no, i think you're on the right track with software and drivers, haven seen where michal86 says he's checked the intel site for updated drivers yet either but would still like to see a prime stress test and ram check.
not that you need it but i did just run across a good guide to test things with at least 1 thing i don't think either of us has thought of. ie. step 6 disable c-state in bios. :- https://www.driverea...andomly-easily/
sorry michal86, you're going to have a lot of replies to read because of me.