"For gaming with decent graphics at a decent (i.e. 30+) framerate, yes, it's gonna put out a lot of heat. You're looking at a 980 ti or Fury X to handle 4k"
Nope. Currently on a GeForce GTX260 Core216. 4K works juuuust fine. All the Doom, Quake3 (with forced resolution and widescreen mod) Half-Life, Binding of Isaac, Nation Red, Terraria, etc. all that runs at 4K pretty damned well. Since AAA gaming has gotten so shit that people are just bothering with "Reaction" pics and videos instead of actually playing the game to review, I really don't need to do the latest and greatest hardware since the latest and greatest gaming is shit and does not interest me.
On an overclocked E7500 (to E7800 speeds) I'm only using a 250W PSU. *yawn*