With DRAM it's sort of a common denominator that lower is better, the CAS Latency is the biggest factor, above you mention the the 'last' timing, where in the basic timings is the tRAS (with the above examples would be 24 or 27) so again the CAS 8 set (GSkills) would offer better performance at the same freq/speed than the CAS or CL 9 set.......the CR (Command Rate) is the 1T 2T set ( a fairly good description can be found at TomsHardware:
http://www.tomshardware.com/forum/17...rate-explained
http://www.tomshardware.com/forum/17...rate-explained
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