Author: Matt Taylor
Date: 14:44:50 12/04/02
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On December 04, 2002 at 12:03:02, Dan Andersson wrote: >It is almost certain that SDRAM will have lower latency than DDRAM. > >MvH Dan Andersson How can SDRAM have a lower latency than DDR SDRAM? DDR SDRAM -is- SDRAM that can transmit on both the rising and falling edges of a clock cycle rather than a single edge. In actuality, they have approximately the same latency. SDRAM parts are CL=2 or CL=3. DDR parts are CL=2 or CL=2.5. The CAS latency is measured in bus clocks. A bus clock on pc100 SDRAM is the same length of time as a bus clock on pc1600 DDR SDRAM. Likewise pc133 SDRAM and pc2100 DDR SDRAM are equivalent (both run 133 MHz frequencies). -Matt
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