@peterpiper :
in my case it is the memory - i spent a long time with the guys from OCZ-support... and I tried varios settings... no chance - as soon as I set the mem to 1600MHz - bsod ...
Now I am waiting to change my RAMs - gonna get those cellshocks 1800 - but unfortunatly they are out of stock at the moment... so I´ll gonna wait till they are back ( those cellshocks ) and keep my OCZs @ ~1300MHz