While Intel chips might use less power they run hotter. Same for Nvidia GPU's.
The max temp tolerence for Intel chips are much higher so yes they are more efficient in that sense, but in the reality of it all, with an AMD CPU and an ATI (AMD) GPU my temps are lower on all rigs on full load. and in the summertime when I'm fullscreen gaming and my 7970 is pumping out at 80 F Nvidia cards are pumping out much more which requires more A/C
95w to 125w? Pfff
I'll buy AMD.