If you stop this software you should reboot your computer or manually reset your GPU fan control to automatic mode. This software puts your GPU into manual fan control (manual means not controlled directly by hardware).

HARDWARE DAMAGE MAY RESULT FROM HIGH TEMPERATURES AS A RESULT OF USING THIS SOFTWARE. USE OF THIS SOFTWARE IS ENTIRELY OF YOUR RESPONSABILITY. without fans, the temperature of my RX 590 rarely raises above 50☌ when doing non-GPU intensive activities, even during the hottest summer days.most of the time I use my computer in a way that requires minimal GPU usage (writing code, browsing the web, etc).after some years of continued use, even at low speeds, fans develop irritanting noises.

automatic fan control provided by the GPU hardware keeps the fans of my RX 590 running all the time (albeit at a very low speed).

It requires the amdgpu kernel module to be loaded. This software has been developed and tested on Debian 10 Buster with the 4.19.0-6-amd64 Linux kernel and a Radeon™ RX 590 GPU.

Amdgpu fan control