
ACER, INC.

AX53

Device Type          Mainboard
Processor            CX 6X86/AM K5/AM K6/Pentium/Pentium MMX
Processor Speed      75/90/100/120/133/150/166/200MHz
Chip Set             Intel
Video Chip Set       None
Maximum Onboard      512MB (EDO & SDRAM supported)
Memory
Maximum Video Memory None
Cache                256/512KB
BIOS                 AMI
Dimensions           284mm x 208mm
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), cache slot, IR
                     connector, USB connector, ATX power connector
NPU Options          None

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                Location

  ATX power connector       ATX       IDE interface LED        CN13

  Serial port 2             C1        USB connector            CN14

  Parallel port             C2        Power LED &         CN15/pins 1 - 5
                                      keylock

  PS/2 mouse port           C3        Speaker              CN15/pins 7 -
                                                                10

  Serial port 1             CN1       Green PC LED         CN15/pins 12 &
                                                                13

  CPU fan power             CN5       Green PC            CN15/pins 15 -
                                      connector           17

  Floppy drive              CN6       Reset switch        CN15/pins 19 &
  interface                                               20

  IDE interface 2           CN9       32-bit PCI slots       PC1 - PC4

  IDE interface 1          CN10       Cache slot                SL1

  IR connector             CN12

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     ATX power supply enabled              JP1        Pins 2 & 3 closed

      ATX power supply disabled             JP1        Pins 1 & 2 closed

     CMOS memory normal operation          JP9        Pins 1 & 2 closed

      CMOS memory clear                     JP9        Pins 2 & 3 closed

     On board I/O enabled                 JP12        Pins 1 & 2 closed

      On board I/O disabled                JP12        Pins 2 & 3 closed

     Factory configured - do not          JP13          Unidentified
      alter

     PS/2 mouse enabled                   JP14             Closed

      PS/2 mouse disabled                  JP14              Open

     Keyboard clock select ISA            JP15        Pins 1 & 2 closed
      clock

      Keyboard clock select 12MHz          JP15        Pins 3 & 4 closed

             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

          SIMM CONFIGURATION (CON'T)

      Size          Bank 0          Bank 1

      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

     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

          Size                   Bank 0                     SL1

          256KB               (2) 32K x 32             Not installed

          512KB               (2) 32K x 32        256KB module installed

        CACHE JUMPER CONFIGURATION

        Size                 JP7

        256KB         Pins 1 & 2 closed

        512KB         Pins 2 & 3 closed

         CACHE MODULE CONFIGURATION

         Type                 JP16

   Module with TAG      Pins 2 & 3 closed

  Module without TAG    Pins 1 & 2 closed

                       CPU SPEED SELECTION (CX 6X86)

    CPU        Clock     Multiplier     JP2      JP4       JP5      JP8
   speed      speed

  120MHz      50MHz          2x         Open    1 & 2,    Open     1 & 2,
                                                3 & 4,             3 & 4
                                                5 & 6

  133MHz      55MHz          2x         Open    1 & 2,    Open     Open
                                                3 & 4,
                                                5 & 6

  150MHz      60MHz          2x         Open    1 & 2,    Open     1 & 2
                                                3 & 4,
                                                5 & 6

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (AM K5)

     CPU       Clock     Multiplier     JP2      JP4       JP5      JP8
   speed       speed

   75MHz       50MHz        1.5x        1 & 2   1 & 2,    Open     1 & 2,
                                                3 & 4,             3 & 4
                                                5 & 6

   90MHz       60MHz        1.5x        1 & 2   1 & 2,    Open     1 & 2
                                                3 & 4,
                                                5 & 6

   100MHz      66MHz        1.5x        1 & 2   1 & 2,    Open     3 & 4
                                                3 & 4,
                                                5 & 6

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (INTEL)

     CPU       Clock     Multiplier     JP2       JP4      JP5      JP8
   speed       speed

   75MHz       50MHz        1.5x         1 &     1 & 2,    Open    1 & 2,
                                        2, 3     3 & 4,            3 & 4
                                        & 4      5 & 6

   90MHz       60MHz        1.5x         1 &     1 & 2,    Open    1 & 2
                                        2, 3     3 & 4,
                                        & 4      5 & 6

   100MHz      66MHz        1.5x         1 &     1 & 2,    Open    3 & 4
                                        2, 3     3 & 4,
                                        & 4      5 & 6

   120MHz      60MHz         2x          3 &     1 & 2,    Open    1 & 2
                                        4, 5     3 & 4,
                                        & 6      5 & 6

   133MHz      66MHz         2x          3 &     1 & 2,    Open    3 & 4
                                        4, 5     3 & 4,
                                        & 6      5 & 6

   150MHz      60MHz        2.5x         5 &     1 & 2,    Open    1 & 2
                                        6, 7     3 & 4,
                                        & 8      5 & 6

   166MHz      66MHz        2.5x         5 &     1 & 2,    Open    3 & 4
                                        6, 7     3 & 4,
                                        & 8      5 & 6

   200MHz      66MHz         3x          1 &     1 & 2,    Open    3 & 4
                                        2, 7     3 & 4,
                                        & 8      5 & 6

  Note: Pins designated should be in the closed position.

                      CPU SPEED SELECTION (INTEL MMX)

     CPU       Clock      Multiplier     JP2      JP4      JP5      JP8
   speed       speed

   150MHz      60MHz         2.5x         5 &     Open      1 &    1 & 2
                                         6, 7              2, 3
                                         & 8               & 4

   166MHz      66MHz         2.5x         5 &     Open      1 &    3 & 4
                                         6, 7              2, 3
                                         & 8               & 4

   200MHz      66MHz          3x          1 &     Open      1 &    3 & 4
                                         2, 7              2, 3
                                         & 8               & 4

  Note: Pins designated should be in the closed position.

                      CPU VOLTAGE SELECTION (SINGLE)

                Voltage                                JP6

                  3.45v                        Pins 1 & 2 closed

                   3.52v                        Pins 3 & 4 closed

                       CPU VOLTAGE SELECTION (DUAL)

                V core                                 JP3

                   2.5v                        Pins 11 & 12 closed

                   2.7v                        Pins 9 & 10 closed

                   2.8v                         Pins 7 & 8 closed

                   2.9v                         Pins 5 & 6 closed

                  3.43v                        Pins 3 & 4 closed

                   3.52v                        Pins 1 & 2 closed

