connect display to port on MB!
The motherboard I'm using (http://www.gigabyte.us/products/product-page.aspx?pid=4658#ov) doesn't have an onboard graphics card.
shit, miss that part.
plug one card without riser and try again.
did you try to disconnect the CMOS battery from the board.
had some troubles before and that helped me.
in rare cases BIOS appears to have gotten corrupted during BIOS updating.
hope is not that problem on your MB.
I just tried all of that. I plugged the card directly into every port on the motherboard without a riser. I remove the cmos battery and tried that. Neither worked.
If it helps any I get error codes A6 or 0d each time.