My PC keeps turning off...please help

[KisaiTenshi]

I am running all the current driver and have had no problems with game, until last night. During a CM run, my PC just shut off, i thought maybe it was a power surge, booted back up and played until maintenance (4.5 more hours). Today after maintenance, I've tried about 10 times to play, everytime, my PC runs the game fine for about 5-12 minutes and then shuts off. No overheating.

yeah its definitely the cpu over heating. its at 28-30. after less than 3 min in game it goes to 68 and keeps climbing unless i alt tab

I could have told you right away it was overheating. What you experienced is a thermal shutdown which is invoked by the CPU's thermal diode, not the operating system. This doesn't leave event log traces other than "failed to shutdown properly". This is normally something experienced by people gaming on laptops.

What you need to do is check that the CPU cooling is functioning properly. If it's it's using stock TIM (Thermal Interface Material) you'll want to replace it with something higher quality. Most third-party cooling systems look like a large radiator with a large fan or two on them, versus the stock heatsink and fan which is usually "just sufficient" to operate in an average computer case.

Even then, you may have damaged the CPU already if this has been done repeatedly.

The reason why other posters mention the PSU is that this also happens when the PSU malfunctions and drops a voltage rail. (I've seen this happen at least twice.) You also mentioned you have a UPS. Some UPS's can not be used with PSU's that have Active PFC circuits (your PC will just "turn off" should the UPS switch to battery, exactly like you experienced here.)

I suggest that you keep the UPS for it's safety mechanisms, as that will save you from having to replace an entire computer, accessories, monitors, networking gear, etc should your electricity utility send a voltage spike down the line... or lightning.