Since my new "Silence" Desktop was not quite so quiet because of the rapidly rotating fan but I was looking for a solution. The setting in the BIOS does not bring the desired success. Either it was the Bios, or to me ;-) Since I have a front door, the decision was made to this fan control with retractable knobs. The fan controller is attached quickly and accurately with the screws. I have my three fans connected (input fan output fan and processor fan). A fourth fan may be connected. What is very good that all required cables, with extensions and adapters to other connectors are. The cables are well labeled. The installation instructions are well illustrated. Anyone who has ever seen a PC open, should the installation have any problems. Only, the attached tape is worth nothing. For laying the cable a couple of cable ties are helpful. Since temperature sensors are supplied, I have two connected. With a bit of tact can adjust it the fan. The are usually set so only once. Speed and temperature are displayed simply in a pleasant color. Thus, the fan start sure it when you turn on Max. Speed under certain circumstances, then settle down. Now I have my "Silence" Desktop.