Dell 900 manual System clock or 100 MHz matches external bus speed

Table A-1. Technical Specifications (continued)

Expansion Bus (continued)

Expansion-card connectors . . . . . . . . . . . . supports two one-third–length PCI expansion cards

Expansion-card connector size . . . . . . . . . 120 pins

ACPI specification . . . . . . . . . . . . . . . . . . . 1.0a

Expansion-card connector data

width (maximum) . . . . . . . . . . . . . . . . . . . 32 bits

System Clock

System clock . . . . . . . . . . . . . . . . . . . . . . . 66 or 100 MHz (matches external bus speed)

Memory

Architecture . . . . . . . . . . . . . . . . . . . . . . . . non-ECC SDRAM 168-pin modules DIMM sockets. . . . . . . . . . . . . . . . . . . . . . two; gold contacts

DIMM capacities . . . . . . . . . . . . . . . . . . . . 32, 64, 128, and 256 MB Minimum RAM . . . . . . . . . . . . . . . . . . . . . 64 MB

Maximum RAM. . . . . . . . . . . . . . . . . . . . . 512 MB

Frequency . . . . . . . . . . . . . . . . . . . . . . . . . 100 MHz

Clock cycle . . . . . . . . . . . . . . . . . . . . . . . . 10 ns (supports 4 clocks only) CAS latency . . . . . . . . . . . . . . . . . . . . . . . . three

SPD revision . . . . . . . . . . . . . . . . . . . . . . . 1.2

Buffering . . . . . . . . . . . . . . . . . . . . . . . . . . unbuffered

Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 V

Data bus width . . . . . . . . . . . . . . . . . . . . . 64 bits

BIOS address . . . . . . . . . . . . . . . . . . . . . . F0000h

NOTE: The Glossary in the system Help defines abbreviations and acronyms.

A-2 Dell Dimension 900 System Reference and Troubleshooting Guide