Memory confusion!

[spireite]

I've browsed around and finding memory timings confusing.

Assuming that I'm considering overclocking, whats the benefit of one of the other? Assume E2180 and Asus P5K or Abit IP35 based boards).

Looking at these examples which are different timings.. and the CAS4 is more expensive of course. Does the CAS4 give any advantage or not in OC'ing?

Corsair 2GB DDR2 XMS2-6400C5 TwinX (2x1GB)
800MHz RAM Speed, CAS 5-5-5-12 Timings, 1.8-2.2v VDIMM, Lifetime Warranty

Corsair 2GB DDR2 XMS2-6400C4 TwinX (2x1GB) Corsair 2GB DDR2 XMS2-6400C4 TwinX (2x1GB)
800MHz RAM Speed, CAS 4-4-4-12 Timings, 1.8-2.2v VDIMM, Lifetime Warranty with Corsair.

Thanks for your help!

 

[spireite]

So, in practice purchasing CAS4 is advised. What confused me further was the fact a lot of specs in the Gen Hardware forum that are advised generally seem to be CAS5 based. Presumably, the extra tenner or so for CAS4 is worth it then.

 

[spireite]

Cheers chaps!