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# GIGA-BYTE TECHNOLOGY CO., LTD.
GA-686LX3 (VER. 1.0)
Device Type Mainboard
Processor Pentium II
Processor Speed 200/233/266/300/333/366MHz
Chip Set Intel 440LX
Maximum Onboard 768MB (EDO & SDRAM supported)
Memory
Cache 256/512KB (located on Pentium II CPU)
BIOS Award
Dimensions 305mm x 180mm
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
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| AGP slot | AGP | Serial port 1 | CN2 |
|-------------------+----------+------------------+----------|
| ATX power | ATX | Serial port 2 | CN3 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Speaker | C1 | USB connector 1 | CN4 |
|-------------------+----------+------------------+----------|
| Reset switch | C2 | USB connector 2 | CN5 |
|-------------------+----------+------------------+----------|
| Power LED | C3 | PS/2 mouse port | CN6 |
|-------------------+----------+------------------+----------|
| IDE interface LED | C4 | IDE interface 2 | CN7 |
|-------------------+----------+------------------+----------|
| IR connector | C5 | IDE interface 1 | CN8 |
|-------------------+----------+------------------+----------|
| Green PC | C6 | Floppy drive | CN9 |
| connector | | interface | |
|-------------------+----------+------------------+----------|
| Soft off power | C7 | CPU fan power | J2 |
| supply | | | |
|-------------------+----------+------------------+----------|
| Parallel port | CN1 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|--------------------------------------+-------+-------------|
| | ATX power supply select soft off | J13 | Open |
|---+----------------------------------+-------+-------------|
| | ATX power supply select full on | J13 | Closed |
|---+----------------------------------+-------+-------------|
| ยป | Keyboard power on disabled | JP1 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Keyboard power on enabled | JP1 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 8MB | (1) 1M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 2M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 24MB | (1) 1M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 32MB | (1) 4M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 32MB | (1) 2M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 | None |
|------------+---------------+---------------+---------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 40MB | (1) 2M x 64 | (1) 2M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 | None |
|------------+---------------+---------------+---------------|
| 48MB | (1) 2M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 56MB | (1) 4M x 64 | (1) 2M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 64MB | (1) 8M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 64MB | (1) 4M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 | None |
|------------+---------------+---------------+---------------|
| 72MB | (1) 8M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 72MB | (1) 4M x 64 | (1) 4M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 80MB | (1) 8M x 64 | (1) 1M x 64 | (1) 1M x 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|---------+------------------+---------------+---------------|
| 80MB | (1) 8M x 64 | (1) 2M x 64 | None |
|---------+------------------+---------------+---------------|
| 80MB | (1) 4M x 64 | (1) 4M x 64 | (1) 2M x 64 |
|---------+------------------+---------------+---------------|
| 88MB | (1) 8M x 64 | (1) 2M x 64 | (1) 1M x 64 |
|---------+------------------+---------------+---------------|
| 96MB | (1) 8M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|---------+------------------+---------------+---------------|
| 96MB | (1) 8M x 64 | (1) 4M x 64 | None |
|---------+------------------+---------------+---------------|
| 96MB | (1) 4M x 64 | (1) 4M x 64 | (1) 4M x 64 |
|---------+------------------+---------------+---------------|
| 104MB | (1) 8M x 64 | (1) 4M x 64 | (1) 1M x 64 |
|---------+------------------+---------------+---------------|
| 112MB | (1) 8M x 64 | (1) 4M x 64 | (1) 2M x 64 |
|---------+------------------+---------------+---------------|
| 128MB | (1) 16M x 64 | None | None |
|---------+------------------+---------------+---------------|
| 128MB | (1) 8M x 64 | (1) 4M x 64 | (1) 4M x 64 |
|---------+------------------+---------------+---------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 | None |
|---------+------------------+---------------+---------------|
| 136MB | (1) 16M x 64 | (1) 1M x 64 | None |
|---------+------------------+---------------+---------------|
| 136MB | (1) 8M x 64 | (1) 8M x 64 | (1) 1M x 64 |
|---------+------------------+---------------+---------------|
| 144MB | (1) 16M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|---------+------------------+---------------+---------------|
| 144MB | (1) 16M x 64 | (1) 2M x 64 | None |
|---------+------------------+---------------+---------------|
| 144MB | (1) 8M x 64 | (1) 8M x 64 | (1) 2M x 64 |
|---------+------------------+---------------+---------------|
| 152MB | (1) 16M x 64 | (1) 2M x 64 | (1) 1M x 64 |
|---------+------------------+---------------+---------------|
| 160MB | (1) 16M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|---------+------------------+---------------+---------------|
| 168MB | (1) 16M x 64 | (1) 4M x 64 | (1) 1M x 64 |
|---------+------------------+---------------+---------------|
| 176MB | (1) 16M x 64 | (1) 4M x 64 | (1) 2M x 64 |
|---------+------------------+---------------+---------------|
| 192MB | (1) 16M x 64 | (1) 4M x 64 | (1) 4M x 64 |
|---------+------------------+---------------+---------------|
| 192MB | (1) 16M x 64 | (1) 8M x 64 | None |
|---------+------------------+---------------+---------------|
| 192MB | (1) 8M x 64 | (1) 8M x 64 | (1) 8M x 64 |
|---------+------------------+---------------+---------------|
| 256MB | (1) 32M x 64 | None | None |
|---------+------------------+---------------+---------------|
| 256MB | (1) 16M x 64 | (1) 8M x 64 | (1) 8M x 64 |
|---------+------------------+---------------+---------------|
| 264MB | (1) 32M x 64 | (1) 1M x 64 | None |
|---------+------------------+---------------+---------------|
| 272MB | (1) 32M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|---------+------------------+---------------+---------------|
| 272MB | (1) 32M x 64 | (1) 2M x 64 | None |
|---------+------------------+---------------+---------------|
| 288MB | (1) 32M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|---------+------------------+---------------+---------------|
| 288MB | (1) 32M x 64 | (1) 4M x 64 | None |
|---------+------------------+---------------+---------------|
| 320MB | (1) 32M x 64 | (1) 4M x 64 | (1) 4M x 64 |
|---------+------------------+---------------+---------------|
| 320MB | (1) 32M x 64 | (1) 8M x 64 | None |
|---------+------------------+---------------+---------------|
| 384MB | (1) 32M x 64 | (1) 8M x 64 | (1) 8M x 64 |
|---------+------------------+---------------+---------------|
| 384MB | (1) 32M x 64 | (1) 16M x 64 | None |
|---------+------------------+---------------+---------------|
| 384MB | (1) 16M x 64 | (1) 16M x 64 | (1) 16M x 64 |
|---------+------------------+---------------+---------------|
| 512MB | (1) 32M x 64 | (1) 16M x 64 | (1) 16M x 64 |
|---------+------------------+---------------+---------------|
| 512MB | (1) 32M x 64 | (1) 32M x 64 | None |
|---------+------------------+---------------+---------------|
| 768MB | (1) 32M x 64 | (1) 32M x 64 | (1) 32M x 64 |
|------------------------------------------------------------|
| Note: Board accepts EDO & SDRAM memory. Maximum SDRAM is |
| 384MB. Maximum EDO is 768MB. |
+------------------------------------------------------------+
+-----------------------------------------------------------+
| CACHE CONFIGURATION |
|-----------------------------------------------------------|
| Note: 256KB/512KB cache is located on the Pentium II CPU. |
+-----------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| CPU speed | Clock | Multiplier | JP2 | JP3 | JP4 |
| | speed | | | | |
|------------+----------+------------+-------+-------+-------|
| 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 |
+------------------------------------------------------------+