As the title says im having a difficult time deciding on the CPU for my new build. I have about 740$ left over after buying the rest of my parts and its going to be spent on a cpu/gpu combo. So I can either buy a i7-4770k+gtx770 or a i5-4670k+gtx780. Im not a heavy gamer, I do photo editing sometimes. I will be programming on it (engineering student) and I stream movies via hdmi (getting a 4k tv in a couple of weeks). Would the gtx 770 be sufficient enough for 4k video playback or would I need a gtx 780?