Here’s the process to be able to use the fan at its maximum speed: That’s why you can also use a 4-pin fan into a 3-pin connector and it will run at its maximum speed, because without a signal coming from the PC to the fan, the fan will spin at the fastest speed given that the voltage is constant. This allows the fan to rotate to its maximum speed as it will not be receiving a PWM signal from the motherboard. The solution to this is to cut the PWM signal cable. Therefore, even if the CPU is hot, the fan isn’t spinning to its maximum speed. It then reduces the speed and then goes to maximum speed again and this process continues, but once the “cleaning” process finishes, the fan speed is reduced. With this function, the fan indeed runs at maximum speed, but for some seconds. The laptop does has a tool that provides a function called “Dust Removal”. The problem with the laptop is that the BIOS doesn’t allows setting up the fan speed and neither does it provide a “Turbo” mode, something that some gaming laptops have to allow the fan to spin at the maximum speed and prevent overheating. This laptop fan is a 4-pin fan but the connector is propietary, meaning that the cables aren’t in order. It is a 2013 model (and we are in 2018 now. The laptop we will be seeing today is the Lenovo Y510p. The 3rd cable again is the cable that sends rotational RPM information to the PC, while the 4th cable is the one where the PC sends the signal to the fan to change their speed.

This is very dependent on the machine.Ĥ-pin fans are PWM-controlled. The 3rd cable sends rotational speed information to the computer and depending on the heat and the BIOS, it will either increase or decrease the fan to a specified RPM. 3-pin fans are Voltage-controlled, where the variance in voltage changes the CPU fan speed.

In this post, today I’ll share you this method that will surely end with your laptop overheating issues.Īs you may know, CPU fans comes normally with 3 or 4 pins.

Laptop fan speed