What does a CPU Cooler do?

Are you looking for the answer to what does a CPU cooler do? Then don’t search further. You are at the right place. Here in this blog post, you will get to know every detail about the function of the cooler, such as how it works and keeps the system cool and prevents it from overheating.

If you are a beginner and need to learn about the CPU cooler, let me tell you what the CPU cooler is. CPU coolers are an essential part of the CPU. They help to keep the temperature of the computer lower. CPU coolers are necessary for all computers, especially those used for overclocking because of high-end games or general purposes.

If you overclock your system, I am sure you have been facing problems caused by overheating, like your CPU will shut down, disrupting your work, or it can crash your system. CPU coolers keep the computer cool and then work smoothly and efficiently. If you have been using your system for a long time and want to know how much it has been overheated, you can check it from the computer’s control panel. The control panel will show the temperature of the system in degrees Celsius.

Table of Contents

The Principle of CPU Coolers:

 The main principle of CPU coolers is the transfer of heat. The processor produces the heat, and the cooler takes that heat and dissipates the heat across all parts of the CPU. The CPU cooler comprises a fan, a radiator, and other components. These parts help the accumulated heat to move away from the essential elements of the CPU without any damage to them.

The working principle of the coolers is the same for all the coolers, but the cooling process can differ for various coolers. The air molecules surrounding the hot object get heated by the transfer of heat from it.

What is a CPU Cooler for?

The CPU is the computer’s brain and has to perform much work for which its components become heated frequently. To perform efficiently and smoothly, the parts of the CPU need to be cooled down and restricted from overheating.

The CPU coolers help you prevent overheating of the CPU. As the CPU is an essential part of the system, if it gets damaged, everything will stop working. You want your work to continue because of some minor mistake that results in significant issues.

CPU coolers cool the CPU components by transferring the heat the processor generates. CPU cooler moves the accumulated heat from a hot object, making it cool to work more correctly and effectively.

You can even overclock your system when using a high-quality cooling system that can make the system run smoothly and without any hindrance.

How does a CPU Cooler work?

The CPU must work in seconds as the system’s central processing unit. Due to heavy load, the CPU gets overheated easily. The overheating can cause damage to the delicate components. Maintenance of the CPU cooler can increase the life span of the CPU and reduce the risk of damage to the computer. Here is the process of working on the cooler:


The heat transferred to air molecules around the hot object results in the cooling down of the CPU parts. The heated air molecules move out, allowing cool air to replace them to absorb more heat from the heated objects. The cooler fan helps to perform the transfer process function more speedily. The faster the air moves, the cooler the system becomes.

Heat Sink:

The heat sink is a piece of metal designed for heat conduction. The base of the heat sink is attached to the CPU, and the upper surface of the heat sink is composed of many fins with air channels that provide ample surface area to the moving air. The large surface area helps in convection cooling as the dissipated heat has a large surface for moving across the air channel.

Variable Speed:

The main feature of the modern CPU is variable speed control. The fan in the cooler is directed to slow down and speed up on its own. When performing graphically intensive work, you will hear the sound of the speed-up spinning of the cooler’s fan.

You will not hear the spinning sound when operating the computer for general purposes, with no highly intense work. If you hear the spinning sound while doing less intensive work, then it is a sign of danger. You need to check the cooler and the processor to see whether they are operating well.

Effective Cooling:

You must take good care of the cooler to make your system last longer and run smoothly with maximum efficiency. It is better to do maintenance than replace the computer parts more often. It’s a good idea to use compressed air for dusting the CPU cooler and remove the dust particles from them for their long life.

Ensure the power is cut off from the CPU before dusting or cleaning the cooler. To increase the viability of the cooler’s fan, it needs to be cleaned frequently, and there should be no obstruction for the inflow and outflow of the air.

Types of the Cooling System:

Cooling systems cool down the CPU to prevent your computer from running slow and disrupted. Two different types of cooling systems come by default in CPUs.

Air cooling system:

It is the most common and straightforward cooling system used in the CPU. This cooling system has fans of various types that blow the air across the CPU to keep the temperature low.

Liquid cooling system:

This system is expensive but practical, mainly if you use your computer for overclocking. This system is composed of tubes or pipes in which liquid runs. The line circulates throughout the system and absorbs heat from different parts. The liquid system is used when cooling fans are insufficient for the CPU.


The CPU cooler is a vital component of the processing unit. It keeps the CPU cool from overheating and prevents damage to delicate parts. It only helps in cooling but also improves the performance of the CPU.

Overclock CPU needs the cooler to function correctly and run smoothly with the heavy load. All modern computers come with built-in coolers to cool down the parts of the computer. Maintenance of the cooler is also necessary to run effectively and make the computer last longer.

The cooler type depends on the work taken from the computer. If highly intense work is done, then a high-quality cooler is recommended.

I hope you find this blog about what a CPU cooler does helpful and worthy.

Frequently Asked Questions

Is a CPU cooler necessary?

Yes! It is necessary for all of the CPUs. In fact, every CPU comes with built-in coolers to keep the processing unit cool down.

Why is a Cooling system necessary for a CPU?

The heating up of CPU components depends on the intensity of the workload. The more intense the workload the CPU has, it the more effective and suitable the cooling system for efficient performance.

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