A couple of years ago Intel was the one with the hot power-hungry chips but these days it looks like AMD's K10 architecture is suffering the same issue. FUD Zilla claims the upcoming AMD Phenom 9950, which will is said to be clocked at 2.6GHz, will have a thermal design power of 140W.
We’ve learned that soon-to-launch Phenom 9950 will dissipate 140W. The motherboard manufacturers are currently testing their boards to see if they can take it, but most of the boards that can cope with 125W will be able to take care of 140W.
Once you overclock your 125W TDB Phenom 9850 your TDP jumps up anyway, and the board that will let Phenom 9850 overclock will also take good care of Phenom 9950.
Phenom 9950 will be the last quad-core consumer CPU with the highest clock manufactured in 65nm and the next step will come as soon as AMD gets the 45nm parts ready.