Caporegime
I did try the 300.83 drivers but they didn't really help tbh. I still had stuttering during games but I think they may of helped during video playback (XBMC). They also lacked SLi profiles for a couple of games (Alan Wake etc) so I was getting poor performance on some titles. My main game ATM is BF3 & they didn't make things any better there. I'm using the 301.34 now. They all gave me stutter so I thought I'd just stuck with these until a fix was available.
Fair play and sorry to hear it didn't sort it. New drivers leaked now but I will wait for the NVIDIA site before I try them.