Not much to add beyond what's been said above besides maybe having the system looked at from a hardware standpoint, but even that may not reveal itself until later in time. If we're focused on the power strike, then just be aware that it's normally the weakest component that likely feels the effects. I don't normally promote stuff in full, but this scenario is exactly why I have one of these in every room of the house and it's saved me tons of $$ (even though the batteries eventually need replaced). The reason I chose this one was high capacity vs price And it uses a clean power tech that allows it to be safely used on even medical equipment. They have cheaper ones, but I like to max my options out. IDK how many hurricanes this has helped with as I can use it to recharge phones or power a USB light off of.
Aside from that, I suppose you could go with the assumption that the software (OS/drivers) got borked with the solution of doing a clean reinstall, but I'd save that for last. If you don't already, then I'd use the -maxinactivefps flag and set it to like 5 (FPS) so that when the game isn't in focus (you toggle to the other screen), then it dials down the stress on the GPU for that period of time.