Why Is My Computer Fan So Loud

Why Is My Computer Fan So Loud


Martha Davis
August 20, 2021

If your computer sounds like an F-15 about to take off, it could be that the fans inside your PC are overworked, or they need some fixing.

Fans usually run quietly during regular use. However, they do tend to get louder when doing heavy tasks such as gaming or video editing.

A noisy computer fan means your PC generates a lot of heat, which triggers the fan to do its job by clearing hot air to make way for cooler air. 

As we all know, a PC comprises several hardware components that generate a lot of heat.

They all generate immense heat from the graphics card to the processor and even the power supply unit.

So, to keep heat levels in check, your computer’s fans jump into action and start spinning, forcing the hot air out and cooling down your PC. 

As already mentioned, fans tend to make a lot of noise when you put your PC through intensive tasks like playing AAA video games, editing large multimedia files, or performing a CPU stress test. Now, this isn’t something to worry about as long as they calm down.

That said, if it sounds like a jet engine even during normal usage, they might be running in overdrive and need some fixing.

In this article, we’ll try to figure out why your computer fan gets loud, why it’s essential, and a few tips to reduce the noise.

Read on to learn more about why PC fans get loud and how to fix the problem.

Reasons PC Fan Goes Loud

CPU Fans

Multiple factors can lead to your PC fan making loud noises, most commonly dust and other debris being trapped inside the fan. Dust accumulates inside your PC cabinet, especially if you’ve got a massive gaming desktop.

In addition, debris such as pet hair and lint can pose a roadblock for fans from running correctly, eventually leading to excess noise.

Another common cause of noisy computer fans is heat.

Operating your PC in a non-ventilated room makes it difficult for cool air to pass through, making it hard for the fans to push the hot air out. In the process, they might get overworked and start making loud sounds. 

Besides, if your CPU has many heavy-duty computing responsibilities and hogs most of your system’s resources, it can easily cause your PC to heat up in no time.  Fans constantly spinning at maximum load to cool down the PC could signify that your computer is overheating.

Therefore, a noisy computer also points to heavy CPU usage

Besides, if the fans are loose and not fitted properly, they can create noise.

Finally, a fan making abrupt, loud noise can also indicate something wrong with the firmware update of the fan’s hardware component.

Should I Be Alarmed With PC Fan Noise?

CPU Fan Spinning Loudly

As already mentioned, fans tend to get loud during heavy tasks such as gaming and video editing. If they make excess noise even during normal usage, it points to problems that need fixing.

A fan’s job is to drive the hot air out to keep your PC cool, and a loud fan means it’s put under more stress than they’re supposed to. 

Loud computer fans are generally not a healthy sign and should be dealt with immediately. If your fans can’t effectively control heat levels inside your PC, it can lead to a range of issues.

For instance, you may start to experience a noticeable drop in your CPU’s performance because of excess heat, meaning it’s working too hard and eating way more than its fair share of resources. Overheating could also lead to your CPU shutting itself down to avoid permanent damage. 

How To Reduce PC Fan Noise

Thankfully, there are several workarounds to get rid of excess fan noise.

We’ve listed a few tips below that should help calm down that loud fan and improve your computer’s performance and lifespan.

Well Ventilated Room

Airflow PCs

To begin with, make sure you’ve placed your computer in a room where fresh air can reach your computer to help cool it down.

Besides, it’s also essential to check whether your computer’s fan does not get obstructed, especially by curtains or walls that could lead to overheating. 

Also, make sure you put your computer on a flat, stable surface such as a desk or floor so cool air can circulate.

Don’t keep your PC inside a cabinet or a drawer, as hot air would get trapped. Instead, make sure you’ve placed your computer in a place that lets cool air circulate the PC.

Besides, it’s best to put a little rubber foot underneath your PC to create a bit of space between the surface and the PC cabinet to allow for better heat dissipation.

