rangerbob21, have you measured power consumption at 580 GH/s?
At the moment this miner doesn't look particularly good. You could get 4 S1s for 0.44BTC each (4*0.44*450 = $792), undervolt them to 1.2 W/GHps, and get the same performance as this board (560-580 GHps), but save $50 + cost of cooling system (~$100).
I am almost afraid to measure the draw...

I will do so tonight and report back.
I actually hope my hx750m can't provide enough power to get the card to ~700-750Gh/s. If this is not the issue and the draw is in a "good" range then I have a separate issue. Possibly not good contact from the H110i to the chips for proper cooling?
EDIT: I just set up the kill-a-watt and @775MHz, ~86C I am getting ~550-600Gh/s and pulling 675 Watts / 5.7 Amps. FYI...