passable in most games, particularly FPS and 3rd person action/adventure. though in more CPU intensive games where single core performance matters more, like Starcraft II, that's where you're likely to see a major drop in performance compared to, say, an i3. that's in terms of frame rate.
in terms of frame time, it does tend to be placed at the bottom, though in most cases, it doesn't stray all that far from the rest of the higher tier CPUs.
http://www.hardwarepal.com/best-cpu-gaming-9-processors-8-games-tested/
that's with a 770. with a 7850 at 1080p, you're gonna need to make some compromises in graphics settings if you much prefer to hit 60fps.
take your pick on the motherboard. i recommend either Asus or Gigabyte, or Asrock...