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SpeedFan 4.51 Software Review

speedfan-logo-2This little program is perfect for different users – advanced and simple. It has many features that earned it respect over time, main of which is monitoring the fan speed, temperature of the CPU, the HDD and several others. We have decided to review the latest version of the program to display to you what are the features it has and how can it be a benefit in comparison with the competition.

App Profile

Name SpeedFan 4.51
Type Temperature Monitor and Fan Control
Developer Afredo Milani Comparetti
Download Page SpeedFan
Operating System All Windows OSs
License Free with donation option
User Experience Discuss SpeedFan 4.51 In Our Forum

SpeedFan – Main Features

At first glance the program was very light, taking up just 5.0 MBs of RAM and next to none from the computer’s CPU:


When we installed the program and by the way that was lightning fast, we noticed that it detected and attached itself directly to the sensors of the laptop it was working on. Then we noticed which sensor was for which indicator:


Then we went deeper, into seeing the features for advanced users. The results were very satisfying. The program allowed several interesting overviews of the temperature of the GPU, CPU cores, HDD and Temp1 and it even had the ability to present one chart to compare whichever you would like to compare. This is perfect in case you are doing a comparison test between two devices:


In addition to that, the program favors the users interested In HDD’s as well. It allows users to perform even a so-called “S.M.A.R.T.” check of their hard drive and display hard drive errors as well as its temperature:


This program is very suitable if you want to change your fan speed in case your fan Is partially broken or noisy especially at high speed. In addition to that the program can even tamper with and work with the sensors of older devices, 64 bit and older versions of Windows:

  • 9x
  • ME
  • NT
  • 2000
  • 2003
  • XP
  • Vista

The program can cope with nearly any values of the:

  • Hardware chips.
  • Temperatures.
  • Hard drives.
  • Fan speed results.
  • PWMs.
  • South Bridges.

The simplicity and the size of the program with those features are perfect not only for tests but for active usage in case you want to watch constantly over your device’s temperature. Finally, we have to say a good word for the advanced settings which allowed us to modify and change different preferences according to our demands:


What We Like

We enjoyed several different aspects of this program:

  • Lightness.(5.77 MB in size)
  • Simple design.
  • Non-performance demanding.
  • Fan control feature.
  • Focus on the HDD speed and temperature.
  • New “Magic” features about to be added in the future version.
  • Clocking feature.
  • GPU fan speed and monitoring.

What Is Missing

It was very difficult to find something that needs improving in this software:

  • A bit more modernistic design.
  • The chart can be added to the General tab where as soon as you change the fan speed you can be able to see the difference.


As a bottom line we have to admit that this is probably one of the best software, if not the best out there for temperature measurement and fan modification. It totally blows away any competitive software with its lightness and in the same time features and advanced preferences to tamper with.

Note: This test was performed on a Lenovo B50-70 with 64-bit Windows 10


Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

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