I've talked to Bitmain about the 28nm chip since December of 2013. These new AntMiner S4 units should really kick ass. I estimate 1380-1400 watts at the wall for 2000 gh/s.
Heat should also be significantly less.
The .5watts/ghs is per chip, not at the wall.
Very Respectfully,
GreaterNinja
Didnt you idiot just post this BS yesterday?
I wish they dont refund shit, they love idiots like you. I bet you were gonna find suckers to buy these S4s off your hands right?