GPU drivers have been clean installed not even two weeks ago.
I could try doing that, the main problem is that I have no reliable way of replicating the crash, even when closely recreating the scenario of the previous crash. Even crashed under different loads, I think it might’ve even crashed without a heavy load, just using a browser, in the past, but I’m not exactly sure about that. There’s also some differences between that thread and my issue, like mine persisting even with a different GPU. Also neither the CPU or GPU were under a particularly heavy load (70% or so?) nor showing high temps. So even if the fix would work, I really have no way of knowing, could just happen again next week or in two months.
I have to admit, I’ve never updated my BIOS, and with the fear that it might be the PSU, it sounds kinda risky, but I’m not really qualified to assess that.
If it is the PSU, my guess would be that there’s some very random power spikes it can’t handle and that causes the shutdown. Otherwise it would be weird, yes, since the new GPU has a lower power draw. I’ve had a failing PSU before and that just shut the PC down completely when it couldn’t handle the draw.
It might seem a bit silly, but I am going to try a new PSU first before I stress test it again. If it is a power issue and my PSU is on the way out, I’d rather not mess with it. I’m in a financial situation now where I can stomach potentially wasting 150€ for a new PSU I may or may not need, but not a thousand to replace my PC, you know?
Anyway, thank you, still. If it happens again with the new PSU, I’ll go through these steps. And if it still happens after that… I don’t know, I’ll probably have a little cry.