Hi! I'm trying to run one of my old Graphics cards. I'ts a Radeon 7970, and it worked just some months ago... The problem is when i feks. load a game, the screen blacks out, and a lot of epileptic flashes and stripes show on the screen. Then the pc crashes... When i plug in an other graphics card this does not happen. My PSU is 500w and my CPU is an i5 3rd gen. I've tried to re install all the drivers, and used the hardware recognizer. Have anyone had these problems? Or might know the causes of it?