How to use SpeedFan to control PC’s fan speeds

SpeedFan is a freeware program for Microsoft Windows used for monitoring the system by reading temperatures, voltages, and fan speeds of your computer.

In this article, I will be explaining to you how to use SpeedFan to control fans without difficulties.

I guess you are here because you are already facing trouble while controlling your computer’s speed fan, then now you are in the right place and by the end of this article you can just chill out by getting rid of your trouble!

We use fans on our computer to prevent it from overheating, but sometimes the sound of the fans can be really irritating and we need to control our PC’s fans’ speed.

There are 2 types of way in which you can control your fan . they are:-

How can I control my computer fan speed?

In modern days computer, you will get built-in fan controls that you can get in the BIOS of your computer.

Most of the fan controls(depending on the motherboard)  follow a similar pattern. You can enable automatic fan control and  SYS fans from the choice given in the BIOS menu.

Controlling computer’s fan speed with SpeedFan software for more advanced control

If you don’t get built-in fan controls in your computer then you can use the Windows program called SpeedFan which will give you more control over your fan speed.

SpeedFan’s fan control feature is not compatible with all the motherboards. To check whether your motherboard supports SpeedFan or not you can check the list here

SpeedFan controls your computer fan’s speed and reduces noise based on the temperature of any of your computer’s components, which you can monitor from a window.

SpeedFan may not support your computer’s motherboard but you can still use it as a monitoring or troubleshooting program. Although the interface can be confusing to use but if it supports your motherboard then it will be very beneficial for you.

NOTE: If you already have in-built fan control settings in your computer then turn it off from your BIOS if you wish to use SpeedFan so that the two of them don’t conflict. 

How to Use SpeedFan?

You might find SpeedFan quite complicated to use, so in the following steps, I am going to discuss the step-by-step method to use the Speedfan very easily.

Step 1 - Download SpeedFan And Get Familiar

At first, you have to download SpeedFan from here and install it on your windows operating system.

Launch SpeedFan after you have installed it and wait for some time till SpeedFan scans different sensors(digital temperature sensors) and hardware monitor chips on your computer, the following window will appear:-

y CPU temperature is showing too hot

You will find a number of fans on the left column showing how fast the fans are running in rotations per minute (RPM). On the right column, a list of temperatures for your graphics card, motherboard chipset, hard drives, processor, and more will be found.

Meaning of the symbols in the right column are:-

  • Tick:-  Your hardware is running within the expected temperature.
  • Down-arrow:-  Your hardware is running at low temperature and that is good. 

Flame:- Your hardware is running at very hot temperature.[Make sure the temperature doesn’t increase above 85 degrees Celcius]

Step 2 - Configure the Options Tab

  • Click on the configure button at the top right of the window, below the minimize button.
  • When the configure window appears, then  select the Options tab.
  • Check the “ Set fans to 100% on program exit” box so that the fan doesn’t follow any previous setting when you press exit.
  • Set the “Delta value for fan speeds” for maximum fan speed.

Step 3 :- Select your chip For Testing Your Fan Controls

  • Navigate to the “Advanced” tab and select your motherboard’s chipset from the list
  • Now you have to click the “PWM Mode” options that are set to “MANUAL” ( or set it to manual using the dropdown menu at the bottom of the window)
  • Click Ok after you are done

Step 4 :-  Check Fan speed

  • Now after you are back to the SpeedFan window, use the up and down arrows to raise or lower the speed of the fan you want ( here I reduce the fan speed of my CPU fan). You can also lower or raise the speed according to your requirement.

NOTE:- Never lower the fan speed below .30%, then there is a probability that fan RPM will read it incorrectly  and the fan rotation may stop.

check fan speed
  • You can rename the fans you have, just navigate to the speed tab from the configure window, highlight the fan you want to rename, and press the F2 key .
  • Press the okay button and the changes will reflect to the main SpeedFan interface.
speedfan interface

Step 5 :- Set the automatic fan speed (Alternative way)

Tick “Automatic fan speed” so the fan speed is set automatically or you can configure it too.

automatic fan speed

Select the configure button to go back into the configuration menu and navigate to the “ Speed” tab.

configure speed tag
  • Select one fan and check the box for “Automatically variated.” You can also set minimum or maximum percentages for the fans you want.
automatically variated

Step 6:- Control fan speed based on the temperature

  • Navigate to the temperature tab
  • We can experiment with the fan speed with the help of this temperature tab(slow down the speed or increase the speed according to the temperature) by configuring the following things:-
  1. Show in tray:-  Tick this box, if you want to get the display of the components you want to monitor.
  2.  Desired and Warning:- Adjust these options accordingly so that when the CPU becomes too hot  exceeding the desired value and reaching the warning value the speed of the fan gets speed up by giving you a warning of the flame symbol.

You can click on the plus sign next to a sensor to see all the fans it can control and check the fans you want it to control.

I hope that now you can easily use Speedfan to control your computer fan.


I have clubbed some most frequently asked question-related to Speedfan here:- 

  • Can SpeedFan control 3 pin fans?

Ans:- A 3 pin of course can only control by voltage, but If you have control of the header via the bios, you should be able to do it. 

  • Why is SpeedFan not detecting fans?

Ans:-  Sometimes when the Speedfan and BIOS is not updated such issue arises so update them and check again or also it may happen SpeedFan doesn’t support your motherboard chip

  • What are the alternatives to Speedfan?

Ans:-   1.) Argus Monitor – $19.95 – $33.95

             2.). HWiNFO – Free

             3.) Real Temp – Free

  • What is a good PC fan speed?

Ans:- For a stock CPU fan, running a fan at 70% of RPM or above will be a good CPU fan speed range. 

If you are a gamer or HD video editor then when the CPU temperature reaches 70C, set the RPM at 100%.

If the temperature is between 50C to 55C the CPU fan speed should be around 50% of the total RPM. 

  • Is 100 fan speed safe?

 Ans:- Yes, they are designed in that way

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