There were no controller or ring fans included. This is the one I got, Thermaltake Core V71 TG: https://www.amazon.de/gp/product/B074B5M45H/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Whenever I boot the computer or take it out of rest mode, it sets itself on high fan. Then I need to switch on the case to "low fan". I would like to change it so that it always boots on low fan. I checked the BIOS and there were options about Smart Fan, but that did not change anything.
Thanks for your help!