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How To Lower CPU Temperature [Simple Guide]

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Do you find that your CPU (processor) temperature is way too high? Do you often reach temperatures above 90°C in game or even without doing anything? In general, do you find that your processor heats up too much?

In this article I will show you 7 tricks that will lower the temperature of your CPU.

In the rest of the article I will detail each trick and explain what they do and what are the advantages and disadvantages of each. You won’t need to do them all to get results, but I think if you try at least 2-3 tricks then you can lower your CPU temperature.

1) Change fan profiles

Most fans have what are called profiles that allow the speed to be managed according to the temperature of one or more components. The goal here will be to change the profile of the fans that cool your CPU to be more aggressive .

Very often, manufacturers default to “average” profiles in terms of noise but also performance, so the fan will not turn at its maximum. Worse I have already seen fans that are configured not to go beyond 50% of their maximum speed.

We therefore have a rather delicate situation, where your CPU can run at 95°C and the fans do not exceed 50% so as not to make too much noise…

We will therefore change profiles so that it goes to 100% as soon as the CPU temperature exceeds 90°C.

To do this, you will have to look according to your machine.

On fixed PCs, this will be done through the BIOS of the motherboard. Where you can change many other parameters and in particular the fan profile.

On laptops, it’s more tricky. Gaming laptops that are made for gaming and streaming  often have proprietary utilities to manage CPU and GPU fans.

Otherwise you can download third party software like Speed ​​Fan  to change this in windows.

Increasing the fan speed can lower the temperature by 5-10°C just with this adjustment.

2) Clean your PC

Dust accumulation is one of the primary causes of component overheating. Indeed the dust will accumulate everywhere on your PC preventing a good circulation of the air in this one.

The most important thing is to clean the heatsink fins of your CPU. The dust that has accumulated there will prevent fresh air from circulating between the fins and therefore the hot air will stagnate, which will have a very negative impact on the dissipation capacities of your cooler.

Finally, clean the air inlets and outlets to facilitate air circulation. To do this, clean the grids of your PC and the dust filters.

The best is to use a can of compressed air and/or a vacuum cleaner. But the bomb will be more effective.

With a good cleaning you can gain up to 5°C less on your CPU.

3) Increase the airflow in your case

If your PC case is poorly ventilated, you will have to think about investing in fans to put on your case. As a priority , add fans to evacuate the hot air from your case, I am especially thinking of a fan at the back of the case (a selection of the best fans for PC cases) which will allow the heat to be evacuated .

Also add fans to the top of your case . The hot air being lighter it will tend to rise, and thus facilitate the natural movement of the air will allow to increase the flow even more.

Finally add fans at the entrance to increase the flow of fresh air. This I have always noticed that evacuating hot air has more impact on temperatures than adding fresh air.

Consider using fans that have a good reputation. In my opinion, the best are the Noctua which you can find everywhere online.

Be careful to get airflow optimized fans like this one from Noctua.

You can also take other brands like Corsair, be Quiet etc.

4) Change thermal paste

The thermal paste is used to facilitate contact between the CPU and the coolers. This is what binds the two together. We need to use thermal paste because the contact between the CPU and the heatsink is not perfect.

And therefore the heat transmission is therefore greatly reduced. The thermal paste makes it possible to link the two and therefore to increase the quality of the contact. The heat transfer will therefore be more efficient and therefore the CPU will be better cooled.

Sometimes thermal paste dries out after several years and therefore its ability to transfer heat decreases. The CPU therefore heats up more over time.

The other possibility is that the manufacturer of your laptop has decided to use low-end thermal paste to save a few cents on production costs.

Either way, changing the thermal paste will lower your PC’s temperatures .

However, it will be necessary to dismantle the coolers and this is not necessarily very accessible, especially on laptops. On a fixed it is often much simpler but depending on the cooler it can be more difficult.

5) Change CPU cooling

If, despite the 4 tips above, you still have temperatures that are too high, it means that your cooling is not adapted to the CPU you have taken. You will therefore have to change the cooler or opt for a watercooling AIO if you wish.

Which one you should choose will depend on the CPU you want to use and your case.

Concretely, a high-end CPU will need a high-end cooler like the Noctua NH-D15, which I recommend for all high-end configs. Otherwise a watercooling AIO with a 280mm radiator will do.

I made some guides for the most famous processors like the Intel Core i9 10900K , the Intel Core i7 10700K , Ryzen 9 3900X and Ryzen 7 3700X .

Otherwise I have a complete and detailed article on the best CPU coolers , or I give you the exact model to take according to your processor!

You also don’t need to take overkill cooling for your CPU, it won’t increase its performance.

The cooling change is the thing that can radically change the temperatures on your machine , so you gain a few tens of degrees by upgrading your cooling.

6) Remove parts of the chassis

The design of your PC case can have a significant impact on the quality of PC cooling.

Indeed, some boxes, although very beautiful, have very poor thermal performance. This is mainly due to the use of materials such as tempered glass as a front or fronts with many filters and barriers preventing air from easily entering the case.

All this prevents cool air from entering and hot air from being easily exhausted.

One solution is to remove parts of the case altogether to improve flow .

The glass front panels or the main panel are good candidates to test .

That said, this technique is especially effective on laptops. On laptops, the panel that protects the bottom of the PC can be removed to gain a few degrees.

Of course, it’s not aesthetic to have a gutted PC, but it’s better than burning your CPU and motherboard with…

7) CPU undervolt

This is the most technical and also the most effective trick to gain degrees on your CPU.

Indeed you can have the best case in the world with the best ventilation and the best cooler possible, if your CPU has too high an operating voltage it will heat up excessively. 

Undervolting therefore consists of lowering the operating voltage of the CPU to lower the heating.

Undervolting can be done on fixed and portable PCs.

On fixed PCs you will still have to rummage through the BIOS to change the supply voltage, we will mainly be interested in the VCore.

WARNING, if you put a voltage too low your PC may not be able to restart correctly. It’s no big deal just reset your BIOS settings.

On laptops, you will have to go through software solutions. For PCs with Intel processors, XTU is the most used. It allows to overclock and also to undervolt the CPU at its guide directly under Windows no need to go rummaging in the bios..

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Peter Shevlin

I am interested in science and technology in all their forms. Geek by birth, gamer by adoption, I sublimate my passions in my work and compulsively test all electronic equipment (PC, mobile, audio photo video) and all software (Android, iOS, macOS, Windows).

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