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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 133 MHz system bus.
DDR SDRAM provides 800 MBps or 1 GBps data transfer depending on
whether the bus is 100 MHz or 133 MHz. It doubles the rate to 1.6 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:
4.
Install the DIMM module into
the slot and press it firmly
down until it seats correctly.
The slot latches are levered
upwards and latch on to the
edges of the DIMM.
5.
Install any remaining DIMM
modules.
Latch
Cutout
Notch
Latch
13
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