The third wire provides feedback on the actual RPM of the fan. 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.Options are from 20 to 100 percent in 10 percent increments. There are many things that run in the background, like Services you dont need, that can be shut down to minimize CPU usage. Fixed: Allows the fan speed to be set at a fixed speed and never change. That might give you a clue as to why the fan is running so much. A motherboard capable of regulating fan speeds If youve been Overclocking your CPU, STOP IT Go into the task manager, (CTRL + ALT + DEL) and look at the CPU usage.A BIOS that allows users to control the fan speed.Higher temperatures cause more wear on the electronics, resulting in a shorter lifespan.Ĭontrolling fan speed is not supported on all computers.What if the program controlling the fans fails? The computer could overheat and parts could be destroyed.As suggested by the name, these controllers offer. There are two risks when manually controlling fan speeds: A super-easy way to speed up your CPU fans is by using an external fan controller. It is generally considered more safe to have the BIOS or dedicated hardware control the fans. HP Desktop PC - Setting the Minimum Fan Speed in BIOS Turn on the computer, and then immediately press F10 to enter BIOS.

Adjust cpu fan speed