Memory CL ratings!

[RobUK]

I was woundering why DDR crucial ram is CL 2.5 and PC133 and PC100 is CL 2 or 3. No i thought CL 2 was faster than CL 3, so if DDR is faster than SDRAM why is the CL level slightly higher than the fastest PC100/133 stuff? Is it due to the clock pulse being counted on the up and down sides on ddr ram and only on the up side on PC133/100?

Thanx RobUK

[Fingers]

DDR sends info on both the rising and falling edge of the cycle. But the CAS rating doesn't affect the overall speed of the memory, only the initial burst.

What is the performance difference between CL2 and CL2.5 DDR modules? (http://support.crucial.com/scripts/crucial.exe/solution?11=010409-0005&130=000986849882&14=&2715=&15=&2716=&57=search&58=&2900=&25=6&3=cas)

[This message has been edited by Fingers (edited 08-18-2001).]