AMERICAN MEGATRENDS, INC.

ATLAS PCI-III

Device Type         Mainboard
Processor           AM K5/AM K6/Pentium
Processor Speed     75/90/100/120/133/150/166/180/200MHz
Chip Set            Intel
Video Chip Set      None
Maximum Onboard     256MB (EDO supported)
Memory
Maximum Video       None
Memory
Cache               256/512KB
BIOS                AMI
Dimensions          330mm x 218mm
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), VRM connector, USB
                    connectors (2)
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  CPU fan power              J13       IDE interface 1             P5

  Reset switch               J20       Power connector             P6

  IDE interface LED          J21       Auxiliary power             P8
                                       connector

  Green PC connector         J22       IDE interface 2             P9

  Speaker                    J23       32-bit PCI slots         PC1 – PC4

  Power LED & keylock        J24       PS/2 mouse interface       PS2

  Serial port 1               P1       USB connector 1            USB1

  Serial port 2               P2       USB connector 2            USB2

  Floppy drive interface      P3       VRM connector              VRM

  Parallel port               P4

                        USER CONFIGURABLE SETTINGS

                Function                      Label          Position

  »   Factory configured - do not alter        J2             Closed

  »   Factory configured - do not alter        J3              Open

      PCI bus clock speed select               J15          Pins 1 & 2
      33MHz/66MHz                                             closed

      PCI bus clock speed select               J15          Pins 2 & 3
      25MHz/75MHz                                             closed

  »   CMOS memory normal operation             J18             Open

      CMOS memory clear                        J18            Closed

      PS/2 mouse IRQ12 enabled                 J19          Pins 2 & 3
                                                              closed

      PS/2 mouse IRQ12 disabled                J19          Pins 1 & 2
                                                              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

      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

          SIMM CONFIGURATION (CON’T)

      Size          Bank 0          Bank 1

     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.

                        CACHE CONFIGURATION

      Size            Bank 0           Bank 1            TAG

      256KB        (2) 32K x 32         None         (1) 32K x 8

      512KB        (2) 32K x 32     (2) 32K x 32     (1) 32K x 8

  Note: The location of banks 0 & 1 and the TAG is unidentified.

                 CACHE JUMPER CONFIGURATION

   Size       J1        J9        J10       J11       J12

  256KB      Open      1 & 2     1 & 2     1 & 2     1 & 2

  512KB     Closed     2 & 3     2 & 3     2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

                            CPU SPEED SELECTION

    CPU      Clock    Multiplier      J5        J6        J7        J8
  speed     speed

  75MHz     50MHz        1.5x       Closed    Closed     Open      Open

  90MHz     60MHz        1.5x       Closed     Open      Open      Open

  100MHz    50MHz        1.5x        Open     Closed     Open      Open

  120MHz    60MHz         2x        Closed     Open      Open     Closed

  133MHz    66MHz         2x         Open     Closed     Open     Closed

  150MHz    60MHz        2.5x       Closed     Open     Closed    Closed

  166MHz    66MHz        2.5x        Open     Closed    Closed    Closed

  180MHz    60MHz         3x        Closed     Open     Closed     Open

  200MHz    66MHz         3x         Open     Closed    Closed     Open

                           CPU VOLTAGE SELECTION

                 Voltage                                J14

  »        NO VRM module installed            Pins 1 & 2, 3 & 4, 5 & 6
                                                       closed

              2.8v VRM installed                        Open

              3.1v VRM installed                        Open