SpeedFan for Windows 10: Download and How to Use It

SpeedFan 4.52 is a free Windows hardware-monitoring utility that can read temperatures, fan speeds, voltages, and S.M.A.R.T. information from compatible hardware. The developer’s official download page still lists 4.52 as the latest version and explicitly lists Windows 10 and 64-bit Windows support.

SpeedFan is a legacy utility. It may read sensors on a PC without being able to change fan speed because software control also depends on the motherboard exposing compatible circuitry.

How to download and install SpeedFan on Windows 10

1. Open the official SpeedFan download page and download SpeedFan 4.52.
2. Run the installer and approve the Windows User Account Control prompt if Windows asks for permission.
3. Finish the installation, open SpeedFan, and wait for the initial hardware-detection scan to complete before changing settings.

The developer says the official installer and executable are digitally signed by SOKNO S.R.L. If a file claiming to be SpeedFan does not have that signature, do not use it. Prefer the original download page over third-party mirrors.

How to use SpeedFan

1. Identify the detected hardware and sensor readings

Start on the Readings tab, then open Configure to see the monitoring hardware SpeedFan found. Sensor labels are not always self-explanatory. The developer’s official FAQ recommends comparing readings with the BIOS/UEFI hardware monitor or the motherboard manufacturer’s utility because manufacturers can wire the same monitoring chip differently.

After identifying a sensor, press F2 to rename its reading for easier tracking.

2. Enable software fan control only when the motherboard supports it

To test fan control, choose Configure > Advanced, select the relevant hardware-monitor chip, and look for a PWM property such as PWM 1 mode. On compatible systems, it may offer a Software controlled value. Chip names and available PWM entries vary by motherboard.

Change one control at a time and verify that the intended physical fan responds. Leave Remember it disabled until you know the setting is correct. If no suitable PWM option appears, do not force it. The developer’s supported-hardware information notes that sensor monitoring and fan-speed control are separate capabilities.

3. Set temperature and fan-speed limits

In Configure > Temperatures, select the sensor that should influence cooling and set its desired and warning temperatures. In Configure > Speeds, set the minimum and maximum range for the related PWM control. There is no universal safe value for every CPU, GPU, fan, or case, so use the component manufacturer’s thermal limits instead of copying arbitrary percentages.

4. Build an automatic fan response curve

For finer control, use the Fan Control tab to associate a temperature source with a fan and define how fan speed should rise as temperature increases. The official Advanced Fan Control guide explains that the response curve also respects the minimum and maximum values set in the Speeds tab.

The guide also notes that a configured warning temperature can force the relevant PWM output to 100%. Test the curve carefully.

5. Turn on automatic fan speed and verify cooling

After the controls behave as expected, return to the main window and enable Automatic fan speed. Watch both fan RPM and temperature readings while the PC is idle and during a normal workload. If temperatures keep climbing or the wrong fan changes speed, disable automatic control and restore the previous settings.

6. Use Charts to watch sensor trends

The Charts tab plots temperatures, fan speeds, or voltages over time so you can see whether cooling responds as the system warms up.

7. Review S.M.A.R.T. data for compatible drives

The S.M.A.R.T. tab can show drive-reported attributes such as power-on hours or reallocated sectors when available. Treat it as supporting information, not a replacement for backups or manufacturer diagnostics.

Why SpeedFan may not control your fans

SpeedFan can detect temperatures and fan RPM without being able to change a fan. The official documentation explains that the motherboard must include and connect the circuitry required for fan control. If a percentage changes in SpeedFan but the physical fan does not respond, restore the original setting and use the motherboard’s BIOS/UEFI fan controls or its current vendor utility instead.

Is SpeedFan safe to use?

SpeedFan is safest when downloaded from the developer’s site and used cautiously. Reading sensors is low risk, but incorrect PWM settings can reduce cooling and cause overheating. Make small changes, verify the correct fan after every adjustment, monitor temperatures, and avoid saving automatic settings until the system behaves predictably.