pc not responding

My Toshiba c650-01t well the video driver quits responding while watching videos..Itll get choppy slow right down then freeze.Then I get a message that the video driver quit responding.As for the os..it does it with win 7,8, the new technical preview,ubintu..I dunno its a mystery..trying...

My 780 is faulty and the retailer that sold me my prebuilt computer are willing to replace it. I have asked if they would be able to replace it with a 970. As far as I am aware, the 970, while a superior product actually costs slightly less. I see also that they now use it as standard in...