Hello, I have a Sapphire Radeon hd 7970 3gb Ghz edition that has been crashing and giving me a screen with striped vertical lines and an a color that matches with the color on the screen at the point in game. I am sure it is the card because I have tested it on another rig and it did the same thing. This Christmas I am going to buy another card for crossfire and I was wondering if it would do the same thing or if it would be fine. Also if anyone knows a fix that would be great. Any help is appreciated thanks.