Based on Asrock FM2A88X-ITX+ motherboard and A10-7870K APU.

Despite adaptable BIOS settings, fans make to much noise when not needed.

This is based on steps written here: https://wiki.archlinux.org/index.php/fan_speed_control

 * # apt-get install fancontrol lm-sensors
 * # sensors-detect, accept all default, at the end your asked you are asked to write to /etc/modules.
 * /etc/modules contains a line nct6775X.
 * # pwmconfig