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# GIGA-BYTE TECHNOLOGY CO., LTD.
GA-686DX
Processor Pentium Pro
Processor Speed 150/166/180/200/233/266MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 512MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512KB (located on Pentium Pro 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 connector, ATX power
connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| ATX power | ATX | Reset switch | J2 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN1 | Power LED | J3 |
|-------------------+----------+------------------+----------|
| Parallel port | CN2 | IDE interface | J4 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | IR connector | J5 |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN4 | Green PC | J6 |
| | | connector | |
|-------------------+----------+------------------+----------|
| USB connector | CN5 | Soft on power | J7 |
| (optional) | | supply | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | Green PC LED | J8 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN7 | Chassis fan | JP2 |
| | | power | |
|-------------------+----------+------------------+----------|
| Floppy drive | CN8 | Chassis fan | JP4 |
| interface | | power | |
|-------------------+----------+------------------+----------|
| Speaker | J1 | 32-bit PCI slots | PC1 – |
| | | | PC5 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM 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) 2M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 24MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (2) 4M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 48MB | (2) 4M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 56MB | (2) 4M x 36 | (2) 2M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (2) 8M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 80MB | (2) 8M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 88MB | (2) 8M x 36 | (2) 2M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 96MB | (2) 4M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 96MB | (2) 8M x 36 | (2) 2M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 104MB | (2) 8M x 36 | (2) 4M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 112MB | (2) 8M x 36 | (2) 4M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 128MB | (2) 8M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 128MB | (2) 16M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 136MB | (2) 8M x 36 | (2) 8M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 136MB | (2) 16M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 144MB | (2) 16M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 144MB | (2) 16M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 152MB | (2) 16M x 36 | (2) 2M x 36 | (2) 1M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 160MB | (2) 16M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 160MB | (2) 16M x 36 | (2) 2M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 168MB | (2) 16M x 36 | (2) 4M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 176MB | (2) 16M x 36 | (2) 4M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 192MB | (2) 16M x 36 | (2) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 192MB | (2) 16M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 200MB | (2) 16M x 36 | (2) 8M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 208MB | (2) 16M x 36 | (2) 8M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 224MB | (2) 16M x 36 | (2) 8M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 256MB | (2) 16M x 36 | (2) 16M x 36 | None |
|------------+---------------+---------------+---------------|
| 256MB | (2) 16M x 36 | (2) 8M x 36 | (2) 8M x 36 |
|------------+---------------+---------------+---------------|
| 256MB | (2) 32M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 264MB | (2) 16M x 36 | (2) 16M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 264MB | (2) 32M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 272MB | (2) 16M x 36 | (2) 16M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 272MB | (2) 32M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 288MB | (2) 16M x 36 | (2) 16M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 288MB | (2) 32M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 320MB | (2) 16M x 36 | (2) 16M x 36 | (2) 8M x 36 |
|------------+---------------+---------------+---------------|
| 320MB | (2) 32M x 36 | (2) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 384MB | (2) 16M x 36 | (2) 16M x 36 | (2) 16M x 36 |
|------------+---------------+---------------+---------------|
| 384MB | (2) 32M x 36 | (2) 16M x 36 | None |
|------------+---------------+---------------+---------------|
| 512MB | (2) 32M x 36 | (2) 32M x 36 | None |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB/512KB cache is located on the Pentium Pro CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | S1/1 | S1/2 | S1/3 | S1/4 |
|------------+-----------+-----------+-----------+-----------|
| 150MHz | On | On | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 166MHz | Off | On | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 180MHz | On | Off | On | Off |
|------------+-----------+-----------+-----------+-----------|
| 200MHz | Off | Off | On | Off |
|------------+-----------+-----------+-----------+-----------|
| 233MHz | Off | On | On | Off |
|------------+-----------+-----------+-----------+-----------|
| 266MHz | Off | Off | Off | On |
+------------------------------------------------------------+