Question Why does my computer keep shutting off?

[xaviergilmer4359]

Specs:
Ryzen 5 2600
MSI B450 Mortar titanium (latest bios)
EVGA GTX 1070 ti FTW (latest drivers)
2x 8GB sticks g.skill Trident Z RGB
Cooler Master MWE Gold 650w PSU

Recently I have been having the problem of my PC shutting off whenever it is put under graphical load. Games, benchmarks, or stress tests, anything that isn't just browsing the internet causes my PC to hard shutdown without any warning or BSOD. I have cleaned the entire PC of dust, ensured all fans (including gpu fans) were running, re-seated my GPU and RAM, set all fans to run at max speed, updated to the latest version of windows, rolled back to an earlier version of windows, run Malwarebytes several times, and still this problem keeps happening. I have had this system for over a year and this problem started only a week ago. Any help is appreciated.

EDIT: Temps just before shutdown were GPU 68c and CPU 48c

 

[Mooons]

Sounds like you are having thermal shutdowns.

What are your temps at idle and under load? I'm guessing pretty high since it shuts down just browsing the internet.

Reapply thermal paste and see if that helps.

 

[xaviergilmer4359]

Sounds like you are having thermal shutdowns.

What are your temps at idle and under load? I'm guessing pretty high since it shuts down just browsing the internet.

Reapply thermal paste and see if that helps.

Edited to add temps. They were well within normal values