
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 (CONT)

     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

