So 2600mhz multi works on P67??? If so the only thing z77 really offers performance wise over P67/Z68 M4E is Virtu MVP? I mean from what Ive seen you can push mem a little further on the M5G and M5F, and 4 sticks will no doubt clock higher. 2600mhz 1T though is really making me reconsider moving to the M5F though...