So, I've had this problem for a while now.
I play a 14 ish year old game called dawn of war, and it crashes pretty consistently about every 20 minutes.
In addition, I watched a couple episodes of a show on Netflix on my computer, and it crashed twice, once per 30-minute episode.
There's no warning, there's no noise, and the computer restarts and acts like everything's normal.
The computer I built in 2016, and hasn't had these issues until the last year or so.
The drivers are all up-to-date, and it's plenty powerful enough to run these simple programs.
I cracked open the case and it's not very dirty.
Beyond keeping drivers up to date, I'm not sure where to begin fixing this. it's a bit frustrating, but my computer restarts quickly. So that's something.
The only error report I get upon restarting is: "Default Radeon WattMan settings have been restored due to an unexpected system failure."
Is there a way to run a diagnostic or see an error, bug, or crash report? Because this is a frustrating problem.