Overclocking: minimal (in bisou Z370P mode is selected "fast")
Cooler: deepcool gammaxx 200t
In idle everything is perfect, 28-30 degrees. All the fans at the minimum.
As soon as the load (render/stress test) the temperature for 2-3 seconds rises to 90 degrees and holds. The CPU begins to noticeably raise the rpm after 1-2 minutes.
As the load disappears, the temperature again for 2-3 seconds drops to 30 degrees.
Why so quickly heats up? Not enough cooler(and why did so quickly fade?) A bad installation of cooling?. The first time I see this.