The x16 slots are the 1st and 3rd in a dual crossfire setup. I should have mentioned this earlier. So the supposed crowding issue results from using the 3rd pci-e slot, which is the only other x16 slot when in dual gpu crossfire. The first gpu in the first slot crowds the second slot so it isnt usable.
Here's a couple pics:
Broad view: http://imgur.com/9ebIJ.jpg
Gpu/psu pci-e slot clsoeup: http://imgur.com/FIYHV.jpg
Thanks for the reply