I've tried three different video cards in the past month. They're all X600. The first one I ordered was an MSI X600XT. It didn't work so I got a refund. After the refund, I got a refurb Sapphire X600Pro and it didn't work either. So I sent that one back for a repair. I just got my another refurb Sapphire X600Pro today. And guess what. It doesn't work. I know for a fact that video cards will work in my PC. I've tested it with an X300 and it worked. So what should I do now? Send the card back for yet another refurb one, or just give up on the video card all together?
