PC restarts randomly with no BSOD

My PC restarts randomly with no BSOD or anything. Just a black screen and straight restart. This has been happening consistently for 2 days, but has happened like 1-2 times before that as well. It's out lf control now, however. 

Today, my PC was consistently restarting around 2-3 minutes after booting up and arriving to desktop. I reinstalled windows ("dirty" install) and the frequency dropped but it's still happening randomly.

It mostly happens with games, like halfway into a MW2 Multiplayer or CSGO match or in the Starfield menu (but Starfield has been having such issues anyway). However, this is not exclusive and the PC does restart at any point when not in game, although it does take significantly longer to do so when I'm just browsing or doing anything other than playing. 

I thought reinstalling Windows 10 would fix it but well, it didn't. There are a few different errors in the event log that are causing the "kernel" event that basically means the PC was restarted but not in the proper way, but we already know that. 

Need help, people. I'll provide anything I can to help. 

MSI 6600XT

Ryzen 5 5600

Asrock B450M

Corsair Vengeance 2x8GB DDR4 3000 mhz

Corsair VS450