This is the ONE.
Have 2 jupiters.
One used to hash at 534 with HW+R 3.2% and the other at 544 with HW+R 2.8%.
Now both of them stabled at 569 with HW+R at 1.3% and 1.5%.

Wattage is indeed higher from 472 and 482 to 537 and 539W.
I have 4 cores off on both machine.
Now I am waiting to see the 3 hours average increase on Eligius before congratulating KNC.