The only thing that jumps out to me here is CPU cooling. However, the issue is also happening when I'm idle on my desktop, or browsing YouTube, Netflix, or anything else. It just happens a lot faster when I load up a game. Now, I tested my CPU temperature while on my desktop, and it was 59-60 degrees Celsius, which I'm assuming is normal.
Even at the time of the issue, the max temperature was 59 degrees. I checked the other stuff as well, and disabled Overclocking and even changed from the XMP to default profile in BIOS. Now, the PSU is my next target, cause I've been told by people on other forums that 450W isn't enough for my system (specs listed above). I don't necessary believe this cause it's been running abolutely fine over the last few months, which is when I got my CPU and Motherboard upgraded. Also, my new Ryzen 5 5600 has the same TDP as my old i3-8100, so I don't see a problem there.
So, my next question is can you or anyone else advise my on how to proceed? Aside from maybe getting a new PSU. Cause I can't test with a cheap/temporary PSU, if I have to I'll just buy it, but I want to know for sure that its the power supply before spending on a new one.
Again, the issue is that my PC is restarting randomly, the screen freezes and goes black for a second, and then it restarts like it would after a BSOD.