That's not the issue. The problem is that your BIOS itself doesn't even recognize the NICs, which is way before any driver gets involved. Update the BIOS? Verify there's no way in the manual to disable the NICs via a jumper or something.
If the BIOS itself can't recognize the NICs, there's zero chance of any OS recognizing them (and as trurl pointed out Unraid doesn't see the card at all, because the BIOS doesn't)