Hardware Installation
2-18
2.4 Configuring the System Memory
Pin1
The DIMM types supported are SDRAM
(Synchronous DRAM) and Registered
SDRAM. This mainboard has three 168 pin
DIMM sockets (Dual-in-line Memory Module)
that allow you to install system memory up
to 768MB. But note that mixing SDRAM and
Registered SDRAM is not allowed, you can
install one of the DRAM types only.
Warning: This motherboard does not support EDO
DRAM.
DIMM modules can be identified by following factors:
I. Size: single side, 1Mx64 (8MB), 2Mx64 (16MB), 4Mx64 (32MB), 8Mx64
(64MB), 16Mx64 (128MB), and double side, 1Mx64x2 (16MB), 2Mx64x2
(32MB), 4Mx64x2 (64MB), 8Mx64x2 (128MB).
Tip: Here is a trick to check if your DIMM is
single-side or double-side -- if there are traces
connected to golden finger pin 114 and pin 129 of
the DIMM, the DIMM is probably double-side;
otherwise, it is single-side. Following figure is for
your reference.
168
Pin 129
Pin 114
Note: 768MB memory is achieved by using 128M bit
Registered SDRAMs.
II. Speed: Normally marked as -12, which means the clock cycle time is 12ns
and maximum clock of this SDRAM is 83MHz. Sometimes you can also find
the SDRAM marked as -67, which means maximum clock is 67MHz.
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