
GIGA-BYTE TECHNOLOGY CO., LTD.

GA-686LX4 (VER. 2.2)

Device Type              Mainboard
Processor                Pentium II/Celeron
Processor Speed          233/266/300/333MHz
Chip Set                 Intel 440LX
Maximum Onboard Memory   1GB (EDO & SDRAM supported)
Cache                    0/128/256/512KB (located on the 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, SB-link connector, wake on
                         LAN connector, wake on modem connector

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  AGP slot                 AGP         IDE interface 1           CN8

  ATX power                ATX         Floppy drive              CN9
  connector                            interface

  CPU fan power             C1         IR connector              IR1

  SB-link connector         C2         Wake on LAN               J13
                                       connector

  Power fan power           C3         Wake on modem             J19
                                       connector

  Chassis fan power         C4         Green PC LED          JP7/pins 1 &
                                                                 12

  Parallel port            CN1         Reset switch          JP7/pins 3 &
                                                                  4

  Serial port 1            CN2         Speaker               JP7/pins 5 -
                                                                  8

  Serial port 2            CN3         IDE interface LED     JP7/pins 9 &
                                                                 20

  USB connector 1          CN4         Green PC connector   JP7/pins 11 &
                                                                 22

  USB connector 2          CN5         Soft off power       JP7/pins 15 &
                                       supply                    16

  PS/2 mouse port          CN6         Power LED            JP7/pins 17 -
                                                                 19

  IDE interface 2          CN7         32-bit PCI slots       PC1 - PC4

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Keyboard power on disabled              JP1           Pins 2 & 3
                                                              closed

      Keyboard power on enabled               JP1           Pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP8           Pins 2 & 3
                                                              closed

      CMOS memory clear                       JP8           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

                        DIMM CONFIGURATION (CON'T)

      Size          Bank 0        Bank 1         Bank 2         Bank 3

     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

     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. 128KB cache
  is located on the Celeron 300A & 333 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

