
EFA CORPORATION

P5TX-ATX

Device Type          Mainboard
Processor            CX 6X86/CX 6X86L/CX 686MX/AM K5/AM K6/Pentium/Pentium
                     MMX
Processor Speed      90/100/120/133/150/166/200/233MHz
Chip Set             Intel
Video Chip Set       None
Maximum Onboard      256MB (EDO & SDRAM supported)
Memory
Maximum Video Memory None
Cache                256/512KB
BIOS                 Award
Dimensions           305mm 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, ATX power connector
NPU Options          None

[Image]

                                CONNECTIONS

  Purpose               Location         Purpose             Location

  ATX power               ATX            Power LED &          J15/pins
  connector                              keylock            2/4/6/8/10

  Serial port 2           CN1            Turbo LED         J15/pins 11 &
                                                                12

  Parallel port           CN2            Green PC          J15/pins 13 &
                                         connector              14

  PS/2 mouse              CN3            IDE interface     J15/pins 15 &
  port                                   LED                    16

  Serial port 1           CN4            Reset switch      J15/pins 17 &
                                                                18

  IDE interface           CN5            Green PC LED      J15/pins 19 &
  2                                                             20

  IDE interface           CN6            IR connector           J19
  1

  Floppy drive            CN7            External               J20
  interface                              battery

  Soft off power           J5            32-bit PCI          PC1  PC4
  supply                                 slots

  Speaker           J15/pins1/3/5/7      USB connector          USB

  Note: The location of J9 & J15 is unidentified.

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not           JP3          Unidentified
      alter

     Factory configured - do not           JP8          Unidentified
      alter

     CMOS memory normal operation          JP9        Pins 1 & 2 closed

      CMOS memory clear                     JP9        Pins 2 & 3 closed

     Factory configured - do not          JP11          Unidentified
      alter

              SIMM 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

  Note: Board accepts EDO memory.

               DIMM CONFIGURATION

      Size          Bank 2          Bank 3

      8MB         (1) 1M x 64        None

      16MB        (1) 2M x 64        None

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

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

      32MB        (1) 4M x 64        None

      32MB        (1) 2M x 64     (1) 2M x 64

      40MB        (1) 4M x 64     (1) 1M x 64

      48MB        (1) 4M x 64     (1) 2M x 64

      64MB        (1) 8M x 64        None

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

      72MB        (1) 8M x 64     (1) 1M x 64

      80MB        (1) 8M x 64     (1) 2M x 64

      96MB        (1) 8M x 64     (1) 4M x 64

     128MB       (1) 16M x 64        None

     128MB        (1) 8M x 64     (1) 8M x 64

     136MB       (1) 16M x 64     (1) 1M x 64

     144MB       (1) 16M x 64     (1) 2M x 64

     160MB       (1) 16M x 64     (1) 4M x 64

     192MB       (1) 16M x 64     (1) 8M x 64

     256MB       (1) 16M x 64    (1) 16M x 64

            Note: Board accepts SDRAM memory.

      CACHE CONFIGURATION

      Size          Bank 0

     256KB       (2) 32K x 32

     512KB       (2) 64K x 32

                       CPU SPEED SELECTION (CX 6X86)

    CPU       Clock     Multiplier    JP4     JP5      JP6         JP7
   speed     speed

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

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

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

  Note: Pins designated should be in the closed position.

                      CPU SPEED SELECTION (CX 6X86L)

     CPU       Clock     Multiplier     JP4      JP5      JP6       JP7
   speed       speed

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

  Note: Pins designated should be in the closed position.

                      CPU SPEED SELECTION (CX 6X86MX)

    CPU        Clock     Multiplier     JP4     JP5       JP6       JP7
   speed      speed

  166MHz      60MHz         2.5x       2 & 3   2 & 3    Closed      Open

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

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

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (AM K5)

    CPU        Clock     Multiplier     JP4     JP5       JP6       JP7
   speed      speed

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

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

  120MHz      60MHz         1.5x       1 & 2   1 & 2    Closed      Open

  133MHz      66MHz         1.5x       1 & 2   1 & 2     Open       Open

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

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

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (AM K6)

     CPU       Clock     Multiplier     JP4      JP5      JP6       JP7
   speed       speed

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

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

   233MHz      66MHz        3.5x        1 & 2   1 & 2    Open      Open

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (INTEL)

    CPU        Clock     Multiplier     JP4     JP5       JP6       JP7
   speed      speed

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

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

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

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

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

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

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

  Note: Pins designated should be in the closed position.

                      CPU SPEED SELECTION (INTEL MMX)

     CPU       Clock     Multiplier     JP4      JP5      JP6       JP7
   speed       speed

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

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

   233MHz      66MHz        3.5x        1 & 2   1 & 2    Open      Open

  Note: Pins designated should be in the closed position.

                           CPU VOLTAGE SELECTION

    Voltage        JP1        JP12        JP13        JP14        JP15

     2.0v           *        1 & 2       1 & 2       1 & 2        1 & 2

     2.5v           *        2 & 3       1 & 2       2 & 3        1 & 2

     2.8v        3 & 5, 4    1 & 2       1 & 2       1 & 2        2 & 3
                   & 6

     2.9v        3 & 5, 4    2 & 3       1 & 2       1 & 2        2 & 3
                   & 6

     3.2v        3 & 5, 4    1 & 2       1 & 2       2 & 3        2 & 3
                   & 6

     3.3v        1 & 3, 2    2 & 3       1 & 2       2 & 3        2 & 3
                   & 4

     3.4v           *        1 & 2       2 & 3       2 & 3        2 & 3

     3.52v       1 & 3, 2    2 & 3       2 & 3       2 & 3        2 & 3
                   & 4

  Note: Pins designated should be in the closed position. * = Reserved
  for future CPUs.

