My two xtremes really overclock well. I don't think I got lucky with them either, because most of what I've heard from other owners goes along the same lines. I get 330mh/s from each regularly and recently maxed out one of them @ 1055mhz doing 345mh/s rock steady at full voltage (1.195v). While I won't be keeping it there, I continue to be impressed with the potential these cards hold. You should run them wide open and see what they give you. I find 1.180v to be the highest I'm comfortable leaving my cards 24/7, and this gets me well above 330mh/s with each, but ymmv.