Hardware Setup
2-5
The mainboard provides 2 slots for 184-pin, 2.5V unbuffered DDR DIMM
with 4 memory banks. You can install PC1600/PC2100 DDR/PC2700 SDRAM
modules on the DDR DIMM slots (DDR 1~2). To operate properly, at least one
DIMM module must be installed.
Memory
Introduction to DDR SDRAM
DDR (Double Data Rate) SDRAM is similar to conventional SDRAM, but
doubles the rate by transferring data twice per cycle. It uses 2.5 volts as op-
posed to 3.3 volts used in SDR SDRAM, and requires 184-pin DIMM modules
rather than 168-pin DIMM modules used by SDR SDRAM. Three types of
DDR SDRAM are available at the time of writing: PC1600, PC2100 and PC2700.
The following table shows the clock and peak bandwidth of each type of
DDR SDRAM module:
PC2700 PC2100 PC1600
(DDR333) (DDR266) (DDR200)
Clock 166MHz 133MHz 100MHz
Peak
Bandwidth 2666MB/s 2133MB/s 1600MB/s
DDR DIMM Slots
