So recently I had been having power issues in my house, brownouts etc.
I did a lot of research and asked a bunch of professionals including speaking directly and the consensus was that good PSU's are very good at protecting components with bulk caps etc to protect undervolting/overvolting and that a UPS wouldn't be necessary.
Nevertheless I faced huge input latency issues after a series of power issues in my house. It felt like V-sync was enabled on my cursor in applications and did every possible fix. There was no signs of hardware failure or other issues, frame rates were fine and synthetic benchmarks were OK.
I decided to upgrade CPU, MOBO and RAM and low and behold the input latency issues went away in games and applications.
The other day I had a power issue again with light flickering. The input latency has started again, feels like there is 20+ms being added to my mouse, not in control of it and fighting it's movement.
I don't understand how it could cause this issue without obvious hardware damage.
Is there some sort of circuit that fried that is taking longer for the inputs to register?