Zotac actually sell a separate pcie x1 'ION' card for that mobo, which is a little curious.
I was seriously considering this board, it seemed the perfect DTX offering BUT there has been such a stink about the onboard SATA on the Zotac forms that I gave it a miss. The 4 black ports are hung off a JMicron port multiplier and it seems the first drive to be initiated is really slow compared to the others.