
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 Memory 768MB (EDO & SDRAM supported)
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

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  AGP slot                   AGP       Serial port 1              CN2

  ATX power connector        ATX       Serial port 2              CN3

  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 connector          C6       Floppy drive               CN9
                                       interface

  Soft off power supply       C7       CPU fan power               J2

  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

     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 speed    Multiplier      JP2        JP3       JP4

    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       Clock    Multiplier     SW1/1    SW1/2     SW1/3     SW1/4
   speed     speed

  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

