Best AIO cooler in 2024

The best AIO coolers from MSI, NZXT, Corsair, and Cooler Master chill your CPU as well as a full water cooled gaming PC, without the hassle.

Four of the best AI coolers on a bright blue background

The best AIO cooler will stop your CPU from overheating during intense gaming sessions while keeping the inside of your PC looking spacious and clean. Custom water cooling might look even slicker, and air coolers can be cheaper, but a top AIO cooler is a great way to keep your CPU cool.

They’re an optional upgrade for most people, but AIO coolers can make the best gaming PC even better – particularly if you’ve learned how to overclock your CPU. A good AIO cooler lets you overclock to crank out more performance with less risk of melting your CPU to a crisp.

You might think liquids shouldn’t mix with electronics, yet an effective pump and radiator combo will move heat away from that CPU faster than you can say ‘thermal throttling’. We’ve put the best AIO coolers to the test, from top liquid CPU cooler brands like NZXT, CoolerMaster, MSI, and Corsair, so you’ve nothing to worry about when it comes to the safety of your rig.

Why you can trust our advice ✔ At PCGamesN, our experts spend hours testing hardware, games, and VPNs. We share honest, unbiased opinions to help you buy the best. Find out how we test.

MSI MEG CoreLiquid S360

Best AIO cooler

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MSI MEG CoreLiquid S360 specifications:
Size 360mm
Fans 3 x PWM 120mm
Compatibility U to AM4, LGA 1700, TR4
Reasons to buy
  • The best IPS screen
  • Supports the latest sockets
  • As quiet as a mouse
Reasons to avoid
  • Priced higher than most competitors

The MEG CoreLiquid S360 isn’t MSI’s first AIO cooler, but it’s certainly the best for three reasons: cooling, compatibility, and the extra considerations it makes. Not only does it balance impeccable performance with a low noise output even when the Silent Gale P12 fans spin at 2,000RPM, but it also supports Intel’s latest Alder Lake series of CPUs with an LGA1700 bracket right out of the box. It even packs a 60mm fan in the pump to make sure the motherboard’s VRMs remain cool – something that’s often overlooked by other AIO options.

MSI’s pièce de résistance is the built-in screen, which isn’t a new concept but none do it better than MSI’s MEG CoreLiquid S360. Alongside the usual images, GIFs, and system information others can display, this 2.4-inch IPS display does what most of its competitors can’t: play .mp4 files. You won’t need to tilt your head wherever you pop the radiator in your case, too, as the block twists 90 degrees so it’s always the right way up.

If money’s no object, no other AIO cooler hits all the same heights as the MSI MEG CoreLiquid S360.

NZXT Kraken X63

Best value AIO cooler

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NZXT Kraken X63 specifications:
Size 280mm
Fans 2 x PWM 140mm
Compatibility AM4, LGA 1151, LGA 2011-3
Reasons to buy
  • Great thermal performance
  • Affordable
  • Infinity mirror design
Reasons to avoid
  • Software can be fiddly

This 280mm liquid cooler from NZXT is our pick if you’re looking for a seriously good all-rounder. The virtually silent fans on the radiator have fluid-dynamic bearings, giving them a longer lifespan and quieter operation than any other fan technology. Naturally, there’s customizable RGB lighting on the pump cover so people know you’re not running any old stock solution.

With the X63 you’ll see idle and load temps in another league to air coolers. If you are overclocking, just make sure you’re picking up one of the best gaming motherboards to match.

Corsair H55 Liquid Cooler

Most compact AIO cooler

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Corsair H55 Liquid Cooler specifications:
Size 120mm
Fans 1 x PWM 120mm
Compatibility LGA 1200, LGA 115X, LGA 2066, AM4
Reasons to buy
  • Compact
  • Decent range of compatibility
Reasons to avoid
  • 120mm will always be more limited

Typically speaking, bigger is better when it comes to AIO coolers, but bigger aren’t always practical. A cooler can boast all the most impressive specs in the world, but it won’t make a difference if it doesn’t fit in your setup. The Corsair H55 Liquid Cooler is the best choice for anybody who needs a slightly more compact.

As a 120mm fan, it never stood the chance of being quite as powerful as any of its larger counterparts, but it still gives you all the benefits of liquid cooling. Despite its size, it still manages to inch itself ahead of the options on our list of the best CPU coolers. On top of that, it’s also quiet and one of the cheaper AIO coolers – there’s a lot to love about it.

iCUE H100i RGB Elite Liquid CPU Cooler

Quietest AIO cooler

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iCUE H100i RGB Elite Liquid CPU Cooler specifications:
Size 120mm
Fans 2 X FDB 120mm
Compatibility LGA 1700, LGA 1200, LGA 115X, LGA 2066, and AM4
Reasons to buy
  • Amazingly quiet
  • Impressive Software Suite
Reasons to avoid
  • Software Suite over 3GB
  • Only uses 120mm fans

Silence is golden, and if that’s the kind of gold you’re mining for, this is the AIO cooler for you. Of all the coolers we’ve seen over the years, none of them offers such quiet performance levels as this one. We know that that along will be the selling point for some readers, but on top of that it also has a brilliant Software Suite and some charming RGB lighting.

Though it takes up an annoying 3GB (which feels a bit too chunky to us), the amount of customization that it gives you makes it easy to forgive. You can adjust sound levels, set alerts, adjust RGB lighting, preset profiles, and more. If you like to be in complete control and make sure everything is running optimally, then this is the one to go for.

