I was having major stuttering issues on my PC, I tried 1000's of hours to try and get it right, but it wouldn't work. I chalked it up to being that my at has power issues and had a few mini brownouts (although I have been told that my PSU Evga Gold G2 defends against short voltage drops).
I purchased an entire new system mobo ram and cpu skylake, and it was fine for two days.
Last night I had some of those power issues in my flat, lights flickering. I went to play and lo and behold the stuttering is back again.
UPS are simply too expensive where I live.