To change CPU fan speed you have to first determine the fan speed. A person might want to know how to change CPU fan speed due to various reasons. He may face problems with most of the computer operations; even the starting and shut down may become very slow. There is also a specific way of determining the fan speed. The CPU fan being one of the most important elements of the computer, it needs to be in perfect speed. Usually, the CPU heatsink has the CPU fan attached to it and acts to take away the heat from the CPU. The CPU fan actually determines the CPU temperature. However, the aspect of your computer making a strange noise can be closely related to CPU fan speed. You can make adjustments to the CPU fan speed; either reduce or increase the noise and thus adjust the temperature of the CPU. There two different ways to determine the current CPU fan speed, one using the system BIOS and the other using free software. Once you determine the speed, it will be much easier to understand how to change CPU fan speed.

You will need to control the CPU fan speed for a couple of reasons. Firstly, you can lower CPU fan speeds for bringing in a quieter computing solution, which is truly needed while watching a movie or listening to music. Moreover, when video encoding or playing video games strains a computing system, CPU of the computer produces noticeably higher level of heat that has to be dissipated with higher fans speeds in order to avoid hardware damage. It is very easy to learn how to change CPU fan speed through a software.

Firstly, you have to download and install SpeedFan, and then launch SpeedFan from the desktop icon while installation. You can then wait for SpeedFan to load. Next, review and analyze the information seen on the middle left area of the program window in the left side of the temperature readings. This listing is of all the temperature sensors on your system. Again review the listing of all installed fans and their speeds respectively. Try and locate the particular fan speed controls that are listed below the fan speed and temperature readings. Then you can use the "Up" and "Down" buttons to control the speed of the individual fans. Your processor will show listings like "CPU1" or "CPU0". The changes will show instant action and you need not restart your machine.