Pics of the Rev2 DFI NF4 SLI-DR mobo. Changes I can see are the layout (Same as the Radeon crossfire board), no 5v jumper so it seems it feeds always from the 5v line and a promise SATA2 controller instead of SI 3114.

Soure : http://www.xtremesystems.org/forums/showthread.php?t=66651&page=5
Edit: Also an EPS style connector instead of ATX12V

Soure : http://www.xtremesystems.org/forums/showthread.php?t=66651&page=5
Edit: Also an EPS style connector instead of ATX12V