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Installation
Memory Installation
The VIA P4PA mainboard provide 3 sockets for 184-pin, 2.5V DDR DIMM
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
slots (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. 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). 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
DDR DIMM Slots
(DDR 1~3)
2-5
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