Well my pc is freezing compleatly randomly after few seconds the screen goes black and the PC makes sound like it restarts nothing is responding so I have no choise so I need to turn him off or restart him so when I do so the screen dosent responding to the PC starting so after allot of Restarts it randomly dose detect the video card so after it happend again i tried to connect the mother board and it did detect it right away and all started normaly but when i switched back to the video card nothing the screen turn it self off like nothing is working So I think its the video card making the problems shuld I buy a new one? (AMD RADEON HD 6800 series) (my english sucks I know)