
GIGA-BYTE TECHNOLOGY CO., LTD.

GA-686LX4 (VER. 1.0)

Device Type            Mainboard
Processor              Pentium II
Processor Speed        200/233/266/300/333/366MHz
Chip Set               Intel 440LX
Maximum Onboard Memory 1GB (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               J1

  Parallel port              CN1       32-bit PCI slots         PC1 - PC4

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      ATX power supply select soft off        J16              Open

      ATX power supply select full on         J16             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         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

      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       None           None           None
                      64

     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    (1) 1M x 64       None           None
                      64

                        DIMM CONFIGURATION (CON'T)

      Size          Bank 0        Bank 1         Bank 2         Bank 3

     144MB         (1) 16M x    (1) 2M x 64       None           None
                      64

     176MB         (1) 16M x    (1) 2M x 64    (1) 2M x 64   (1) 2M x 64
                      64

     192MB         (1) 16M x    (1) 8M x 64       None           None
                      64

     192MB        (1) 8M x 64   (1) 8M x 64    (1) 8M x 64       None

     256MB         (1) 32M x       None           None           None
                      64

     256MB         (1) 16M x     (1) 16M x        None           None
                      64            64

     256MB        (1) 8M x 64   (1) 8M x 64    (1) 8M x 64   (1) 8M x 64

     272MB         (1) 16M x     (1) 16M x     (1) 1M x 64   (1) 1M x 64
                      64            64

     280MB         (1) 32M x    (1) 1M x 64    (1) 1M x 64   (1) 1M x 64
                      64

     288MB         (1) 16M x     (1) 16M x     (1) 2M x 64   (1) 2M x 64
                      64            64

     320MB         (1) 16M x     (1) 16M x     (1) 4M x 64   (1) 4M x 64
                      64            64

     384MB         (1) 16M x     (1) 16M x      (1) 16M x        None
                      64            64             64

     448MB         (1) 32M x    (1) 8M x 64    (1) 8M x 64   (1) 8M x 64
                      64

     512MB         (1) 32M x     (1) 32M x        None           None
                      64            64

     512MB         (1) 16M x     (1) 16M x      (1) 16M x    (1) 16M x 64
                      64            64             64

     640MB         (1) 32M x     (1) 16M x      (1) 16M x    (1) 16M x 64
                      64            64             64

     768MB         (1) 32M x     (1) 32M x      (1) 32M x        None
                      64            64             64

     1024MB        (1) 32M x     (1) 32M x      (1) 32M x    (1) 32M x 64
                      64            64             64

  Note: Board accepts EDO & SDRAM memory. Maximum SDRAM is 512MB. Maximum
  EDO is 1024MB.

                     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

