Now a completely different thing from me - I have lots of driver crashes: black screen for about a minute, whilst sound still running in the background, then image shows up again with driver crash info. It never happens in games, or stress tests etc. But seems to happen a lot in Windows in low power use, e.g. working in Word, Teams, Excel, browsing websites, watching videos on youtube etc. Oddly, it never just happens if I don't touch anything, it only happens when I click something like new tab in the browser, open a new video, new document, click a button on web page that would open another page etc. I sent tons of crash reports about it to AMD but frankly it's getting ridiculous now, stopping me just working during the day, but never stops me gaming...
GPU is Asus TUF 6800XT (bought in OC UK actually) - newest firmware flashed from Asus website, didn't change anything. PSU Corsair RM850 (less than 2y old). I changed CPU from Ryzen 7 5800x to 5800x3D but it still happens. I changed RAM from 4x8GB Corsair 3200 to AMD-certified Kingston 3600 (2x16GB) but that changed nothing. I've tried few versions of drivers (from the past 6 months or so), few BIOS versions for my MSI B550 Carbon motherboard (no change). Reinstalled Windows from zero - no change. I've put RTX 3080 for testing for few days in - zero issues. It has to be the driver or GPU then, for some reason. Even clean OS with just Windows Updates driver - same crashes randomly after a while. I can't catch it in any stress test, benchmark or games as mentioned - unless game is running in the background and I alt-tab to web browser, open some videos and just multi-task in general, then it can happen too. I thought it might be caused by video playing but had it happened few times with no videos opened at all, too.
The above crashes happen either once every 1-2 days or can happen few times in a row. There's no pattern to it, seemingly. Very bizzare thing. And same PC (I changed nothing) worked for almost a year with 0 issues, then this started... I've seen bunch of people writing on Reddit with similar issues, but no solutions (some even got new GPU from the vendor but that didn't fix it either) and everyone seems to be just blaming GPU drivers. No clue what to do about it, aside swapping the GPU to NVIDIA one and be done with it. That said, I had similar (just much worse as it was crashing much more often, even though I've tried 5 different brands of same GPU!) experience with RDNA 1 card, which forced me to get RTX 2070S instead (and never had such issues with that one, though it had other NVIDIA-related issues). Said NVIDIA card I swapped later to current one and here we are again, a year later.
Any ideas? I am fresh out of anything else I can try.
EDIT: What has occurred to me is that some time before it started to happen, I got Alienware OLED monitor, which has full G-Sync Ultimate module. Makes me wonder if that isn't the problem, when said module and non-G-Sync AMD card have some issues talking to each other (VRR is active) at times and it could trigger driver time out for example. And I also run HDR mode a lot in Windows, which perhaps influences it as well somehow.