
VEXTREC TECHNOLOGY, INC.

GMB-P56IPA (VER. 1.01)

Device Type         Mainboard
Processor           CX 6X68/AM K5/Pentium/Pentium MMX
Processor Speed     75/90/100/120/133/150/166/180/200MHz
Chip Set            Intel 430VX
Video Chip Set      S3
Maximum Onboard     128MB (EDO & SDRAM supported)
Memory
Maximum Video       2MB
Memory
Cache               256/512KB
BIOS                AMI/Award
I/O Options         IDE interfaces (2), floppy drive interface, parallel
                    port, PS/2 mouse port, serial ports (2), VGA port, VGA
                    feature connector, cache slot, expansion slot, IR
                    connector, USB connectors (2), FIR connector, MPEG
                    module connector, green PC connector
Dimensions          200mm x 320mm

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  Reset switch                J1        VGA port                  J14

  Green PC connector          J2        Parallel port             J15

  Suspend LED                 J3        Serial port 1             J16

  Speaker                     J4        Serial port 2             J17

  IDE interface LED           J5        USB connector 1           J18

  Power LED & keylock         J6        USB connector 2           J19

  IDE interface 1             J7        FIR connector             J20

  IDE interface 2             J8        IR connector              J21

  Floppy drive                J9        PS/2 mouse port           J22
  interface

  VGA feature connector       J12       Expansion slot            SL1

  S3 MPEG module              J13       Cache slot                SL2
  upgrade connector

                  USER CONFIGURABLE SETTINGS

                             S3 MPEG Module not        JP8         Open
                             installed

      S3 MPEG Module                 JP8              Closed
      installed

     CMOS memory normal             JP9               Open
      operation

      CMOS memory clear              JP9              Closed

      Flash BIOS voltage            JP13            Pins 1 & 2
      select 12v                                      closed

      Flash BIOS voltage            JP13            Pins 2 & 3
      select 5v                                       closed

      On board VGA enabled          JP14              Closed

      On board VGA                  JP14               Open
      disabled

                      DRAM CONFIGURATION

      Size          Bank 0          Bank 1          Bank 2

      8MB        (2) 1MB x 36        None            None

      16MB       (2) 1MB x 36    (2) 1MB x 36        None

      16MB       (2) 2MB x 36        None            None

      24MB       (2) 1MB x 36    (2) 1MB x 36    (1) 1MB x 64

      24MB       (2) 2MB x 36    (2) 1MB x 36        None

      32MB       (2) 2MB x 36    (2) 2MB x 36        None

      32MB       (2) 4MB x 36        None            None

      40MB       (2) 2MB x 36    (2) 2MB x 36    (1) 1MB x 64

      40MB       (2) 4MB x 36    (2) 1MB x 36        None

      48MB       (2) 2MB x 36    (2) 2MB x 36    (1) 2MB x 64

      48MB       (2) 4MB x 36    (2) 2MB x 36        None

      64MB       (2) 4MB x 36    (2) 4MB x 36        None

      64MB       (2) 8MB x 36        None            None

      72MB       (2) 4MB x 36    (2) 4MB x 36    (1) 1MB x 64

      72MB       (2) 8MB x 36    (2) 1MB x 36        None

      80MB       (2) 4MB x 36    (2) 4MB x 36    (1) 2MB x 64

      80MB       (2) 8MB x 36    (2) 2MB x 36        None

      96MB       (2) 4MB x 36    (2) 4MB x 36    (1) 4MB x 64

      96MB       (2) 8MB x 36    (2) 4MB x 36        None

     128MB       (2) 8MB x 36    (2) 8MB x 36        None

                            CACHE CONFIGURATION

     Size         Bank 0             Bank 1                  TAG

    256KB        (2) 32K x            None            (1) 8K/16K/32K x 8
                    36

    512KB        (2) 32K x         256K module        (1) 8K/16K/32K x 8
                    36          installed at SL2

