Ok I got my card back and it matches my serial number- card doesn't smell burnt (bonus 😉 ) I put it in my sons computer because he runs AMD and it runs fine. Plays BF4 at 200fps and I ran it under Mark 3D 11 and it came up perfectly fine. I can only think thats its his computer - 6 cards would be a huge stress on the PSU or it could even be his MB. I took video and pictures of the results. What do I do from here?