A noisy CPU fan could be due to dust buildup, a loose connection, or a failing fan. You should consider cleaning your computer's internal components, checking for loose cables, and replacing the fan if necessary to reduce the noise and prevent overheating.
1. Check the Basics
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Restart your PC → Sometimes the fan ramps up due to stuck background processes.
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Close heavy apps (games, video editing, many Chrome tabs).
2. Clean the Fan (Most Common Fix)
Dust buildup makes the fan loud.
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Power off the PC.
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Open the casing.
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Use compressed air (or a soft brush) to clean:
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CPU fan
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Heatsink
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Case vents
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Ensure cables aren’t touching the fan blades.
3. Check Fan Placement
A misaligned or wobbling fan makes noise.
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Make sure the screws are tight.
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Ensure the fan is not loose.
4. Apply New Thermal Paste
If your CPU overheats, the fan runs at max speed.
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Remove old thermal paste.
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Apply a small pea-sized drop of new paste.
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Reinstall the cooler.
5. Adjust Fan Curve in BIOS
You can make the fan run quieter.
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Restart > press DEL or F2 to enter BIOS.
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Look for Hardware Monitor / Fan Control.
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Set Silent Mode or adjust the fan curve manually.
6. Replace the Fan (if grinding noise)
If you hear:
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Grinding
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Clicking
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High-pitched whine
The fan bearing might be worn out.
Replace the CPU cooler or just the fan if it’s detachable.
