BSOD when running any game "irql_not_less_or_equal"

So I heard back from where I brought the parts and was told I can remove the OC but updating the bios isn't possible unless I discuss it further with them as I need a "valid reason". Either way, since I removed the OC I went ahead and ran prime95 as well as aida64.

Prime I left running overnight for 8 hours and it was all fine, aida I left running for about 6 hours which was also fine. Temperatures on both never went above 60c so that also rules out overheating.

I'm seriously thinking since you mentioned PSU that it could be the issue here. I haven't managed to test it but just thinking out loud here, if the PSU is going bad, surely it's possible that it's able to run my PC fine a lot of the time, but when gaming which is going to draw more power, it struggles and ends up not delivering enough power? It's also worth noting my PSU is a Corsair HX850 so it should be giving me enough power easily unless it's going bad.

I may be just barking up the wrong tree here but since I had random BSODs with my old build and replacing the PSU fixed it, maybe that's the cause now? That requires me to buy a new PSU just as guesswork though but I assume all other bases have been covered and it can't be anything software related or any of the hardware I've tested so that just leaves the PSU?

I'm going to stick at stock clock speeds and see what happens tonight, if there's no BSOD then either it was the OC, power draw issue with the PSU or it's just pure luck and will BSOD again in the coming days.

This really has me scratching my head now.

So I'm not sure what the issue was but it seems fixed now. I've been running with a spare PSU and lowering my ram frequency and one or both of these things seems to have fixed it. Thanks for all the help!