EPOX COMPUTER CO., LTD.

P55-VX

Processor           CX M1/AM K5/Pentium
Processor Speed     75/90/100/120/133/150/166/180/200MHz
Chip Set            Intel
Video Chip Set      None
Maximum Onboard     128MB (EDO supported)
Memory
Maximum Video       None
Memory
Cache               256/512KB
BIOS                Award
Dimensions          225mm x 220mm
I/O Options         32-bit PCI slots (4), floppy drive interface, green PC
                    connector, IDE interfaces (2), parallel port, PS/2
                    mouse interface, serial ports (2), IR connector, USB
                    connector
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  Serial port 2            CN1         Chassis fan power         J3

  Serial port 1            CN2         Power LED &          J4 pins 1 - 5
                                       keylock

  Parallel port            CN3         Speaker               J4 pins 7 -
                                                                 10

  Floppy drive             CN4         Reset switch          J4 pins 12 &
  interface                                                      13

  IDE interface 2          CN5         Turbo LED             J4 pins 15 &
                                                                 16

  IDE interface 1          CN6         Green PC connector    J4 pins 18 &
                                                                 19

  USB connector            CN8         Green PC LED          J4 pins 21 &
                                                                 22

  PS/2 mouse                J1         IDE interface LED     J4 pins 24 &
  interface                                                      25

  IR connector              J2         32-bit PCI slots       PC1 - PC4

                        USER CONFIGURABLE SETTINGS

                Function                     Label          Position

      Flash BIOS voltage select 12v           JP2           Pins 2 & 3
                                                             closed

      Flash BIOS voltage select 5v            JP2           Pins 1 & 2
                                                             closed

                            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) 1M x 36              (2) 2M x 36

          32MB                 (2) 4M x 36                  None

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

          40MB                 (2) 1M x 36              (2) 4M 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) 2M x 36              (2) 8M x 36

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

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

  Note: Board accepts EDO memory. Board also accepts x 32 SIMMs. Banks
  are interchangeable.

                       CACHE CONFIGURATION

         Size                Bank 0                  TAG

        256KB             (2) 32K x 32       (1) 8K/16K/32K x 8

        512KB             (2) 64K x 32         (1) 16K/32K x 8

                        CPU SPEED SELECTION (CYRIX)

    CPU       Clock    Multiplier      JP7        JP8      JP9     JP10
   speed     speed

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

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

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

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

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (INTEL)

    CPU       Clock    Multiplier      JP7        JP8      JP9     JP10
   speed     speed

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

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

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

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

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

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

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

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

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

  Note: Pins designated should be in the closed position.

                            CPU TYPE SELECTION

       Type               JP5A              JP5B               JP5C

       CX M1           Pins 1 & 2         Pins 1 & 2        Pins 1 & 2
                         closed            closed             closed

       AM K5           Pins 1 & 2         Pins 1 & 2        Pins 1 & 2
                         closed            closed             closed

     P54C/CTB          Pins 1 & 2         Pins 1 & 2        Pins 1 & 2
                         closed            closed             closed

       P55C            Pins 2 & 3         Pins 2 & 3        Pins 2 & 3
                         closed            closed             closed

          CPU VOLTAGE SELECTION

       Voltage               JP4

        2.5v          Pins 1 & 2 closed

        2.8v          Pins 2 & 3 closed