21
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 Dy-
namic 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.
You must install at least one memory module in order to use
the mainboard, and
you can only use one of the both
SDRAM and DDR SDRAM at the same time
.
DDR SDRAM provides 800 MBps or 1 GBps data transfer de-
pending 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