Fix CPU fan speed error on boot [Asus, Megatrends]

by Madalina Dinita

Last update:April 21, 2020

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You can add a variety of cooling fans to your PC casing but the CPU fan is essential and irreplaceable.

That’s why it’s hard to ignore the CPU fan error on boot that some users keep getting.

That error usually points to either a malfunction of the CPU fan or underperforming in regards to RPM.

We have a few tips on how to resolve the error without too much hustle. Check them out below.

How can I get rid of CPU fan error?

1. Lower the default fan RPM in BIOS

1. Boot into BIOS on your PC.
2. Navigate to CPU Fan settings. The sections might differ based on your motherboards. Important thing is to look for anything related to the CPU Fan control, usually found in the Advanced settings menu.
3. Now, locate the setting that regulates RPM warnings. The default value should be around 600 RPM (rotations per minute).
4. Lower the default value to 300 RPM and save changes.
5. Exit BIOS and boot into the system.

The best free third-party tool for controlling and monitoring fan speed is SpeedFan. Get it here.

2. Disable CPU Fan speed monitoring in BIOS

1. Boot into BIOS.
2. Navigate to the aforementioned Advanced settings.
3. Look for the Monitoring (Monitor) section.
4. Change the CPU Fan Speed to Ignore and confirm changes.
5. Boot into Windows and look for improvements.

3. Check the hardware

• Check the fan connections. Inspect the motherboard connection.
• Remove the fan and clean the dust. You can use the pressurized air to clean it.
• Make sure that the cooling fan is spinning and it works as intended.
• To reduce the CPU temperatures, re-apply the thermal paste.

After that, all issues with CPU fan error on boot should be gone. However, if the issue persists, take your PC for diagnostics and repair.

Alternatively, you can also replace the cooler which isn’t exactly a complex task.

Still having issues? Fix them with this tool:

1. Download this PC Repair Tool rated Great on TrustPilot.com (download starts on this page).
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