Video Card Issue

I just bought the BFG Nvidia Geforce 8400 Gs video card and I’m not quite sure how to fix my problem. When I’m in edit mode the 3d view sometimes flashes black and red. My laptop did this too, until I tried it with Linux, but I don’t want to do that with my desktop. Not sure if this is the right place for this thread, but I haven’t found a solution anywhere else.