![]() The third wire provides feedback on the actual RPM of the fan. First of all check the BIOS, some laptops have settings that allow you to control the fan there. Fans with 4 wires are controlled through pulse width modulation (PWM), in theory a more efficient way of controlling the fan speed. See Lm_sensors for generic details.įans with 2 or 3 wires may have voltage regulation: higher voltage (typically up to 12 Volt) results in higher rotation per minute (RPM). Specific hardware may have specific needs with respect to kernel configuration. Fans that allow their speed to be controlled.A motherboard capable of regulating fan speeds.A BIOS that allows users to control the fan speed.The role of cpu-fan script is to configure chip on motherboard, via nct6775 kernel module. ![]() Higher temperatures cause more wear on the electronics, resulting in a shorter lifespan.Ĭontrolling fan speed is not supported on all computers. The fan itself is controlled by motherboard. Depending on Kernel release you use, there is a kernel module called asus-nb-wmi in linux that allows to control fan speed.What if the program controlling the fans fails? The computer could overheat and parts could be destroyed.There are two risks when manually controlling fan speeds: It is generally considered more safe to have the BIOS or dedicated hardware control the fans. ![]()
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