------------+---------------|
| 512MB | (2) 32M x 36 | (2) 32M x 36 | None |
|------------+---------------+---------------+---------------|
| 768MB | (2) 32M x 36 | (2) 32M x 36 | (2) 32M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB/512KB cache is located on the Pentium II CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | S1/1 | S1/2 | S1/3 | S1/4 |
| speed | speed | | | | | |
|---------+---------+------------+------+------+------+------|
| 200MHz | 66MHz | 3x | Off | On | Off | Off |
|---------+---------+------------+------+------+------+------|
| 233MHz | 66MHz | 3.5x | On | On | Off | Off |
|---------+---------+------------+------+------+------+------|
| 266MHz | 66MHz | 4x | Off | Off | On | Off |
|---------+---------+------------+------+------+------+------|
| 300MHz | 66MHz | 4.5x | On | Off | On | Off |
|---------+---------+------------+------+------+------+------|
| 333MHz | 66MHz | 5x | Off | On | On | Off |
|---------+---------+------------+------+------+------+------|
| 366MHz | 66MHz | 5.5x | On | On | On | Off |
+------------------------------------------------------------+