Quick warning to anyone switching out the PSUs. You must have at least 60a on a single rail for this to work. I have now blown four PSUs trying to get this thing working. It just swallowed up two 750w 53a PSUs.
I bought two Corsair AX860's after I purchased them I though it was a bit overkill and was thinking of finding cheaper ones. I wanted ax870 but amazon did not have them in stock for prime.