Computer Components

Why is My PC Fan Making Weird Noises?

Types of Noises

Grinding/Scraping: Sounds like something is stuck in the fan blades, it might be a broken fan or the fan bearings are failing.

Clicking: Could be a loose cable or component lightly tapping the fan blades as they spin.

Rattling: Might be a loose fan, a damaged fan housing or something vibrating in your PC case.

High pitched Whining: It happens when a fan is running at max speed constantly. Could be a sign of overheating or a failing fan.

How to Fix The Noise

Visual Inspection: Shut down your PC and open the case. Look for:

Obstructions: Any stray cables, dust packs or small objects that might be hitting the fan.

Loose Parts: Screws, components and wobbly fans. Tighten anything loose.

Broken Bits: Check for cracked fan blades or damage to the fan’s housing.

Clean It Out: Over time dust builds up everywhere. Use compressed air to blast dust off fans, heatsinks and other components. Be careful, too much force can damage parts. Don’t do this while your computer is running and plugged in. Shut it down and unplug it from power first.

Check Temperatures: Use software like HWMonitor or SpeedFan to see your CPU and GPU temperatures. If they’re running very hot your fans are working too hard and they get noisy. This means that you have deeper cooling issues.

Manage Fan Speeds: Many motherboards have dedicated software that let you control fan speeds. Try lowering your fan speeds slightly if the noise bothers you and your temperatures stay within reasonable thresholds.

Consider Replacement: If your fan is damaged, makes a constant grinding noise or adjusting speeds doesn’t help, it’s time for a replacement. Fans are pretty cheap and reasonably easy to change anyway.

Other Possibilities

Hard Drive Noises: Hard disk drives (HDDs) can sometimes make clicking or whining sounds, especially older ones. Differentiate these from fan noises. If it’s your HDD making the noise then there is nothing to worry about.

Coil Whine: This is a high pitched noise from your power supply or graphics card usually while under heavy load. It’s more annoying than dangerous.

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