I'd hardly call an 8 cored, 32nm CPU "cool". I believe Intel rates them @ 120 watts, as a matter of fact. Okay,
they claim 115 watts, which I doubt very much is even one watt less than 120, which is awesome for a 2.6 Ghz, 16-threaded, 32nm CPU. BTW, how easy are Zens to cool down, compared to 16-threaded Sandy Bridges?
Oh, and no matter how easy or hard a particular CPU happens to be to keep cool, makes zero difference in how much they heat the air in the room in which they reside. See, since computers do zero actual work (they move nothing, at any rate,for any distance), 100% of the watts that they use, not including spinning fans or spinning disks, is put into the room as heat. When you don't live up near the north pole, having one room of your house 10 or 15°F warmer than the others all summer long is something that you try to avoid, even if it costs you a bit of extra money when buying components.