This has started today, and before today, has never happened. PSU was purchased 6/15. Three years without issue. 6600k 980ti 16GB 960 EVO Asus Maximus Hero mobo Win 10, fully updated Temps are fine, CPU never hits 50c, GPU doesn't even have time to get hot enough before it's crashing now. Temps are usually fine in the 70s but it's powering off in the 50s now. This has happened in two different games now. So before I run out and buy a PSU when it's probably not the PSU, what other logical guesses are there? Upon Googling most results show it's someone running some offbrand PSU, so I feel like my situation is different. I unhooked everything and made sure everything was plugged in properly. Dust in the case is basically non-existent. My gut wants to say thermal paste, but temps are fine..? I'm in a 100 year old building, and they've started hooking our sprinkler system up to city water yesterday. Could that be related? It's the only variable I can think of. I'm not on a battery backup, would getting one solve that, if it were the problem? I know troubleshooting sucks, so thanks in advance for all the help.