So i started a engine tournament. After around two hours the PC reaches 35°C water temperature and could hold it for the next two days. The Noctua fans runs on ~1100-1200rpm and I was not so satisfied with that noise and heat output. After some hours I was nerved by that. On gaming they never reached this rpm. Now I deceided to improve the cooling by adding a water chiller. After some test I found a perfect working configuration.
I want to share my practical experience with you so you can see what you have to expect with that.
At first the positive side: The PC keeps absolute silence and cool, even after three days full load
At second the downside: Placeing the Chiller in the same room is a absolute no go! Much to loud and producing a lot of heat.
I placed it in the next room from my son. The room is not used anymore because my son is out of house with his owen family.
The room was heated up from 24°C to 27°C after some hours. Outside temperatur was 26°C. Best place for the chiller would be a cellar.
Hope this helps anyone wo is thinking about a chiller.
here a shematic sheet of my cooling. The water tank is needed or you would get a high switching frequency of the chiller.

