SpeedFan : Monitor voltage, fan speeds & temperatures

I work on a laptop, and I think that it needs some serious tuning up with the fan. It spins very fast after every few minutes, and also is very loud. While looking for some options to control the temperature of my computer system, I decided to check out SpeedFan. It is a powerful software that can read voltages, temperatures and fan speed of your computer.

SpeedFan Review

SpeedFan changes the fan speed of the computer system according to the temperature of various components. The program checks the temperature of the system components through the digital temperature sensors and changes the fan speed accordingly. The program works with hardware monitor chips and also show the hard disk temperatures via S.M.A.R.T info. Besides its feature to show the temperatures inside my Motherboard, CPU, and HDDs this program also automates the cooling cycles of my machine.


SpeedFan has lots of functions and after using, it for my system I decided to summarize some of its important points here in my post.

  • When you start the SpeedFan, you notice a checkbox for “Automatic Fan Speed” in the program window. I first thought that just checking this would be enough to manage the fan speed of my system but I was wrong, things were not that easy with SpeedFan. Well, I check it, but I didn’t notice any change in the fan speed of my machine.
  • One very important thing to consider before you start with the SpeedFan is that this program is not guaranteed to work well with all motherboards, thus check your motherboard compatibility before you start with it. You can check your motherboard compatibility HERE.


  • To start the program working your system, you first need to configure it. Click on the tab “Configure” on the main window of SpeedFan. Here, you would see a few labels and chip. The main job of SpeedFan is to check the temperature via the temperature sensors inside your machine, and these labels show that the fan speed should vary according to the chip and sensor they are associated with.
  • In the configuration window, you might notice the blocks asking for “Desired” and “Warning”, here you need to configure the threshold temperatures for your machine. Set the desired temperature to the value SpeedFan should aim for. When your machine attains the desired temperature, SpeedFan program will start dropping the fan speeds and if the temperature of your machine is more than the desired temperature, the program will automatically increase the fan speed. When your system temperature reaches the maximum value, the software sets the fan speed to maximum. Don’t forget to check the box for “Automatically Variated.”


  • Next, navigate to the “Options” tab and click on the checkbox saying “Set fans to 100% on program exit” and set “Delta value for fan speeds” to 99. If you want to rename any label, press F2 key.
  • Now click on the tab “Advanced” and select your motherboard from the dropdown menu of SuperIO Chip. From the list of items in the dropdown menu, select the PWM control. Make sure that you select the right motherboard as by setting the wrong motherboard or the wrong clock, you might hurt your system.

When done with configuring all the settings of SpeedFan, make a shortcut of the program to the desktop and make it run whenever you start your machine.

SpeedFan download

I used it on my Windows 8 system, but it works fine with Windows 7, Windows 9x, 2000, ME, NT, XP, Windows Server 2012, Windows 64 bit and Windows Vista too. You can download it from its home page.

SpeedFan is a power tool for advanced users. The hardware and software settings of your Windows computer are best left at its defaults, but should you feel the need to monitor voltage, fan speeds and temperatures you may use SpeedFan – but remember, you should know what you are doing, because if you make wrong changes, it could have an adverse effect on your system.

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Shiwangi is a qualified writer and a blogger, who loves to dabble with and write about computers. While focusing on and writing on technology topics, her varied skills and experience enables her to write on any topics which may interest her. Creating a System Restore Point first before installing a new software, and being careful about any third-party offers while installing freeware is recommended.