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SpeedFan screenshot.png
SpeedFan 4.44 in Windows 7
Original author(s)Alfredo Milani Comparetti[1]
Developer(s)Alfredo Milani Comparetti
Initial release27 March 2001; 20 years ago (2001-03-27)[2]
Stable release4.52 (29 June 2016; 4 years ago (2016-06-29)) [±]
Preview release4.51 beta 2 (7 August 2014; 6 years ago (2014-08-07)) [±]
Written inDelphi, C++, C[citation needed]
Operating systemWindows 95 and later[1]
TypeSystem monitor

SpeedFan is a system monitor for Microsoft Windows that can read temperatures, voltages and fan speeds of computer components.[3] It can change 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.[1][4][5] Fully configurable user events can be defined to execute specific actions based on system status.

Hard disk support[edit]

SpeedFan also monitors S.M.A.R.T. readings for EIDE, SATA and SCSI hard disks. Starting with version 4.35, SpeedFan fully supports Areca RAID controllers. Version 4.38 added full support for AMCC/3ware SATA and RAID controllers.[1]

Hard disk in-depth online analysis[edit]

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.[6] Messages inform the user of specific situations and problems, which Almico says is “as if a human expert had looked at the data”.[1]


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 configure properly," but continued, "Its highly customizable and compelling 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."[7] 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".[8]

Current alternatives to SpeedFan include Open Hardware Monitor, Motherboard Monitor and RealTemp, and much vendor-specific software (i.e., motherboard, hard drive, etc. utilities supplied by the vendor).

See also[edit]


  1. ^ a b c d e f g "SpeedFan - Access temperature sensor in your computer". Almico.com. 12 October 2006. Retrieved 15 January 2007. CS1 maint: discouraged parameter (link)
  2. ^ "SpeedFan - History". Almico.com. Archived from the original on 5 April 2001. Retrieved 22 November 2013. CS1 maint: discouraged parameter (link)
  3. ^ Constantine A. Murenin (17 April 2007). "3.1. SpeedFan". Generalised Interfacing with Microprocessor System Hardware Monitors. Proceedings of 2007 IEEE International Conference on Networking, Sensing and Control, 15–17 April 2007. London, United Kingdom: IEEE. doi:10.1109/ICNSC.2007.372901. ISBN 1-4244-1076-2. IEEE ICNSC 2007, pp. 901—906.
  4. ^ a b Martin, Jim (21 August 2013). "How to check your CPU temperature: use the free SpeedFan utility". PC Advisor. Retrieved 22 November 2013. CS1 maint: discouraged parameter (link)
  5. ^ Gralla, Preston (30 August 2011). "PC World Downloads - Speedfan 4.33". PC World. Retrieved 21 November 2013. CS1 maint: discouraged parameter (link)
  6. ^ Savchenko (rarest), Andrey (7 August 2008). Brinkmann, Martin (ed.). "Analyzing drive health with SpeedFan (4.34)". Ghacks blog. Retrieved 22 November 2013. CS1 maint: discouraged parameter (link)
  7. ^ Lee, Lawrence (2 July 2012). "SpeedFan: A Guide to Universal Motherboard Fan Control". silentpcreview.com. Retrieved 22 November 2013. CS1 maint: discouraged parameter (link)
  8. ^ Leong, Lewis. "SpeedFan (4.49)". Softonic. Retrieved 22 November 2013. CS1 maint: discouraged parameter (link)

External links[edit]