19
Install Memory Modules
This mainboard accommodates 184-pin 2.5V unbuffered
Double Data Rate (DDR) SDRAM memory modules. The
memory chips must be standard or registered SDRAM (Syn-
chronous Dynamic Random Access Memory).
This mainboard is capable of auto detecting the type of mem-
ory modules (DDR SDRAM) you have installed and then
automatically adjusting the voltage to the appropriate level.
Note: This mainboard only supports up to 2 unbuffered
DDR333 DIMM
The memory bus can run at 100 MHz or 133 MHz. If your
processor operates over a 100 MHz system bus, you can in-
stall PC200 or PC266 memory modules that operate over a
100 MHz or 133 MHz memory bus. If your processor operates
over a 133 MHz system bus, you can only install PC266 or
PC333 memory modules that operate over a 133 MHz or 166
MHz memory bus.
Note: SDRAM provides 800 MB/s or 1 GB/s data transfer
depending on whether the bus is 100MHz or
133MHz. Double Data Rate SDRAM (DDR
SDRAM) doubles the rate to 1.6 GB/s or 2.1 GB/s
or 2.7 GB/s at memory bus 100 Mhz or 133 MHz or
166 MHz. DDR SDRAM uses additional power and
ground lines and requires 184-pin DIMM modules
rather than the 168-pin DIMMs used by SDRAM.