My Sapphire rx 480 isn't working. I bought the rx 480 because I heard it was the best graphics card for its price range. However, when I try to play games like GTA V or Black ops it would always lag. I checked the website Can You Run It and it said I had a video graphics card of AMD ATOMBIOS and I couldn't play games like mine craft. Sure enough I checked and I really can't play mine craft and my PC settings tell me I do have AMD ATOMBIOS and not the Radeon rx480. Please help. This is my first gaming pc i built and I don't know what went wrong.