Best AIO Coolers in 2021

With newer, more powerful CPUs coming out every day, the need for a good cooling solution is increasing pretty much daily. And if DIY liquid cooling and custom loops are too much, something like the best AIO coolers is what you need.

AIO, or all-in-one coolers, take everything that’s complicated about a custom loop and put it together in one closed system. This basically eliminates any need for you to do anything else except mounting the system and enjoying the benefit.

The main thing about them, and why they’re better than air coolers, is cooling performance and noise levels. The liquid cools much better than air, especially when it’s in an optimized system like this. To add to this, a good AIO cooler needs to move much less air than an air cooler. This allows it to run the fans at lower RPM and get lower noise levels. But let’s not waste any more time and look at our options, shall we?

Top 3

How to Choose the Best AIO Coolers

When you’re looking at the options below, there are a few things you’ll want to take note of, so let’s see what they are.

The first one is the radiator size. The radiator size indicates how many fans you have, and how big they are. For example, you can have a small radiator with a single 120mm fan. Or, you can have a massive one with three 140mm fans. This all depends on two things. The first one is what’s the biggest size your case can fit. If it fits two 140mm fans next to each other, that’s room for a 280mm radiator right there. But you’ll find this in your case manual. The second one is what kind of CPU you’re cooling. If you have a powerful CPU with a high TDP, a larger radiator provides better cooling.

The other thing you want to note is basically all the extras. The radiator size dictates performance. However, you could have nice things like RGB, braided hoses, or even something like NZXT’s pump display which is a neat addition. You can also consider the fans that are included here because some AIOs will come with outright bad fans. With an AIO, you want fans optimized for static pressure. This lets them move larger amounts of air, even if that’s at a lower RPM.

With that out of the way, let’s take a look at picking the best AIO coolers for your needs and requirements.

360mm AIO Coolers


Best Premium Pick

NZXT Kraken Z73 360mm - RL-KRZ73-01 - AIO RGB CPU Liquid Cooler -...
  • CUSTOMIZE YOUR BATTLESTATION: With a bright, 2.36” LCD screen capable of displaying 24-bit color, you can now completely customize the look of your...
  • STAY IN CONTROL: CAM’s elegant, user-friendly software makes you the master of your PC with simple-to-use, intuitive controls, you can manage your...
  • INCREDIBLE PERFORMANCE: Featuring a chamfered intake and fluid dynamic bearings, they deliver silent operation, long-term reliability, and powerful...

NZXT has long had some of the best premium AIO coolers, but the Z73 takes things to the next level. The three 120mm Aer P fans do a great job at keeping things cool, and the massive radiator can cool liquid very quickly.

The braided tubing adds rigidity and durability, and you have plenty of length. You can put it both at the front, or the top of your build, regardless of the case.

But arguably the highlight here is the display on top of the pump. It’s CAM-compatible, and it can display things like temperatures or performance. Or, you can just have it display a random GIF or animation. That’s completely up to you. And overall, the combination of performance and aesthetics makes this one of the best AIO coolers.

Cooler Master MasterLiquid ML360R

Best Midrange Pick

Cooler Master MasterLiquid ML360R ARGB Close-Loop AIO CPU Liquid Cooler,...
  • Exclusive tech cooler master controls quality and builds on decades of innovation with 100 percent in house design and manufacturing
  • Dual dissipation our low profile dual chamber pump enhances performance and durability over our last gen single chamber pump designs; Sizable...
  • 360 millimeters radiator our aluminum 360 millimeters large surface radiator will remove excess heat from the CPU and cool with maximum efficiency

Cooler Master’s cooling products have always offered a great combination of price and performance, and the ML360R is no exception. This 360mm AIO performs admirably without costing an arm and a leg and comes with a few nice things.

The fans are all optimized for static pressure, and they push a lot of air. They’re also ARGB, and so is the circle in the pump, so you can customize the looks, too. There is also a controller included, so you can adjust it even if you don’t have a supported header.

To add to this, the dual-chamber pump does a great job at keeping your CPU cool. The FEP tubes are covered with black sleeves to improve durability, which is something we’re used to seeing only on high-end coolers. A great midrange pick if you want RGB and good performance.


Best Budget Pick

DeepCool Castle 360EX Liquid Cooler 360mm Dual-Chamber Pump 2550RPM Aura...
  • DeepCool CASTLE 360EX AIO cooler water pump carries three-phase motor up to 2550RPM provides higher cooling performance with an increased flow rate...
  • CASTLE 360EX CPU liquid cooler combines upgraded water pump with high-density radiator and triple fans to provide mighty 300w TDP heat dissipation,...
  • CASTLE EX Series liquid coolers equipped with DeepCool’ s Anti-Leak patent technology, the pressure-relief device in the top of radiator vents inner...

If you don’t want to spend too much, DEEPCOOL’s Castle 360EX is the perfect budget 360mm AIO. It won’t set you back too much, and it still comes with all the nice things you’d need from one of the best AIO coolers.

The AIO comes with anti-leak tech. There are also braided tubes that are a rarity on a cooler that costs as much as this one. It’s obvious DEEPCOOL played the durability game and did a great job. The large copper base on the pump and the increase in skived fins on the backside make for a large heat absorption area, and overall, the cooler does a great job with pretty much any CPU.

Factor in the RGB on the pump itself, which you can control with most popular motherboard software options, and you’re looking at an excellent choice for a budget AIO.

