MSI Pro266TD User Manual - Page 21

Memory

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Hardware Setup Memory The mainboard provides 4 sockets for 184-pin DDR DIMM (Double InLine Memory Module) modules and supports a maximum memory size of 4GB. DDR DIMM Slots (DIMM 1~4) Introduction to DDR SDRAM You can install PC1600/PC2100 DDR SDRAM modules on the DDR DIMM slots (DIMM 1~4). DDR (Double Data Rate) SDRAM is similar to conventional SDRAM, but doubles the rate by transfering data twice per cycle. It transfers 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 at the time of writing: 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. 2-5

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Hardware Setup
2-5
The mainboard provides 4 sockets for 184-pin DDR DIMM (Double In-
Line Memory Module) modules and supports a maximum memory size of
4GB.
Memory
DDR DIMM Slots
(DIMM 1~4)
Introduction to DDR SDRAM
You can install PC1600/PC2100 DDR SDRAM modules on the DDR
DIMM slots (DIMM 1~4).
DDR (Double Data Rate) SDRAM is similar to conventional SDRAM,
but doubles the rate by transfering data twice per cycle.
It transfers 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 at the time of writing: 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.