
GIGA-BYTE TECHNOLOGY CO., LTD.

GA-686NX

Processor              Pentium Pro
Processor Speed        150/166/180/200/233/266MHz
Chip Set               Intel
Video Chip Set         None
Maximum Onboard Memory 512MB (EDO supported)
Maximum Video Memory   None
Cache                  256/512KB (located on Pentium Pro CPU)
BIOS                   Award
Dimensions             305mm x 244mm
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, VRM
                       connector, USB connector, ATX power connector
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  ATX power supply           ATX       Speaker                     J2

  Serial port 2              CN1       Reset switch                J3

  Parallel port              CN2       Power LED                   J4

  PS/2 mouse port            CN4       IDE interface LED           J5

  Serial port 1              CN5       IR connector                J6

  USB connector              CN6       Green PC connector          J7

  IDE interface 2            CN7       Soft on power supply        J8

  IDE interface 1            CN8       Green PC LED                J9

  Floppy drive interface     CN9       Chassis fan power          JP1

  VRM connector               J1       32-bit PCI slots         PC1  PC4

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not           JP2          Unidentified
      alter

     Factory configured - do not           JP4          Unidentified
      alter

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      8MB         (2) 1M x 36        None

      16MB        (2) 2M x 36        None

      16MB        (2) 1M x 36    (2) 1M x 36

      24MB        (2) 2M x 36    (2) 1M x 36

      32MB        (2) 4M x 36        None

      32MB        (2) 2M x 36    (2) 2M x 36

      40MB        (2) 4M x 36    (2) 1M x 36

      48MB        (2) 4M x 36    (2) 2M x 36

      64MB        (2) 8M x 36        None

      64MB        (2) 4M x 36    (2) 4M x 36

      72MB        (2) 8M x 36    (2) 1M x 36

      80MB        (2) 8M x 36    (2) 2M x 36

      96MB        (2) 8M x 36    (2) 4M x 36

     128MB        (2) 8M x 36    (2) 8M x 36

     128MB        (2) 16M x 36       None

     136MB        (2) 16M x 36   (2) 1M x 36

     144MB        (2) 16M x 36   (2) 2M x 36

     160MB        (2) 16M x 36   (2) 4M x 36

     192MB        (2) 16M x 36   (2) 8M x 36

     256MB        (2) 16M x 36   (2) 16M x 36

     256MB        (2) 32M x 36       None

     264MB        (2) 32M x 36   (2) 1M x 36

          DRAM CONFIGURATION (CONT)

      Size          Bank 0          Bank 1

     272MB        (2) 32M x 36   (2) 2M x 36

     288MB        (2) 32M x 36   (2) 4M x 36

     320MB        (2) 32M x 36   (2) 8M x 36

     384MB        (2) 32M x 36   (2) 16M x 36

     512MB        (2) 32M x 36   (2) 32M x 36

  Note: Board accepts EDO memory.

                      CACHE CONFIGURATION

  Note: 256KB/512KB cache is located on the Pentium Pro CPU.

               CPU SPEED SELECTION

  Speed     S1/1      S1/2      S1/3      S1/4

  150MHz     On        On       Off       Off

  166MHz     Off       On       Off       Off

  180MHz     On        Off       On       Off

  200MHz     Off       Off       On       Off

  233MHz     Off       On        On       Off

  266MHz     Off       Off      Off        On

