User`s manual

2: Mainboard Installation

Install Memory

This mainboard accommodates 168-pin 3.3V/184-pin 2.5V

unbuffered SDRAM/DDR SDRAM (Double Data Rate SDRAM)

memory modules. The memory chips must be standard or

registered SDRAM (Synchronous Dynamic Random Access

Memory).

You must install at least one memory module in order to work the

mainboard, either SDRAM or DDR SDRAM, but you cannot

work them simultaneously.

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 reather than the 168-pin 3.3V unbuffered DIMMs

used by SDRAM.

DDR1

DDR2

SDR1

SDR2