the p5nd2-sli reads the memory speeds wrong, it reads it devided by 4 from whats set in bios, example: if bios is set to 666 cpu-z let's it see as 166. i have the same 'problem' can't oc that f00ker even 1Mhz 266x15 is max, wich is the rated max speed, when i try 267 i get lockups. Also the vdrops are insane, from 1.35 idle to 1.25 load.