I don't think they are more power hungry, but this chip seems to be.
After following Hokiealumnus' guide on the front page, this chip only made it to 4.2 @ 1.25v, seems to be at the bottom end of the spectrum.
It was also 4.2 stable @ 1.2v... So I am still not ruling out user error at this point.
My last Intel chip was an e8400... still trying to figure out what the heck i'm doing