# SpeedFan > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/SpeedFan > Markdown URL: https://mediated.wiki/source/SpeedFan.md > Source: https://en.wikipedia.org/wiki/SpeedFan > Source revision: 1331407110 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) System monitoring tool SpeedFan SpeedFan 4.44 in Windows 7 Original author Alfredo Milani Comparetti[1] Developer Alfredo Milani Comparetti Release 27 March 2001; 25 years ago (2001-03-27)[2] Stable release 4.52 (29 June 2016; 9 years ago (2016-06-29)) [±] Preview release 4.51 beta 2 (7 August 2014; 11 years ago (2014-08-07)) [±] Written in Delphi, C++, C[citation needed] Operating system Windows 95 and later[1] Type System monitor License Freeware[1] Website www.almico.com/speedfan.php **SpeedFan** is a [system monitor](/source/System_monitor) for [Microsoft Windows](/source/Microsoft_Windows) that can read temperatures, voltages and fan speeds of computer components.[3] It can change [computer fan](/source/Computer_fan) speeds depending on the temperature of various components.[1][4] The program can display system variables as charts and as an indicator in the [system tray](/source/System_tray).[1][4][5] Fully configurable user events can be defined to execute specific actions based on system status[6] ## Hard disk support SpeedFan also monitors [S.M.A.R.T.](/source/Self-Monitoring%2C_Analysis%2C_and_Reporting_Technology) readings for EIDE, SATA and SCSI hard disks. Starting with version 4.35, SpeedFan fully supports [Areca](https://en.wikipedia.org/w/index.php?title=Areca_(company)&action=edit&redlink=1) [RAID](/source/RAID) controllers. Version 4.38 added full support for [AMCC/3ware](/source/3ware) SATA and [RAID](/source/RAID) controllers.[1] ## Hard disk in-depth online analysis SpeedFan offers a feature named "in-depth online analysis" that compares the hard disk's S.M.A.R.T. data to a database with statistical models of hard disks allowing early detection of potentially degraded hard disks.[7] Messages inform the user of specific situations and problems, which Almico says is “as if a human expert had looked at the data”.[1] ## Reception An extended review of version 4.46 in 2012 on the Silent PC Review website summarized, "The biggest drawback [to Speedfan] is it often takes a lot of work to properly configure", but continued, "Its highly customizable and incredibly powerful nature is unmatched by the competition and as a bonus, it's also free, lightweight and regularly updated with more features and better motherboard support."[8] The Softonic review of version 4.49 graded SpeedFan 8/10, listing it as useful, with "helpful charts to monitor performance and health", but noting that it requests administrator rights at launch, and "Can be intimidating for less tech savvy".[9] ## See also - [Argus Monitor](/source/Argus_Monitor) - Motherboard Monitor - [System monitor](/source/System_monitor) - [Comparison of S.M.A.R.T. tools](/source/Comparison_of_S.M.A.R.T._tools) - [lm_sensors](/source/Lm_sensors) - [hw.sensors](/source/Hw.sensors) ## References 1. ^ [***a***](#cite_ref-SpeedFan_home_1-0) [***b***](#cite_ref-SpeedFan_home_1-1) [***c***](#cite_ref-SpeedFan_home_1-2) [***d***](#cite_ref-SpeedFan_home_1-3) [***e***](#cite_ref-SpeedFan_home_1-4) [***f***](#cite_ref-SpeedFan_home_1-5) [***g***](#cite_ref-SpeedFan_home_1-6) ["SpeedFan - Access temperature sensor in your computer"](http://www.almico.com/speedfan.php). Almico.com. 12 October 2006. Retrieved 15 January 2007. 1. **[^](#cite_ref-2)** ["SpeedFan - History"](https://web.archive.org/web/20010405211823/http://www.almico.com/speedfan.php). Almico.com. Archived from [the original](http://www.almico.com/speedfan.php) on 5 April 2001. Retrieved 22 November 2013. 1. **[^](#cite_ref-ieee07_3-0)** Constantine A. Murenin (17 April 2007). "3.1. SpeedFan". [*Generalised Interfacing with Microprocessor System Hardware Monitors*](http://sensors.cnst.su/IEEE_ICNSC_2007). Proceedings of 2007 IEEE International Conference on Networking, Sensing and Control, 15–17 April 2007. London, United Kingdom: [IEEE](/source/Institute_of_Electrical_and_Electronics_Engineers). [doi](/source/Doi_(identifier)):[10.1109/ICNSC.2007.372901](https://doi.org/10.1109%2FICNSC.2007.372901). [ISBN](/source/ISBN_(identifier)) [978-1-4244-1076-7](https://en.wikipedia.org/wiki/Special:BookSources/978-1-4244-1076-7). IEEE ICNSC 2007, pp. 901—906. 1. ^ [***a***](#cite_ref-PCAdv_4-0) [***b***](#cite_ref-PCAdv_4-1) Martin, Jim (21 August 2013). ["How to check your CPU temperature: use the free SpeedFan utility"](http://www.pcadvisor.co.uk/how-to/desktop-pc/3465136/how-check-your-cpu-temperature/). [PC Advisor](/source/PC_Advisor). Retrieved 22 November 2013. 1. **[^](#cite_ref-5)** Gralla, Preston (30 August 2011). ["PC World Downloads - Speedfan 4.33"](https://web.archive.org/web/20120210101211/http://www.pcworld.com/downloads/file/fid,64350-order,0-page,1-c,systemresourcestuneup/description.html). [PC World](/source/PC_World_(magazine)). Archived from [the original](http://www.pcworld.com/downloads/file/fid,64350-order,0-page,1-c,systemresourcestuneup/description.html) on 10 February 2012. Retrieved 21 November 2013. 1. **[^](#cite_ref-6)** ["What's The Normal CPU Temperature Range While Gaming"](https://www.cputemper.com/maximum-and-normal-cpu-temperature/). *CPUTemper*. 20 June 2020. Retrieved 5 February 2022. 1. **[^](#cite_ref-7)** Savchenko (rarst), Andrey (7 August 2008). Brinkmann, Martin (ed.). ["Analyzing drive health with SpeedFan (4.34)"](http://www.ghacks.net/2008/08/07/analyzing-drive-health-with-speedfan/). Ghacks blog. Retrieved 22 November 2013. 1. **[^](#cite_ref-8)** Lee, Lawrence (2 July 2012). ["SpeedFan: A Guide to Universal Motherboard Fan Control"](https://www.silentpcreview.com/SpeedFan). silentpcreview.com. Retrieved 22 November 2013. 1. **[^](#cite_ref-9)** Leong, Lewis. ["SpeedFan (4.49)"](https://speedfan.en.softonic.com/). [Softonic](/source/Softonic). Retrieved 22 November 2013. ## External links - [Official website](https://www.almico.com/speedfan.php) --- Adapted from the Wikipedia article [SpeedFan](https://en.wikipedia.org/wiki/SpeedFan) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/SpeedFan?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.