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Download Editors' Rating:
Editors' Rating:
Average User Rating:
out of 361 votes out of 4 votes

Quick Specs

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  • Total Downloads:
  • Date Added:
    Feb. 23, 2015
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Editors' Review


SpeedFan helps you stay on top of your system's vital statistics, including temperature, fan speed, and others, to ensure that things are running smoothly. Aside from basic monitoring, this program enables users to troubleshoot issues and make adjustments to various systems.


Clear interface: This app's interface is nicely organized into sections that you can move through using the tabs across the top of the screen. Options here include Readings, which features stats about CPU Usage, Fans, Temperatures, and more, Clocks, which lets you reset your Motherboard clocks, and SMART Data.

Charts section: There is also a section that lets you create charts to visualize data recorded about various aspects of your computer. You can choose to see readouts of Temperatures, Fan Speeds, and Voltages to get a better idea of the way these values are trending over time so you can quickly identify when something is going wrong.


Not for beginners: Most of the information this program presents will have little meaning to inexperienced users. There are good warnings about taking actions that could potentially harm your computer if you don't know what you're doing, so you're not likely to do any harm. But it won't do you much good either.

Bottom Line

SpeedFan is a nice, free utility to help you monitor various aspects of your system. It presents all data clearly, and you can find what you're looking for quickly, thanks to the conveniently tabbed interface. It's not much use if you don't have some significant knowledge about your computer's inner workings. But for power users, it's a good tool.

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Publisher's Description

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User Reviews
  • Current Version


    out of 3 votes

    • 5 star 1
    • 4 star 0
    • 3 star 0
    • 2 star 0
    • 1 star 2
  • All Versions


    out of 361 votes

    • 5 star 117
    • 4 star 114
    • 3 star 51
    • 2 star 24
    • 1 star 55
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Results 1–3 of 3

5 stars

"Appearance is very beautiful, I love it"

August 18, 2015  |  By StairsTroll

2015-08-18 01:00:08  |  By StairsTroll

 |  Version: SpeedFan 4.51


Really suitable, provided me with a lot of help, a lot of problems to solve.


Nothing is bad. I can only say so.

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1 stars

"Great for Causing Lengthy Hangs and Crashes"

June 03, 2015  |  By Fredex8

2015-06-03 23:05:30  |  By Fredex8

 |  Version: SpeedFan 4.51


An excellent bit of software for freezing your computer and causing it to hang for minutes on end for no reason.


Doesn't appear to do anything other than cause lengthy hangs.


The first time I ran this it caused the computer to hang so thoroughly that I couldn't even open task manager to kill the damn thing. I assumed this was because I was rendering at the time and the CPU was at 100% usage so it wouldn't be unfair for a program not to respond. Apparently this had nothing to do with it though. When I finally managed to close Speedfan and regain control of my computer I ran it again without my CPU being at full load. It did exactly the same thing. This time it only took a couple minutes to close it rather than five though. It seems to hang whilst scanning for something or other and the only way of making it stop is to kill the process.

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1 stars

"Try another piece of software, this is terrible."

March 31, 2015  |  By mikemc3

2015-03-31 15:06:23  |  By mikemc3

 |  Version: SpeedFan 4.51


Accurate displays the temperature sensors in your PC chassis, cpu and gpu.


Doesn't actually control the fan speed of any of the fans in said chassis. Find another program if your looking to control fan speed. Also the interface is way to convoluted.

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Results 1–3 of 3

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Full Specifications

What's new in version 4.51
  • added full support for Fintek F71811U
  • added full support for Nuvoton NCT6106D
  • added full support for Nuvoton NCT6792D
  • added full support for Fintek F71878A/F71868A
  • added full support for ITE IT8783F
  • added full support for Intel C610/X99 SMBus
  • added full support for ITE IT8620E
  • added support for Nuvoton NCT6683D
  • fixed Fintek F71808A PWM MODE setting
  • added PWM 4 ENABLE and PWM 5 ENABLE to advanced options for the ITE IT8620E to enable or disable PWM 4 and 5 writes
  • smbus access is disabled for Sapphire PC-AM2RD790
  • fixed fan speed readings on the NCT6791D
  • SCSI Scan is automatically disabled if iastorA.sys driver is installed - use /DOSCSISCAN to force enable it
  • fixed Fintek F71811U PWM TYPE advanced setting
  • greatly improved RAM SPD decoding for SDRAM, DDR, DDR2, DDR2 FB-DIMM and DDR3
  • improved identification of newer revisions of Microchip MCP9843 and MCP98243
  • fixed STTS3000 and STTS2002 temperature reporting
  • fixed old IT8705F identification
  • events can now be triggered if something happens for, at least, up to 9999 times (it was 99)
  • battery charge is now properly updated on the EXOTICS tab
  • NCT6791D IO Space accessibility is now tested upon resume from suspend and fixed, if needed
  • restored DIMM access on latest Intel chipsets
  • added manifest to improve support up to Windows 10
  • configuration dialog now always opens at the center of the main window
Publisher Almico Software
Publisher web site
Release Date February 21, 2015
Date Added February 23, 2015
Version 4.51
Category Utilities & Operating Systems
Subcategory System Utilities
Operating Systems
Operating Systems Windows 98/Me/NT/2000/XP/2003/Vista/Server 2008/7/8
Additional Requirements
Download Information
File Size 2.12MB
File Name instspeedfan451.exe
Total Downloads 3,715,758
Downloads Last Week 5,613
License Model Free
Limitations Not available
Price Free

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