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Case B. You can add an extra jumper cap to change the external clock.
Extra jumper cap position
Force Ext. Clock to
RS1
83 MHz
RS2
66 MHz
RS3
75 MHz
For example: With a Pentium II 266 MHz CPU, one should put “only one” jumper cap onto the
location “266” on the JP2 and get the CPU to run at 66 MHz x 4. If you put an extra cap onto
location “RS3”, then the CPU will run at 75 MHz x 4.
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, Registered DIMM 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.
