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What is SDR SDRAM?

SDR SDRAM is Single Data Rate SDRAM.

SDR SDRAM is the original SDRAM standard, which has since been replaced by DDR SDRAM.

DDR SDRAM doubles the bandwidth of SDR DRAM by transferring data twice per cycle on both edges of the clock signal, implementing burst mode data transfer.

Standard SDR SDRAM DIMMs

SDR SDRAM is normally packaged in DIMM modules.

SDRAM DIMM modules are sold according to clock speed (MHz), bus speed (megatransfers per second), and transfer rate (megabytes per second.

DIMM ModuleChip TypeClock SpeedBus SpeedTransfer Rate
PC6610ns6666533
PC1008ns100100800
PC1337.5/7ns1331331,066




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