So, I was going to sell an older graphics card that I had and I wanted to test it(radeon hd 5670). I put it in my pc and everything was fine until I put back my original graphics card(gt 730). All fans are spinning but no display. I've tried uninstalling the display drivers since I downloaded the Radeon drivers but with no success. The card is seated properly beacouse I tried it numerous times and the dvi cable is good since it works with the Radeon card