Thanks for answering.
Room temp ist about 17c air circulation is good.
I see what you mean. It's the HashBoard 0 (PVT_T0) with some <80c entries
I think this could be the board beside the psu.
Actual Temps: 32°C(T)72°C(H0)69°C(H1)70°C(H2)
I'll check if the heatsink screws are tightened and set fan speed to 90 as you said