From what I have gathered from reading about these effing cards is this...
They are already voltage adjusted... It is speculated that the outlying transistors aren't getting the same juice as the "inner" ones. That cannot be good.
They are going to be super hot, I cannot see much headroom coming out of these unless you run it under frost.... Even then I see the pwm being a problem.
All in all I'm thinking these might be a huge headache for the price for what we do. For the average gamer they may be fine, but I have serious doubts about this nearly scrapped Fermi project. Pre underclocked and overvolted at stock is not a recipe for win in any book.
The sad thing is... I want one anyway. Go figure.