            VIDEO MEMORY CONFIGURATION

     Size            Bank 0            Bank 1

      1MB        (2) 256KB x 16         None

      2MB        (2) 256KB x 16    (2) 256KB x 16

                       CPU SPEED SELECTION (CX 6X86)

  Speed     Clock    Multiplier    JP4   JP5     S1        S2       S3
            speed

  120MHz    60MHz        2x        1 &   2 &    Closed   Closed    Open
                                   2      3

  133MHz    66MHz        2x        1 &   2 &    Open     Closed    Open
                                   2      3

  150MHz    60MHz       2.5x       1 &   2 &    Closed    Open     Open
                                   2      3

  166MHz    66MHz       2.5x       1 &   2 &    Open      Open     Open
                                   2      3

  200MHz    66MHz        3x        1 &   2 &    Open      Open    Closed
                                   2      3

  Note: Designated pins should be in the closed position. Settings are
  with clock generator installed on U8.

                        CPU SPEED SELECTION (AM K5)

  Speed      Clock    Multiplier    JP4    JP5     S1       S2       S3
            speed

  75MHz     50MHz        1.5x       1 &    1 &   Closed    Closed   Open
                                    2      2

  90MHz     60MHz        1.5x       1 &    1 &   Closed    Open     Open
                                    2      2

  100MHz    66MHz        1.5x       1 &    1 &    Open     Open     Open
                                    2      2

  120MHz    60MHz         2x        1 &    1 &   Closed    Open     Open
                                    2      2

  133MHz    66MHz         2x        1 &    1 &    Open     Open     Open
                                    2      2

  150MHz    60MHz        2.5x       1 &    2 &   Closed    Open     Open
                                    2      3

  166MHz    66MHz        2.5x       1 &    2 &    Open     Open     Open
                                    2      3

  Note: Designated pins should be in the closed position. Settings are
  with clock generator installed on U8.

                       CPU SPEED SELECTION (PENTIUM)

  Speed      Clock    Multiplier    JP4    JP5     S1       S2       S3
            speed

  75MHz     50MHz        1.5x       1 &    1 &   Closed    Closed   Open
                                    2      2

  90MHz     60MHz        1.5x       1 &    1 &   Closed    Open     Open
                                    2      2

  100MHz    66MHz        1.5x       1 &    1 &    Open     Open     Open
                                    2      2

  120MHz    60MHz         2x        1 &    2 &   Closed    Open     Open
                                    2      3

  133MHz    66MHz         2x        1 &    2 &    Open     Open     Open
                                    2      3

  150MHz    60MHz        2.5x       2 &    2 &   Closed    Open     Open
                                    3      3

  166MHz    66MHz        2.5x       2 &    2 &    Open     Open     Open
                                    3      3

  180MHz    60MHz         3x        2 &    1 &   Closed    Open     Open
                                    3      2

  200MHz    66MHz         3x        2 &    1 &    Open     Open     Open
                                    3      2

  Note: Designated pins should be in the closed position. Settings are
  with clock generator installed on U8.

                     CPU SPEED SELECTION (PENTIUM MMX)

  Speed      Clock    Multiplier    JP4    JP5      S1       S2      S3
             speed

  150MHz     60MHz       2.5x        2 &    2 &   Closed    Open    Open
                                     3      3

  166MHz     66MHz       2.5x        2 &    2 &    Open     Open    Open
                                     3      3

  180MHz     60MHz        3x         2 &    1 &   Closed    Open    Open
                                     3      2

  200MHz     66MHz        3x         2 &    1 &    Open     Open    Open
                                     3      2

  Note: Designated pins should be in the closed position. Settings are
  with clock generator installed on U8.

