Curse

Brett Kuntz · Jun 22, 2009, 01:34 AM // 01:34

Quote:

Originally Posted by Rahja the Thief

Acceptable CAS Latencies are as follows:
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DDR1= 2.5ns, 2ns
DDR2= 3 to 7ns, varies on speed. (most models you want between 4-6ns)
DDR3= 6 to 9ns, again varies on speed.

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Memory timings are in Clock Cycles, not Nanoseconds. A CAS Latency of "9" on DDR3 means 9 cycles, not 9 nanoseconds.

DDR3-1600 CL9 = 1.25ns per clock = 11.25 delay

But if you can overclock that memory to 1800...

DDR3-1800 CL9 = 1.1ns per clock = 10ns delay

And lets look at performance:

DDR2-1200 CL5 = 1.66ns per clock = 8.3ns delay

DDR3-1866 CL7 = 1.07ns per clock = 7.5ns delay

Lord Sojar · Jul 21, 2009, 10:22 PM // 22:22

Quote:

Originally Posted by Kuntz

Memory timings are in Clock Cycles, not Nanoseconds. A CAS Latency of "9" on DDR3 means 9 cycles, not 9 nanoseconds.

DDR3-1600 CL9 = 1.25ns per clock = 11.25 delay

But if you can overclock that memory to 1800...

DDR3-1800 CL9 = 1.1ns per clock = 10ns delay

And lets look at performance:

DDR2-1200 CL5 = 1.66ns per clock = 8.3ns delay

DDR3-1866 CL7 = 1.07ns per clock = 7.5ns delay

As stated in the other thread, it was a notation issue, and I went ahead and removed it instead of adding Hz notations. But thanks for pointing it out.