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Installation
Memory Installation
The VIA P4PB 266E mainboard provides 3 sockets for 184-pin, 2.5V DDR
DIMM modules with 6 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
sockets (DDR 1~3).
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. Conven-
tional 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). Two types of DDR are available currently:
PC1600 & PC2100. PC1600 DDR SDRAM running at 100MHz will produce
about 1.6GB/s memory bandwidth. 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.
Socket 478
266E
DDR DIMM Sockets
(DDR 1~3)
2-5
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