SpeedFan

Name: SpeedFan
Author: SpeedFan

by SpeedFan

Free plan Windows

Visit SpeedFan Alternatives Pricing

What SpeedFan is

SpeedFan is free Windows software for monitoring hardware and controlling fan speeds when compatible circuitry is available. It reads voltages, fan speeds, and temperatures through hardware monitor chips, and can adjust fan behavior according to system temperatures to reduce noise. For storage, it reads S.M.A.R.T. information and hard-disk temperatures, with support for SCSI disk health and statistical data. Its “In-depth online analysis” compares a drive’s S.M.A.R.T. data with a model derived from millions of reports. The maker lists software RAID support and compatibility with ARECA, CSMI, and AMCC 3ware controllers, while noting that dependable RAID access depends on hardware-maker support. The download page lists Windows 9x, ME, NT, 2000, 2003, XP, Vista, 7, 8, 10, and Windows Server 2003, 2008, and 2012, including 64-bit systems. Version 4.52 is the latest listed release. SpeedFan is aimed at power users, who are advised to observe its behavior before leaving it unattended. The maker cautions that motherboard access may not suit every system.

Who it suits

It suits power users who need Windows hardware, temperature, fan, or disk-health readings. Fan-control use requires a motherboard with suitable control circuitry.

What it does well

Free Windows software
Monitors voltages, fans, and temperatures
Reads S.M.A.R.T. disk information
Online analysis uses millions of reports
Supports custom events

What to know first

Fan control needs compatible motherboard circuitry
Latest listed version is 4.52
Maker cautions against unattended configurations
Hardware access may not suit every system

Plans

Plan	Billed and limits	Price
SpeedFan	Costs nothing · Windows software · Fan control depends on compatible hardware	Free

As almico.com lists them, read 9 Oct 2026. The maker's own page has the final word.

Verdict

SpeedFan combines hardware monitoring, disk-health readings, and conditional fan control at no cost. Its power-user focus and hardware compatibility requirements make careful configuration important.

Facts from SpeedFan's own pages

Configuration and support: The maker says users can create custom events and contact Alfredo Milani Comparetti by email with questions, suggestions, or reports of unusual behavior. · almico.com, 9 Oct 2026
Disk health: It reads S.M.A.R.T. information and hard disk temperatures, and supports SCSI disk health and statistical data. · almico.com, 9 Oct 2026
Fan control: It can change fan speeds according to system temperatures to reduce noise, when the hardware supports control. · almico.com, 9 Oct 2026
Founded: 2000 · almico.com, 28 Sept 2026
Free plan: Yes · almico.com, 21 Sept 2026
Hardware compatibility limit: Changing fan speeds requires suitable motherboard circuitry, which the maker says is not included on every motherboard. · almico.com, 9 Oct 2026
Hardware monitoring: SpeedFan monitors computer voltages, fan speeds, and temperatures using hardware monitor chips. · almico.com, 9 Oct 2026
Intended user: The maker describes SpeedFan as a tool aimed at power users and advises watching its behavior before leaving it configured unattended. · almico.com, 9 Oct 2026
Latest listed version: The maker’s download page lists SpeedFan 4.52 as the latest version. · almico.com, 9 Oct 2026
Online analysis: Its “In-depth online analysis” compares hard disk S.M.A.R.T. data to a model derived from millions of reports. · almico.com, 9 Oct 2026
Safety limitation: The maker cautions that accessing motherboard resources may not suit all hardware and says it cannot be held responsible for system damage. · almico.com, 9 Oct 2026
Security: The maker says the installer and executable are digitally signed with SOKNO S.R.L.’s certificate and warns that an unsigned download is not SpeedFan. · almico.com, 9 Oct 2026
Storage and RAID support: The maker lists support for software RAID, ARECA, CSMI, and AMCC 3ware controllers, while noting reliable RAID access depends on hardware-maker support. · almico.com, 9 Oct 2026
Supported platforms: Windows · almico.com, 21 Sept 2026
Windows compatibility: The download page lists Windows 9x, ME, NT, 2000, 2003, XP, Vista, 7, 8, 10, and Windows Server 2003, 2008, and 2012, including 64-bit systems. · almico.com, 9 Oct 2026