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 1GB (SDRAM supported) Memory Maximum Video None Memory 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 [Image] CONNECTIONS Purpose Location Purpose Location AGP slot AGP PS/2 mouse port CN6 ATX power ATX IDE interface 2 CN7 connector Speaker C1 IDE interface 1 CN8 Reset switch C2 Floppy drive CN9 interface Power LED C3 System AC back J15 connector IDE interface LED C4 Wake on LAN JP7 connector IR connector C5 SB-link connector JP8 Green PC C6 Green PC LED JP9/pins 1 & connector 10 Soft off power C7 Reset switch JP9/pins 2 & 3 supply 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 JP9/pins 12 & supply 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 Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 speed speed 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