What does Ryzen Master say the temperatures are? Thermal max for Ryzen is 91*C, and if you shouldn't be able to exceed that without, at the least, throttling.
Temperatures are fluctuating, I re-ran stress test with CPU, and it was mostly jumping between 86 and 96. Basically it was XFR trying to push more voltage past 1.35v to get above 3,9Ghz. And then it would throttle below 91C, by dropping bit below 3,9Ghz and dropping voltage to something like 1.325V. So it is bit spiky graph in Aida64. Also Ryzen Master was giving me same temperatures +/-2C, which was more likely due to different update interval, max spike in Ryzen Master was 99C, only happened once. Also apparently my board also has node on VRM MOSS, which was at about 70C. I checked temperatures with Ryzen Master, HWMonitor, Gigabyte SIV and Aida64. And they mostly agree on them, but temperatures written are all from Ryzen Master. And BIOS settings are all optimized defaults, I didn't change anything or turn of any failsafes stuff.
I tried adding GPU to the mix, just to see if it would throttle harder, because why not try stupid ideas and that brought temperatures above 90C pretty much in less than a minute, CPU kind of didn't want to throttle below 3,8Ghz, so I shut stress test down pretty much straight after, without waiting for it to go north of 100C.
For my next step, I guess I will try adding more case fans. And replace rear fan, because I don't think it is moving enough air out. And I will see where this takes me. If you have any recommendations, for 120mm fan, which can push a lot of air, is preferably not louder than Wriath cooler I have and won't cost a fortune, I am all ears. Other than that, I guess I could manually try to set clock to up to 3,9Mhz and around 1.325V, but since I am not really into overclocking and don't know much about it, I am trying to avoid that. I feel like XFR could be bit less aggressive thought... does it even have setting for that? Or at least to be bit more on lower temperature side.