
PC CHIPS MAUNFACTURING, LTD.

M725

Device Type              Mainboard
Processor                Pentium II
Processor Speed          233/266/300/333MHz
Chip Set                 Intel
Maximum Onboard Memory   384MB (EDO & SDRAM supported)
Cache                    256/512KB (located on the Pentium II CPU)
BIOS                     AMI
Dimensions               220mm x 220mm
I/O Options              32-bit PCI slots (3), floppy drive interface, IDE
                         interfaces (2), parallel port, PS/2 mouse port,
                         PS/2 mouse interface, serial ports (2), ATX power
                         connector, AGP slot, audio in  CD-ROMs (2)

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose               Location

  AGP slot                  AGP        Sound and Game           J3
                                       Header

  ATX power connector       ATX        ATX form card            J4
                                       connector

  Audio in  CD-ROM         CD1        Speaker             J5/pins 1, 3,
                                                               5, 7

  Audio in  CD-ROM         CD2        Power LED &         J5/pins 2, 4,
                                       keylock               6, 8, 10

  Serial port 1            COM1        Turbo LED          J5/pins 13 & 14

  Serial port 2            COM2        IDE interface LED  J5/pins 15 & 16

  CPU fan power            FAN1        Reset switch       J5/pins 17 & 18

  Floppy drive             FDC1        Green PC LED       J5/pins 19 & 20
  interface

  IDE interface 1          IDE1        32-bit PCI slots      PC1 - PC3

  IDE interface 2          IDE2        Parallel port           PRN1

  Digital audio out         J1         PS/2 mouse               PS1
                                       interface

  Digital audio in          J2         PS/2 mouse port          PS2

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Sound pro enabled                       JP1           Pins 2 & 3
                                                              closed

      Sound pro disabled                      JP1           Pins 1 & 2
                                                              closed

     Microphone type select standard         JP2              Open

      Microphone type select special          JP2             Closed

     CMOS memory normal operation            JP10          Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP10          Pins 2 & 3
                                                              closed

                DIMM CONFIGURATION

    Size        Bank 0       Bank 1      Bank 2

    8 MB       1 M x 64       None        None

    16 MB      1 M x 64     1 M x 64      None

    16 MB      2 M x 64       None        None

    24 MB      1 M x 64     1 M x 64    1 M x 64

    32 MB      2 M x 64     2 M x 64      None

    32 MB      4 M x 64       None        None

    40 MB      2 M x 64     2 M x 64    1 M x 64

    48 MB      2 M x 64     2 M x 64    2 M x 64

    64 MB      4 M x 64     4 M x 64      None

    64 MB      8 M x 64       None        None

    80 MB      4 M x 64     4 M x 64    2 M x 64

    96 MB      4 M x 64     4 M x 64    4 M x 64

   128 MB      8 M x 64     8 M x 64      None

   128 MB     16 M x 64       None        None

   130 MB      8 M x 64     8 M x 64    4 M x 64

   192 MB      8 M x 64     8 M x 64    8 M x 64

   256 MB     16 M x 64    16 M x 64      None

   320 MB     16 M x 64    16 M x 64    8 M x 64

   384 MB     16 M x 64    16 M x 64    16 M x 64

                        DIMM VOLTAGE CONFIGURATION

         Voltage                    JP5A                    JP5B

            3.3v            Pins 2 & 3 closed        Pins 2 & 3 closed

              5v             Pins 1 & 2 closed        Pins 1 & 2 closed

                 CACHE CONFIGURATION

  Note: The cache is located on the Pentium II CPU.

         CPU FREQUENCY SELECTION

      Frequency              JP7

        66MHz         Pins 2 & 3 closed

                         CPU MULTIPLIER SELECTION

  Multiplier       JP3A           JP3B           JP3C            JP3D

     1.5x          Open           Open          Closed           Open

      2x          Closed         Closed         Closed          Closed

      2x           Open           Open           Open            Open

     2.5x          Open          Closed         Closed          Closed

      3x          Closed         Closed          Open           Closed

     3.5x          Open          Closed          Open           Closed

      4x          Closed         Closed         Closed           Open

     4.5x          Open          Closed         Closed           Open

      5x          Closed         Closed          Open            Open

     5.5x          Open          Closed          Open            Open

      6x          Closed          Open          Closed          Closed

     6.5x          Open           Open          Closed          Closed

      7x          Closed          Open           Open           Closed

     7.5x          Open           Open           Open           Closed

      8x          Closed          Open          Closed           Open

