Okay, that I understand

So I was just using an arbitrary $.10/kwh rate.  You are saying there may be a sweet spot where rates are high enough that it would make more sense to run underclocked rather than stock.  I'd have to see hard numbers to get it when trying to compare apples to apples.  For the additional capital outlay, I don't see the underclocking making up the difference in a reasonable time.  Since in my example I'm going to pay the same amount for electricity whether I'm using underclocked units or stock units I'm having a hard time seeing the underclock advantage for best dollars spent.