@Nintendo, I'm not concerned with power draw, if I were, I would have undervolted and downclocked the cpu.
@Mellis, 4K gaming is awesome, but you have to drop a lot of coin. Then once you return to do something productivity related in windows, you'd wished you had stopped at 2k. For some reason 4K and Windows doesn’t play very nice together. It can be done, but expect a lot of fiddling with windows settings. As for handbrake if you can get a higher overclock out of your cpu it would help, unfortunately handbreak saturates at 6 cores. So a i5 8600k is probably the fastest that you could get for handbreak.