1-18 Technical Information
The memory configuration consists of four sockets. The DIMM memory sockets accept
168-pin, 64-bit (non-parity) 16-, 32-, 64-, and 128-MB SDRAM DIMMs (64-MB and
128-MB as available) and 256-MB EDO DIMMs (as available). Table 1-5 lists the
supported DIMMs.
Table 1-5 Memory Configurations
DIMM Size
Type
Configuration
Technology
16 MB
CAS Latency 2 SDRAM
2-Mbit x 64-bit
16 Mbit
32 MB
CAS Latency 2 SDRAM
4-Mbit x 64-bit
16 Mbit
64 MB
CAS Latency 2 SDRAM
8-Mbit x 64-bit
64 Mbit
128 MB
CAS Latency 2 SDRAM
16-Mbit x 64-bit
64 Mbit
256 MB
EDO DRAM only
32 Mbit x 72/64
64 Mbit
Memory can be installed in one, two, three, or four sockets. Memory type, size, and speed
can vary between sockets, so EDO and SDRAM DIMMs can be installed on the same
system board.
Memory upgrades are easy with DIMM modules. Advantages of using DIMMs include:
DIMMs do not need to be installed in pairs on the system board.
DIMMs of different memory types and sizes can be installed on the same board.
No switches or jumpers need to be set if the memory is changed.
System BIOS automatically detects the DIMMs.
See “DIMM Upgrade” in Section 3 for DIMM installation procedures.
SDRAM
Synchronous DRAM (SDRAM) improves memory performance through memory access
that is synchronous with the memory clock. This simplifies the timing design and increases
memory speed because all timing is dependent on the number of memory clock cycles.
NOTE:
To function properly, SDRAM DIMMs
used on the system board must meet the Intel
4-clock, 66 MHz, unbuffered SDRAM
specification (version 1.0) and support CAS
Latency 2 for 64- or 72-bit SDRAM.