5 Best 240mm AIO CPU Cooler – Expert Reviews

Best 240mm AIO CPU Cooler

You love your PC, and you want to run it as optimal as possible. Then you may wish for an AIO CPU cooler – a liquid CPU cooler that lets you keep your CPU as cool as possible when you are gaming or rendering.

In this guide, we will take a look at the five best 240mm AIO CPU coolers. We already covered a 120mm AIO cooler, which you can check. However, the 120mm AIO cooler is primary and provides decent cooling for low or medium range CPUs. If you want a better cooling performance, you need to have a better AIO cooler, i.e., 240 mm.

If you do not know what AIO liquid cooler is, you soon will.

It is a combination of a water block, pump, radiators, fans, tubes, and fittings. That’s why it is known as all in one.

Performance wise, liquid CPU coolers are always better options than air coolers, but they come with their own risk. As they contain liquid, there is still a chance of them getting spilled over. But, the risk is very minimal. And, if something goes wrong, most of the manufacturers provide coverage over the damage.

So, where it leaves you? Should you buy one? Well, sure, you do! As the risk is low and the benefits are immense. You can play your games or do heavy rendering jobs and not worry about temperates.

The 240 mm AIO liquid coolers offer better temperature compared to the 120 mm solutions in the market. However, they also cost more.

To help you purchase the best 240 mm AIO liquid cooler, let’s go through the things you need to keep in mind while getting it.

240 mm AIO CPU Cooler: Things to Look for

As a user, you should do proper research before buying a 240 mm AIO cooler. So, what things you need to keep in mind before getting one? Let’s go through them below.

  1. Firstly, decide if you need a 240 mm AIO cooler or not. In most cases, a good air cooler will suffice, and you may want to consider it. If you have made up your mind to get an AIO cooler, then read the next points!
  2. Make sure that you have proper clearance for mounting the AIO liquid cooler. The first thing that you need to check is whether your case is big enough to install one. 240mm radiators are also significant, so you need to calculate the clearance before doing getting one.
  3. Furthermore, you also need to check if the AIO cooler supports the socket type of the CPU you are using. Most modern liquid CPU coolers are compatible with both Intel and AMD processors.
  4. Next, you need to see the mounting that the 240 mm AIO supports. Is it vertical or horizontal? In the case of standing, you need to adjust your PC case airflow from front to back. If horizontal, you can choose to make your PC case airflow from back to upward or from top of the end.
  5. Do you love RGB? Well, if you do, then check that the AIO cooler supports RGB. We know that it will not affect the cooling performance, but RGB now offers aesthetic value to builds. You may also want to check if the RGB can be turned ON or OFF. This will give you flexibility in the future if you decide to turn it off.
  6. Another thing that you need to take care of is cooler longevity. The manufacturers market their AIO cooler to last at least eight years. But in reality, it lasts 6-7 years. In any case, you are getting a lot of value with a decently priced 240 mm AIO liquid CPU cooler.
  7. Lastly, you need to look at your budget. 240 mm CPU coolers are costlier than their 120 mm counterparts.

5 Best 240mm AIO CPU Cooler

Corsair H100i RGB PLATINUM AIO Liquid CPU Cooler

Corsair H100i is an excellent RGB lighting powered AIO cooler. We are discussing here the platinum series that delivers the best in performance. As it offers a 240 mm radiator, it has two 120 mm fans.

To ensure the best cooling, it uses the 120 mm ML PRO series fans. These fans are RGB and have levitation PMW fans. The fans are of high quality and provide the right RPM with less noise.

The airflow offered by Corsair H100i 240 mm AIO is 75 CFM, which is more than enough for a modern processor. The noise, on the other hand, is 37.0 decibels.

You can also use the Corsair iCUE software to control the AIO, including its RGB lightning and fan speeds.

What We Liked

  • Excellent RGB implementation
  • Magnetic levitation PWM fans
  • Intuitive Corsair iCUE software

What We Disliked

  • Slightly noisy at default speed
  • Slightly costly

Key Features

  • Socket compatibility: LGA 115x, 2011, 2066, 2011-3, 1366, and AMD, AM4, TR4, FM2, FM1, AM2, and AM3
  • Fan Speed: 75 CFM
  • Noise level: 37.0 decibels
  • RGB: Yes!

NZXT Kraken X53 240mm

We always love NZXT products, and their NZXT Kraken X53 240 mm AIO is another unique cooler for CPU. It is reasonably priced, which makes it much more appealing. The design is clean and can be used in both RGB and non-RGB builds.

You do not have to worry about the pump rotation as the infinity mirror ring LED is auto-adjustable and will show the logo in the right orientation. Moreover, the mirror has seen an upgrade over Gen 2 and is bigger and brighter.

Just like other 240mm AIO coolers, this one also offers full control over the fan using CAM. Yes, it is full integrated with it, and you can control how the Kraken as per your liking.

But what about installation? Well, it is easy to install thanks to good durability and protection against mishandling. You can use NZXT Kraken X53 liquid CPU cooler on all the modern AMD and Intel sockets.

What We Liked

  • Protection against mishandling
  • Great durability
  • Clean design and better LED
  • Easy to install

What We Disliked

  • Can be incompatible with some motherboards
  • Sometimes it doesn’t connect with CAM for some users.

Key features

  • Socket compatibility: Intel socket LGA 1155, 1150, 1151, 1366, 2011-3, 2011, 2066, TR4
  • Fan Speed: 18.28 – 73.11 CFM
  • Noise level: 21-36 Decibels
  • RGB lighting: Yes

Corsair Hydro Series H100i PRO RGB AIO

If you are looking for the absolute best AIO cooler in a 240mm category, then Corsair H100i Pro RGB might be worth your time. In terms of design, it offers a square-based pump rather than the circular design.

