The difference between cas7 and cas6 1600 is so small it is not worth adding the extra juice, infact cas8 to cas7 is so small again its just not worth it. 4GHZ CPU needs 2600NB to shine, I actually like 3800MHZ CPU and 2800NB with 1600 7-6-6-24 1T as its so easy with both the 955 I have here and a 64Bit OS....why struggle for higher when all you gain is a better everest bench and games don't see much of an increase.

lets be honest here, CPU's need to jump 400MHZ for you to notice, NB is 200MHZ and ram 400MHZ...when Phenom hits 4400MHZ or so then 2000 ram will shine BUT remember the NB will have to be at 3000+ for it to take advantage of the extra ram speed.