Now that I have already had two flops with fans from other manufacturers, this now seems to be working really well. The first rattled like crazy and the second I had not thought to check before buying, at which / n point (s) the bottom the notebook gets hot. That's when my rear left and the previous fan cooled only in the middle. At full load, thus it came despite full fan speed to overheat.
That is, this machine is now no longer the case. It runs, in my opinion, very quiet and cool properly. The workmanship is good and the design is right. I'm really pleased.