i am having trouble with graphic card drivers.error says driver stopped working.tried two different cards but get similar results.the radeon 6950 just goes to black screen at various times and i have to cold boot system to restart.the gtx 460 se automatically recovers and just shows that it occured but keeps working.system is a new build.sabertooth x58 mobo,6 gigs dominator ram ,i7 proccessor/650wt psu,win 7 home ed.64bit on a new raptur 10,000 rpm hd.i used detective driver to install all current drivers but it still happens.any suggestions would be helpfull thanx