How to Fix or Silence a Noisy CPU Fan

How to Fix or Silence a Noisy CPU Fan

A number of components can make noise inside your computer for example, cooling fans, CD/DVD or any other disc drive you are using, hard disk drive, power supply, the casing especially for clone computers if loose. The kind of noise we are talking of here is the funny, irritating, alarming loud noise, depending on the individual, that comes from your CPU fan.

Thermal Paste

Thermal paste (comes in different containers)
Thermal paste (comes in different containers) | Source

Using Thermal Paste to Silence a Noisy CPU Fan

The CPU noise is usually a loud noise like that of a vacuum cleaner, or a car accelerating and it only happens for a brief period of time then it is gone only to happen again. Sometimes it is so loud and intense that you will see people starring alarmingly at the computer as if it is going to burst.

This kind of noise usually occurs when your processor overheats. This overheating, which can destroy your processor, happens because the CPU and the heat sink are not making 100% contact with each other. This 100% contact is important because the excess heat produced by the processor must be absorbed by the heat sink and then dissipated to outside environment. The work of the CPU fan in your PC is to remove the hot air and bring in some cool air; this cool air then literally cools the heat sink which in turn cools the processor.


Processor and heatsink
Processor and heatsink | Source

So How Do We Fix This Noisy Fan?

First of all you have to make sure that the fan is okay, this can be done by checking it physically. After determining that the CPU fan is okay, you will need to buy a thermal paste. Yes! Thermal paste, heat sink compound, thermal gel, thermal compound and also known by other names, will do the trick.

This thermal paste is a fluid substance (very similar to toothpaste), used for enhancing thermal conductivity between two thermal conductors. This thermal interface material fills the invisible gaps between the CPU and the heat sink and since the thermal paste conducts heat better than air, it ends up improving greatly the thermal conductivity of your processor.

Preparing to Apply Thermal Paste

You will need to open your system unit cover to access your processor. This is after turning of your computer and removing the power cable from the wall socket. I suggest you can take this chance to blow or vacuum the dust that has accumulated in your computer for the last ... This is in case you have not carried out any computer preventive maintenance lately.

CPU fan Clips

CPU fan Clips, they vary depending on the design
CPU fan Clips, they vary depending on the design

How to Apply Thermal Paste

To access your processor; you will have to remove the fan and heat sink first. The two are usually fixed together. The heat sink is usually held into position by clips, observe them keenly how they have been hooked before unhooking them. There are some types that uses screws. Having done that, you will be able to see your processor; you don’t have to remove it, unless you just want to have a look at it. Wipe off any previous heat sink compound. Apply the paste evenly on top of your processor surface. You can make use of a small brush and if not available you can improvise something to use.

After that, return your heat sink and hook it back firmly. Connect everything back and power on your system. If it powers on properly that means you have not messed with your system and you have fixed your noisy CPU fan.

Have you ever encountered a noisy CPU fan?

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© 2011 Patrick Kamau

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Comments 11 comments

Patkay profile image

Patkay 6 months ago from Nairobi, Kenya Author

Alex there are a number of things that could be causing this, unfortunately you have not stated if it shows anything on the screen when you power it up. However trying doing this;

1. check if the RAM is seated properly

2. Try any other RAM

3. still the same problem check the video or graphics card , if any

4. if no graphics card and problem recurs, clear your CMOS by removing battery and returning it again

5. still problem , check the processor heat sink

7. still problem then suggesting checking motherboard and processor

Remember that also messing with the video drivers can cause such a problem.

alex 6 months ago

my cpu boots but and after sometimes it shows a black scree what could be the problem

Patkay profile image

Patkay 5 years ago from Nairobi, Kenya Author

Thanks josiejossy. Just try it out. It will also solve the problem of a computer hanging or freezing due to overheating of the processor.

josiejossy profile image

josiejossy 5 years ago from Nairobi Kenya

Great hub, thnx for sharing, i had a noisy one bt now after reading this am gona fix it. Its Wow

lyns profile image

lyns 5 years ago from USA

You're welcome and thanks for sharing the information as well, have a good one I look forward to reading many more of your hubs in the future. Have a good one

Patkay profile image

Patkay 5 years ago from Nairobi, Kenya Author

Thanks lyns for reading and commenting on my work. I hope you will check my other works.

lyns profile image

lyns 5 years ago from USA

Very good information Patkay, thanks for sharing, have a good morning. lyns

Patkay profile image

Patkay 5 years ago from Nairobi, Kenya Author

Good, lucy patrick, check the rest of my hubs and you will enjoy.

lucy patrick 5 years ago

i learned a lot from your hub

Patkay profile image

Patkay 5 years ago from Nairobi, Kenya Author

Thanks nenytridiana, for reading and commenting.

nenytridiana profile image

nenytridiana 5 years ago from Probolinggo - Jawa Timur - Indonesia

A useful information. Thank you.

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