                  ALTERNATE CPU SPEED SELECTION (CX 6X86)

  Speed     Clock    Multiplier    JP4   JP5     S1        S2       S3
            speed

  120MHz    50MHz        2x        1 &   2 &    Closed   Closed   Closed
                                   2      3

  133MHz    55MHz        2x        1 &   2 &    Closed   Closed    Open
                                   2      3

  150MHz    60MHz        2x        1 &   2 &    Closed    Open     Open
                                   2      3

  166MHz    66MHz        2x        1 &   2 &    Open      Open     Open
                                   2      3

  200MHz    66MHz       2.5x       1 &   2 &    Open     Closed    Open
                                   2      3

  Note: Designated pins should be in the closed position. Settings are
  with clock generator installed on U7.

                   ALTERNATE CPU SPEED SELECTION (AM K5)

  Speed     Clock    Multiplier    JP4   JP5     S1        S2       S3
            speed

  75MHz     50MHz       1.5x       1 &   1 &    Closed   Closed   Closed
                                   2      2

  90MHz     60MHz       1.5x       1 &   1 &    Closed    Open     Open
                                   2      2

  100MHz    66MHz       1.5x       1 &   1 &    Open      Open     Open
                                   2      2

  120MHz    60MHz        2x        1 &   1 &    Closed    Open     Open
                                   2      2

  133MHz    66MHz        2x        1 &   1 &    Open      Open     Open
                                   2      2

  150MHz    60MHz       2.5x       1 &   2 &    Closed    Open     Open
                                   2      3

  166MHz    66MHz       2.5x       1 &   2 &    Open      Open     Open
                                   2      3

  Note: Designated pins should be in the closed position. Settings are
  with clock generator installed on U7.

                  ALTERNATE CPU SPEED SELECTION (PENTIUM)

  Speed     Clock    Multiplier    JP4   JP5     S1        S2       S3
            speed

  75MHz     50MHz       1.5x       1 &   1 &    Closed   Closed   Closed
                                   2      2

  90MHz     60MHz       1.5x       1 &   1 &    Closed    Open     Open
                                   2      2

  100MHz    66MHz       1.5x       1 &   1 &    Open      Open     Open
                                   2      2

  120MHz    60MHz        2x        1 &   2 &    Closed    Open     Open
                                   2      3

  133MHz    66MHz        2x        1 &   2 &    Open      Open     Open
                                   2      3

  150MHz    60MHz       2.5x       2 &   2 &    Closed    Open     Open
                                   3      3

  166MHz    66MHz       2.5x       2 &   2 &    Open      Open     Open
                                   3      3

  180MHz    60MHz        3x        2 &   1 &    Closed    Open     Open
                                   3      2

  200MHz    66MHz        3x        2 &   1 &    Open      Open     Open
                                   3      2

  Note: Designated pins should be in the closed position. Settings are
  with clock generator installed on U7.

                ALTERNATE CPU SPEED SELECTION (PENTIUM MMX)

  Speed      Clock    Multiplier    JP4    JP5      S1       S2      S3
             speed

  150MHz     60MHz       2.5x        2 &    2 &   Closed    Open    Open
                                     3      3

  166MHz     66MHz       2.5x        2 &    2 &    Open     Open    Open
                                     3      3

  180MHz     60MHz        3x         2 &    1 &   Closed    Open    Open
                                     3      2

  200MHz     66MHz        3x         2 &    1 &    Open     Open    Open
                                     3      2

  Note: Designated pins should be in the closed position. Settings are
  with clock generator installed on U7.

                      CPU VOLTAGE SELECTION (SINGLE)

  Voltage           Q2            JP3        S4         S5         S6

    3.4v       2 transistors    Closed       N/A        N/A        N/A
                installed

    3.4v       1 transistor     Closed     Closed     Closed     Closed
                installed

    3.5v       2 transistors     Open        N/A        N/A        N/A
                installed

    3.5v       1 transistors     Open      Closed     Closed     Closed
                installed

                       CPU VOLTAGE SELECTION (DUAL)

  Voltage    Vcore          Q2            JP3       S4      S5       S6

    3.4v      2.9v     2 transistors    Closed     Open    Open     Open
                         installed