Clean The Fan And Vents

Case Airflows

As obvious as it may sound, regular cleaning of your computer fan allows your PC components to work in harmony.

Depending on the age and usage, dust and debris build up around the fan, affecting its ability to cool your system’s internal components. With regular cleaning, fans operate at much higher efficiency and allow improved circulation of cool air.  

Before cleaning your fan, make sure you turn off and unplug all cables and wires from the main power.

A few sprays of canned air ought to do the job of throwing out dust or anything else. If possible, open your PC directly, and spray the canned air at an angle that dust does not go back in the PC cabinet. Desktop users would likely find other fans, such as for the CPU, GPU, and RAM.

To clear the dust, spray the fans in short bursts with your compressed air duster and clean the fans with a microfiber cloth.

The same goes with your power supply fan, as they also make excess noise when it gets too dusty. However, refrain from opening the power supply unit by yourself unless you know what you’re doing. Just a few sprays of canned air from the outside would do the job.

Last but not least, check for the thermal paste on your CPU and other components.

Thermal paste keeps a check on temperature by transferring CPU and GPU heat to their heat sinks. Unfortunately, over time, this paste wears down and loses its efficiency.

Hence, you should consider replacing the thermal paste if it’s aging or drained.

Finally, ensure all your fans are plugged back into the motherboard before closing your PC; otherwise, the fans won’t even switch on.

Once your fans are nice and clean, and you’ve put your PC back together, turn on your system to check whether your fans are working correctly. If you notice fans usually spinning without any noise, that means you’ve ticked every box in the checklist. 

However, if you still hear unusual or loud noises from your PC, they may be overworked, or it may be time to get them replaced. Before ordering new fans for your PC, make sure to check the fan’s size and dimensions.

Desktop fans use a common-sized fitting and plug directly onto your power supply or motherboard, making them easier to replace.

However, replacing laptop fans can become a hassle as they are specifically designed for particular laptop models to fit their much smaller chassis.

Fan Control Software And Performance Optimization Tools

Any extra stress or load on your fans can also cause excess noise.

There might also be software issues that could lead to unusual and loud noises from your computer.

For instance, maybe your hardware isn’t equipped to run the software you’re using. 

A dedicated fan control software and performance optimization tool would properly allocate your system’s resources.

These programs help identify programs that consume more resources than they’re supposed to and deactivates them.

In addition, fan control software such as Speed Fan allows you to see your current PC temperatures and adjust fan speeds, depending on the system’s demands, without tinkering with other settings.

Close Unnecessary Programs With The Task Manager

Multiple programs running in the background can cause the fans to get louder because of overheating.

It’s best to use your PC’s Task Manager to deactivate and shut down any unnecessary programs to reduce the workload on your PC components. 

Wrapping up

Regular cleaning on your PC works wonders to deal with a loud computer fan.

Besides, a regular PC maintenance routine also helps improve your system’s overall performance and increases the longevity of your PC components. 

That said, fans may not be the only culprit responsible for the noise coming out of your PC.

Other hardware components such as hard drive, CPU, and GPU can cause overheating and make your fans work overtime, causing loud noises and impacting the overall performance of your PC.

Therefore, a regular PC maintenance habit can go a long way to serve the performance and lifespan of your computer.   

As they say, prevention is better than cure. So our advice to deal with a noisy computer fan would be to ensure it doesn’t get loud in the first place. You can do so by following a regular maintenance habit.

We hope these tips help you keep a check on abrupt and excess computer noises for other scenarios.

Martha Davis

Martha Davis is a computer hardware specialist who works extensively in designing and manufacturing hardware devices, researching advanced computer technology. She built GadgetGangster.com as a platform to share her insight on computers and PC assembly with the web. Currently, she is carrying out her research on Robotics and Computer Vision and working privately to deliver services. Martha makes sure that readers of GadgetGangster.com master the basics of setting up computer components like motherboard, CPUs, and GPUs through the informative articles that she writes.