It also comes with RGB lighting, where you can choose the color of your liking. So, if you are building your RGB machine, then the AIO is a perfect fit with its dynamic multicolor RGB lightning.

Each of the 120mm fans is capable of doing 75 CFM. Also, the noise level is slightly on the higher side, with 37 decibels. But, the good thing is that it has zero RPM mode, which is great for silent operation. So, if your PC is not doing any rendering or gaming, then it can result in no noise level.

The radiator dimensions are 276mm x 120 mm x 27mm, whereas the fan’s dimensions are 120 mm x 25 mm.

What We Liked

  • Low noise performance
  • Silent operation mode
  • Great RGB lightning
  • Good cooling performance

What We Disliked

  • The instruction manual is not detailed
  • Installation can be slightly challenging

Key Features

  • Socket compatibility: Not compatible with TR4, otherwise compatible with other modern Intel and AMD sockets
  • Fan Speed: Offers zero RPM mode, 75 CFM per fan
  • Noise level: 37.0 decibels. Also offers silent operation
  • RGB: Yes!


We have covered the ASUS ROG RYUO in the 120 mm AIO category. It makes it come back again here in the 240mm category due to its excellent cooling performance. It’s arguably the best 240mm AIO that offers reliable liquid cooling.

Firstly, it offers Aura Sync support that means if you have an Asus motherboard, you can sync RGB with the system. It provides a precise PMW pump that provides adequate cooling and less noise. It is also tuned for good airflow under different circumstances.

To optimize cooling performance, it offers airflow up to 81 CFM. The noise levels are slightly on the higher side at 37.6 decibels, but you can control it using the Asus Livedash software controls.

Lastly, it utilizes a 1.77″ full-color OLED, which can be used to showcase custom personalized logos or system stats! You can use the ASUS Live Dash solution to make the changes.

What We Liked

  • Aura Sync support
  • Clean design
  • Good closed-loop design

What We Disliked

  • Costly than other similar performance 240mm AIOs

Key Features

  • Socket compatibility: All modern Intel and AMD socket support
  • Fan Speed: 81 CFM
  • Noise level: 37.6 decibels
  • RGB: Yes!

Corsair iCUE H100i RGB Pro XT, 240mm Radiator

Corsair offers many different designed AIOs available in the market. One of their premium offerings includes the PRO XT Series that provides excellent cooling performance without breaking the bank. Yes, it is affordable compared to other AIOs in this category.

The fans used on the radiator are magnetic. This means that they provide good CFM without the need to be too noisy. In terms of RGB, the AIO offers 16 individually addressable RGB LEDs that give you complete control over how your AIO looks and feel.

The speed of the fans can be adjusted from 400 to 2400 RPM. Moreover, it also supports Zero RPM mode, which provides you utterly silent operation. Just like other Corsair AIOs, this one can also be controlled using Corsair iCUE software.

The installation process is simple, and you get a wide CPU socket compatibility with both AMD and Intel.

What We Liked

  • Simple and easy to install
  • Great RGB
  • Nice CFM and adjustable noise value

What We Disliked

  • Makes noise at full RPM

Key Features

  • Socket compatibility: All modern Intel and AMD sockets
  • Fan Speed: 400 to 2400 RPM
  • Noise level: 37.6 decibels
  • RGB: Yes

CoolerMaster MasterLiquid ML240L 

Cooler Master MasterLiquid ML240L offers a budget liquid CPU cooling solution for your PC. With it, you can easily make your PC stay cool during intensive operations while looking good with RGB support. RGB lighting is entirely customizable.

As it is a 240mm AIO, it comes with two high-quality 120mm fans attached to the radiator. The Cooler Master ML240L uses anti-leaking technology to ensure that your setup doesn’t suffer from a liquid spill.

Moreover, the pc cooler water cooling is further improved through better contact with the fans on the radiator. The closed-loop used here is also efficient in carrying the heat across the unit.

What We Liked

  • Great cooling out of the box
  • Good closed-loop
  • Uses spill-proof design

What We Disliked

  • The default fans are noisy

Key Features

  • Socket compatibility: Compatible with all AMD and Intel socket expect TR4
  • Fan Speed: 1700 – 1800
  • Noise level: 6- 30 Decibels
  • RGB: Yes

Frequently Asked Questions(FAQ)

Q: Are 240mm AIO worth it?

A: Yes, they are! They cool your CPU and let you use your CPU to its fullest potential.

Q: What is the best air cooler(best AIO)?

A: It depends on your requirement. You can go to NZXT Kraken if you need something that offers value. Otherwise, you can check out the ASUS one.

Q: What is AIO cooler?

A: AIO cooler is a combination of many components to keep your CPU cool using liquid cooling. It can also be termed as a liquid CPU cooler. Typically, it consists of fans, fittings, tubes, water blocks, radiators, liquid, and radiators. You can also include RGB as well. 😉

Q: Is 240 mm cooler enough?

A: In most cases, a 240 mm cooling for CPU will do fine for high-end CPUs, which require a lot more cooling than mid or low-end CPUs. However, if you need the best possible cooling performance, you can check out 360 AUI mm coolers.


This is it. You’ve got some of the best 240mm AIO coolers to choose from, and that’s not it. To make sure you bought the right one without any hesitation, we collected all the bits and pieces to come up with a handy guide.

There are some amazing AIO coolers, like NZXT Kraken. However, our personal best is Corsair H100i because of its unmatched performance, flexibility with RGB lighting, and industry-leading pump rate.

About Our Reviews:- Pc-diagnostics.com is a team of consumer advocates committed to bringing you accurate, non-biased reviews on all tech products. We also analyze customer satisfaction insights from verified buyers. If you click on any link on pc-diagnostics.com & decide to buy it, we may earn a small commission.

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