hello writhziden,
I did the furmark test, 25 min, temperature was not higher than 71 °. Memtest was run by me already 3-4 times for 4h-6h. No errors were found.
It is important that I have two Ram 8gb each. With 16gb the error openers. The slots can not be broken, because I have exchanged motherboard.
RAM: Crucial CT8G4DFD8213.C16FAD11