I have a C7Z87-OCE. I understand that the RX 580 requires UEFI. My board claims to be a UEFI board but cannot figure out how to boot in UEFI mode. Link to the manual https://www.supermicro.com/support/resources/results.cfm. The 580 fans spin but no display output. I have read this behavior is constant with the card not booting in UEFI mode. Motherboard works fine with a older card.