The overclocked G.Skill Pi-Blacks nose near the 1,066MHz DDR2 but are only stable up to 1,015MHz on our Gigabyte P45 board. At the same memory timings of 5-5-5-15 the read and copy performance is marginally faster, but the read speed is lower. At its rated performance the Pi-Blacks at CAS-4 are only a little faster than CAS-5 memory and the read performance is largely lower compared to the 1,000+MHz DDR2, of which, the latencies are also a good 16 percent faster.
Naturally the Pi-Blacks can quite keep up with the reference DDR2 1,066MHz when overclocked, and CAS-4 only knocks a few nanoseconds of its latency and doesn't do anything for the raw performance here.
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