Question PC Crashes During Gaming, No BSOD

[xe8905]

Simiar issue as user Daezu, playing games will usually cause a crash after a while. Different games have different durations before crash, but all crash without an error screen. Unlike Daezu, the PC immediately restarts, without fully powering down, so I'm now unsure if it's a PSU issue. It's by no means a gaming PC but it can (could) run resource-unintensive games. No issues in non-gaming use. Think my processor may be dying.
System was aquired mid-late 2019 with minimal use since its manufacture in 11/17

SYS: Lenovo Ideacentre 510A-15ABR
PSU: Stock proprietary
MB: Stock LENOVO 3100
CPU: Stock AMD A12-9800
RAM: Stock Samsung DDR4 8GB+4GB @ 1200MHz
SSD: Samsung EVO 870 1TB, installed last November
No dedicated graphics card

It wasn't doing this before, I'm not sure what to do without wiping the drive, and even then I don't know if that would fix it.

Issues may be:
PSU, has upward of 6,000 on-hours, as well as every other component save for the SSD
CPU, on-hours and runs without a GPU on stock cooler, idles at 30-40°C
Fans, on-hours

I don't usually mess with the BIOS but there isn't much to change on stock anyway. System is updated (save for 1/24 Cumulative but this appears to be an issue for everyone)

 

[Lutfij]

You might want to use DDU, remove all GPU drivers(Intel, Nvidia and AMD), then manually reinstall with the latest driver sourced from AMD's support site, in an elevated command, i.e, Right click installer>Run as Administrator.

playing games will usually cause a crash after a while.
What games would they happen to be?

RAM: Stock Samsung DDR4 8GB+4GB @ 1200MHz
If I were you, I'd get a dual channel ram kit with tight latencies since the BIOS on your Lenovo would likely be locked. What sort of resolution and graphical detail are you taxing the system?

System was aquired mid-late 2019 with minimal use since its manufacture in 11/17
The system is 7 years old and very likely the PSU might be unable to deliver power to the system when taxed...since you're not suffering from a thermal shutdown or so that's what I'm lead to believe.

System's rebooting wehn taxed happen for two reaosns;
overheating CPU/GPU
or
PSU unable to power the system when taxed.

 

[xe8905]

RAM upgrade is out until I have the funds to spare for it, but I'm definitely looking into it.
The system runs at 1080x1920 but I usually set games to 1280x720 for better FPS. Usually low-medium graphics settings. Wreckfest was working without issue but it's been crashing in days past as well.
I've found that open-world games tend to crash sooner than say, a closed-track racer, but it seems no game is unaffected now.
I feel it is the PSU at fault but being a unit proprietary to the system, I was hoping this wasn't the issue. It just seems that it isn't as bad as what Daezu had going on. RAM and graphics were never the issue; that was simply the lack of GPU (and 4-pin connector).
Daezu's thread had a Furmark to bench the GPU, I'll check that out. It's definitely not a processor overheat event since 1) I never get an overheat event notice, 2) even on stock cooler, loads never seem to push the processor beyond 90°C.
Thanks Lutfij, I'll look into it