18
233
266
300
333
Multiplier
RS0 RS1 External Clock
OFF OFF OFF OFF x 2
OFF OFF 68 MHz
ON
OFF ON
OFF x 2.5
ON
OFF 66 MHz
ON
ON
OFF OFF x 3
OFF ON
75 MHz
ON
OFF OFF OFF x 3.5
ON
ON
83 MHz
OFF ON
OFF OFF x 4
OFF OFF ON
OFF x 4.5
OFF OFF OFF ON
x 5
OFF OFF ON
ON
x 5.5
OFF ON
OFF ON
x 6
ON
OFF OFF ON
x 6.5
2.3.3 Main memory (DIMM0--3)
The motherboard has four dual inline memory module (DIMM) sockets, which supports memory
size from 8 MB to 512 MB with SDRAM and 1 GB with EDO DRAM. The Synchronous DRAM
(SDRAM) improves memory performance through memory access that is synchronous with the
memory clock. The Error Checking and Correcting (ECC) memory improves system security by
detecting and correcting error bit when accessing memory.
The motherboard supports the following memory features:
JEDEC MO-161 compliant 168-pin DIMMs with gold-plated contacts
3.3 V memory module only
ECC logic detects multiple-bit errors and corrects single-bit errors (SDRAM)
Unbuffered SDRAM or 60-ns 3.3 V EDO DIMMs
4 / 16 / 64 Mbit DRAM technology
Symmetrical and asymmetrical DRAM addressing
Single-sided or double-sided DIMMs
3.3 V EDO and SDRAM DIMMs can be installed on the same motherboard
Memory can be installed in DIMM sockets without any order restriction. The memory type, size,
speed can vary between sockets. The BIOS automatically detects memory type, size and speed.
Note 1. In order to reduce the loading, the total memory chip count installed on the system should
not exceed 72.
