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SDRAM provides 800 MB/s or 1 GB/s data transfer rate corresponding with
the bus 100 MHz or 133 MHz. It doubles the rate to 1.6 GB/s and 2.1 GB/s 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.
Do not remove any memory module from its antistatic packaging until
you are ready to install it on the mainboard. Handle the modules only by
their edges. Do not touch the components or metal parts. Always wear
a grounding strap when you handle the modules.
Note: You must install at least one memory module in order to work out this
mainboard, either SDRAM or DDR SDRAM, but you can't use them
simultaneously.
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:
Latch
Cutout
Notch
Latch
Latch
Cutouts
Notches
Latch
15
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