Quote Originally Posted by nullface View Post
The problem is that the divider 1:1 is the lowest, so if i want 4GHz RAM has to run 450MHz, and i have tryed down to 1.9V 5-5-5-15 with loose sub's It realy sucks!

Did i mention that my Ballistix do 600MHz 5-5-5-15 2.1V on my Commando, so it has to be mobo related.
No, it could be the variation of the memory chips on the sticks. Just like CPUs, they have different voltage/speed envelopes. In DDR3, with Intel current Core i7 voltage requirements they are binned for speed AND voltage. Some that do well at 2.1v, may draw more current than others, TTBOMYU.