Installing Memory Modules - ECS L4S8A Manual

Installing Memory Modules

This mainboard accommodates three 184-pin 2.5V unbuffered Double Data
Rate (DDR) SDRAM memory modules. The memory chips must be standard
or registered SDRAM (Synchronous Dynamic Random Access Memory). The
memory bus can run up to 166 MHz.
When you installed DDR333 memory modules, the memory bus can run up to
166 MHz. If you have DDR266, this can operate over a 133 MHz. For
DDR200, it can only run up to 100 MHz.
Note: SDRAM provides 800 MBps or 1 GBps data transfer depending on
whether the bus is 100MHz or 133MHz. Double Data Rate SDRAM
(DDR SDRAM) doubles the rate to 1.6 GBps and 2.1 GBps. DDR
SDRAM uses additional power and ground lines and requires 184-pin
DIMM modules rather than the 168-pin DIMMs used by SDRAM.
The mainboard accommodates three memory modules. You must install at
least one module in any of the three slots. Each module can be installed with
32 MB to 1 GB of memory; total memory capacity is 3 GB.
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.
Installation Procedure
Refer to the following to install the memory modules.
1. This mainboard supports unbuffered DDR SDRAM only. Do not attempt to
insert any other type of DDR SDRAM into the slots.
2. Push the latches on each side of the DIMM slot down.
3. 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 in-
stalled correctly.
4. Check that the cutouts on the
DIMM module edge connector
match the notches in the
DIMM slot.
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