Does it matter that two of the timings change but the others don't? I've seen charts that say low latency 1600 beats 1866 CAS 9 (except in bandwidth) but I don't know enough about each of the timing numbers. And how would the timings affect the bandwidth itself?
I'm mainly looking to (hopefully) get a bit better performance in a certain program that requires a lot of quick read/write to and from RAM. (I'm actually asking about this on their forum, too)