I am having an issue with my new motherboard. I just bought a Sapphire Radeon R390 card and it works well and I can get into Windows. When I get into BIOS, specifically the GPU Post section, I don't see the card listed. I tested the card in the secondary port and I could see it there. I have the latest Bios, 1504. I checked the seating and it seems fine. I would hate having to send it in and be without a computer for a week or so. Any suggestions?