Installing Memory Modules - ECS P4S5A Manual

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Installing Memory Modules

This mainboard accommodates 168-pin 3.3V/184-pin 2.5V unbuffered
SDRAM memory modules. The memory chips must be standard or registered
SDRAM (Synchronous Dynamic Random Access Memory).
The CPU supports 100MHz system bus. The SDRAM DIMMs and DDRs can
synchronously work with 100 MHz or operates over a 333 MHz system bus.
DDR SDRAM provides 800 MBps or 1 GBps data transfer depending on
whether the bus is 100 MHz or 333 MHz. It doubles the rate to 1.0 GBps and
2.1 GBps by transferring data on both the rising and falling edges of the clock.
DDR SDRAM uses additional power and ground lines and requires 184-pin
2.5V unbuffered DIMM module rather than the 168-pin 3.3V unbuffered
DIMMs used by SDRAM.
Installation Procedure
You must install at least one memory
module in order to use the main-
board, and you can only use one of
the both SDRAM and DDR SDRAM
at the same time.
Refer to the following to install the memory modules.
1.
Push the latches on each side of the DIMM slot down.
2.
Align the memory module with the slot. The DIMM slots are keyed with
notches and the DIMMs are keyed with cutouts so that they can only be
installed correctly.
3.
Check that the cutouts on the DIMM module edge connector match the
notches in the DIMM slot:
13

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