First i7 drew quite a bit of power from what I know, add 2 more cores annnddd
We had a heated discussion about this at one point.
I finally bought a kill a watt and the highest I saw was 670 from the wall, everything OC'ed including the TI's
Still shutdown three different AX 860's, bought a 1200i no more issues
Niceguy...If your set on an 860 you should get it, be sure to apply a load and see how it handles within the time you have to return it