So does that mean that they're now using twelve chips per board in the Rig and ten boards in the big rig.  So a total of 120 chips?  Meaning you'd need to be able to get 23.3GH/s per chip to get the quoted maximum of 2.8TH/s.  What kind of power would be needed to get 120 chips up to 23.3GH/s each?