Although it has two 120mm fans and is by no means bad at cooling, but we understand that some readers are going to want to go for larger fan sizes. That aside, there’s little to dislike here.

Corsair H170i Elite XT 420mm RGB

Most powerful AIO cooler

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Corsair H170i Elite XT 420mm RGB specifications:
Size 420mm
Fans 3 X PWM 420mm
Compatibility LGA 1700, LGA 1200, LGA 1150, LGA 1151, LGA 1155, LGA 1156, LGA 1366, LGA 2011, LGA 2066, AM5, AM4, AM3, sTRX4, sTR4
Reasons to buy
  • Most powerful cooler we’ve ever seen
  • Impressive software suite
  • Detailed IPS display
Reasons to avoid
  • Expensive
  • Overkill for most people
  • Limited compatibility for 420mm

If you want the most powerful AIO cooler that money can buy, then this is the one for you. Keep in mind that this is more expensive because it’s so powerful, and for most readers, a weaker cooler will be fine, however, if you’re someone who wants to push their PC to the limit. This is the option for those who want to play the latest 4k games or render high-quality videos.

With a massive 420mm radiator, you’ll have a bit of a harder time fitting this into a lot of setups – but then, generally speaking, anyone who’s got a powerful, overclocked gaming PC that needs a AIO cooler like this, probably also has the space for it. We do recommend double-checking that you have a compatible case before ordering though.

So if you need it, and can afford it, it’s going to rock your socks off. If you’re someone who plays smaller (or older games) and doesn’t use their PC for anything more taxing, it’ll be hard to justify the expense.

CoolerMaster MasterLiquid ML240L V2 RGB

Best cheap AIO cooler.

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CoolerMaster MasterLiquid ML240L V2 RGB specifications:
Size 240mm
Fans 2 x PWM 240mm
Compatibility AM5, AM4, LGA1700, LGA1200
Reasons to buy
  • Reasonable price
  • Two big 240mm fans
  • Beautiful RGB lights
Reasons to avoid
  • Thermal performance could be better

We used to have the original CoolerMaster MasterLiquid ML240L model on this list, but times change, and so must we, and now the V2 has taken its place. What’s the difference compared to the original? Well, it has an upgraded pump, so it has improved flow, and it’s generally quieter too. Other than that, it’s pretty much the same.

This is a cost-effective AIO cooler that one that looks brilliant too. There are loads of RGB lights, which enable tons of customization options, and it’s pretty darn powerful too (more than any air cooler). At this price point, it’s a pretty admirable piece of kit.

Arctic Liquid Freezer II 360 ARGB

Best RGB AIO cooler

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Arctic Liquid Freezer II 360 ARGB specifications:
Size 360mm
Fans 3 x PWM 360mm
Compatibility LGA 1700, LGA 1200, LGA 115X, LGA 2011-3, LGA 2066, AM5, AM4
Reasons to buy
  • Beautiful RGB lights
  • Great performance from 360mm fans
  • Impressively quiet
Reasons to avoid
  • Too big for some setups

For our choice of the best RGB AIO cooler, we didn’t want to recommend something that just looks pretty. As much as we want our gaming space to look good, these are pieces of hardware that serve an important function  – the Arctic Liquid Freezer II 360 ARGB is one of the best coolers we’ve ever seen, and it looks fabulous too.

This 360mm radiator has three PWM fans that do an incredible job of keeping your CPU temperatures down, and it manages to achieve this while barely making a sound – even up to 290W. It’s compatible with quite a lot of devices too, so there are a lot of people for whom this could be the ideal cooler.

Of course, no matter how many devices this cooler is compatible with, it won’t make any difference to you if you’re dealing with a small form factor setup. As one of the bigger options on the list, it’s going to be a bit too chunky for some readers, especially as the radiator needs over two inches of clearance, but if you’ve got the room, this is a great choice.

What we look for in an AIO cooler

When looking for products to populate our AIO cooler list, we take into account a few different factors. Size is one of the main factors, but you’ll need to make sure that you know what space you have available in your case beforehand. A larger fan is better at regulating your air flow which is why you should maximize the space you can use for the cooler. Next up is how many fans it has. This can sometimes be determined by size, but most coolers utilize two or three fans and you always want more for better airflow control.

Something we also consider is how easy they are to install, and what additional features you’re getting above and beyond just the cooling. If we have two coolers that are identical, but one offers an onboard thermostat, we would choose this one provided that the price is fair.

Are AIO coolers better than air coolers?

Both AIO and air coolers have their advantages. For sustained workloads, AIO coolers are the best product for the job. This means if you’re expecting your PC to always be under some sort of strain, this is the option for you.

Air coolers are better at handling burst workloads, meaning that if you only expect to be pushing your CPU at irregular intervals, an air cooler can manage better during these peaks.

How long does a 360mm AIO cooler last?

If you get yourself a 360mm AIO cooler, you can expect it to last for a bare minimum of five years and that would be considered a relatively short life. Most likely, you’ll get a good ten years out of it.

Do AIOs lose water over time?

Yes, unfortunately so. This is a long and slow process though and the water is lost through permeation, rather than leakage, so you don’t need to worry about the loss of water harming your other components.

Do AIO coolers need maintenance?

Only minimal. They’ll attract dust over time which should be cleaned off, but an AIO is a sealed unit, so you don’t need to worry about internal maintenance.

For more ways to upgrade your gaming setup, you can check out the best wireless gaming headsets to ensure you’re getting the best audio possible. To round out the wireless revolution, you can also check out our list of the best wireless mechanical keyboards, so you’ll never be able to blame a misplay on your equipment again.