Assuming it's on the SIL card, sounds like the card BIOS is wrong. What, exactly, is being displayed by the card BIOS after POST? Some folks do have problems with the SIL 3512 cards, but the 3114 cards are known to work all the time as long as they have a memory chip that can be flashed with the correct BIOS. I'd just get one of the
SYBA cards that most everyone here is using.