Installation
2-5
The VIA P4MA mainboard provides 2 sockets for 184-pin, 2.5V DDR DIMM
modules with 4 memory banks. To operate properly, at least one DIMM module
must be installed.
You can install PC1600/PC2100 DDR SDRAM modules on the DDR DIMM
slots (DDR 1~2).
DDR (Double Data Rate) SDRAM is similar to conventional SDRAM, but
doubles the rate of transfer by transfering data twice per cycle. This is achieved
by transfering data on both the rising and falling edges of the clock.
Conventional SDRAM only uses the rising edge of the clock to transfer data.
Therefore, conventional SDRAM is called SDR (Single Data Rate) SDRAM.
DDR SDRAM uses 2.5 volts as opposed to 3.3 volts used in SDR SDRAM, and
requires 184-pin DIMM modules rather than 168-pin DIMM modules used by
SDR SDRAM. DDR SDRAM is also known as SDRAM-II, DDR DRAM and
DSDRAM (Double-Speed DRAM). PC2100 running at 133MHz will produce
2.1GB/s memory bandwidth. High memory bandwidth makes DDR an ideal
solution for high performance PC, workstations and servers.
Memory Installation
Socket 478
M
DDR DIMM Slots
(DDR 1~2)