240mm/280mm AIO Coolers

Corsair H115i RGB Platinum

Best Premium Pick

Corsair H115i RGB Platinum AIO Liquid CPU Cooler,280mm,Dual ML140 PRO RGB...
  • 2 140mm ML PRO Series RGB magnetic levitation PWM fans deliver a blast of color and improved airflow for extreme CPU cooling performance. The fan...
  • 16 Individually controlled RGB LEDs light up the pump head to produce stunning customizable lighting effects to match your build Fan Speed is 2000 RPM
  • CORSAIR iCUE software allows you to control your cooler’s RGB lighting monitor CPU and coolant temperatures and adjust fan and pump speeds all from...

Corsair has been around and part of the AIO game for a while. The H115i RGB Platinum is a great choice for people who want the best, but can’t fit anything over a 280mm radiator in their case. It takes two of Corsair’s ML Pro magnetic levitation fans and adds a thermally optimized, near-silent pump for the best possible performance.

In addition to this, you’re looking at sleeved tubes for durability. Also, RGB on both the fans and the pump itself, so you can customize the looks of the entire system as you see fit. You can control it with the iCUE software, which is simple enough.

Now, the H115i Platinum is definitely expensive. But it is certainly one of the best AIO coolers of this size if you can fit it in your case.

NZXT Kraken X53

Best Midrange Pick

NZXT Kraken X53 240mm - RL-KRX53-01 - AIO RGB CPU Liquid Cooler - Rotating...
  • Design: With a re-designed cap and larger infinity mirror ring LED, the new Kraken X allows for adjusting the orientation of the pump head to fit...
  • Bigger And Brighter: 10% bigger infinitty mirror cap allows for more vivid RGB and a rotating cap accommodates re-orienting the logo no matter the...
  • Better Control: Full CAM integration allows you to manage your Kraken’s performance with precision

If you don’t want the fancy display of the Z series AIOs, the X53 is a pretty great alternative. Oh, and it will also save you a few bucks. It comes with their well-known high-performance pump and two 120mm Aer P fans. The combination results in some pretty great temperatures on any processor.

The braided tubes are a nice addition, and you also get RGB LED on the infinity mirror pump cap. A nice addition is the ability to rotate the pump head. This means you can set the pump in any orientation and still have the logo oriented upright.

The tip of the iceberg is the complete integration with NZXT CAM. This gives you total control over temperature, pump speeds, fan RPM, and everything else. Overall, if you want a 240mm AIO, this is probably the best price-to-performance model.

EVGA CLC 240mm

Best Budget Pick

EVGA CLC 240mm, All-In-1 RGB LED CPU Liquid Cooler, 2x FX12 120mm PWM Fans,...
  • Compatible with Intel LGA2066 2011 2011-v3 1200 1150 1151 1155 1156 1366 and AMD AM2 AM3 AM4 FM1 FM2 TR4
  • 240mm Dual Fan radiator
  • RGB LED's, can be synced to other EVGA RGB components

We never thought we’d be recommending EVGA as a budget-oriented brand, but the CLC 240mm is one of their AIOs that gets you excellent performance at a price that’s more than reasonable. You get two FX12 120mm fans, which perform admirably and come with PWM to regulate speeds, as well as a near-silent pump.

The fans themselves are made to reduce the noise without sacrificing performance. This means you can run them at lower RPM and still get great performance compared to other AIOs. This is nice, and with the airflow you get, you will get an almost-quiet AIO and rather low temperatures. The pump also has an RGB logo that you can customize, which is a nice touch.

The one thing we didn’t love was the tubes. While braided, they were a bit too thin. Honestly, this isn’t really confidence-inspiring in terms of how much coolant they can move. But they did do a good job.

120mm/140mm AIO coolers

Corsair H80i v2

Best Premium Pick

Corsair Hydro Series H80i v2 AIO Liquid CPU Cooler, 120mm Thick Radiator,...
  • Extra-thick 120mm radiator: a depth of 49mm provides more surface are for rapid cooling
  • Improved cold plate and pump design: better efficiency gives you lower temperatures with less noise. Sound Blaster X-FI MB5+ALC 1220 1200b SNR HD...
  • Advanced SP120L PWM fan design: better high-static pressure air delivery and customizable speed

It’s easy to see why this is our pick for a premium choice – it’s built like a tank, and it performs very, very well, for an actually reasonable price. It also does something few others do – it comes with two fans that go on both sides of the radiator, in order to get you even better performance.

And oh boy, is that performance great. Temperatures are as low as they could be, and with Corsair including two SP120L fans, you get quiet operation as well. Of course, you’ll need q bit of room to fit it, but if you have that extra room, it’s more than worth it.  

Factor in the massive pump surface, as well as the braided tubes and extra-thick radiator, and it’s easy to see why this is one of the best AIO coolers.

NZXT Kraken M22

Best Midrange Pick

NZXT Kraken M22 120mm - RL-KRM22-01 - AIO RGB CPU Liquid Cooler -...
  • Advanced Lighting Modes: With an infinity mirror Design, add amazing color and lighting to your CPU cooler for a fully dynamic lighting experience
  • Engineered For Performance: Engineered to achieve superior cooling while keeping noise levels to a minimum. System Requirements-CAM software requires...
  • Master Your Control: Using CAM, manage the performance with precision and make changes quickly, using the desktop or mobile app. You can even monitor...

The Kraken M22 is NZXT’s “small kid” in the lineup. It comes with a single Aer P 120mm fan and a compact radiator, but it’s still an excellent choice. At a reasonable price, you get great cooling and NZXT’s infinity mirror design on the pump.

The main idea behind the design of the M22 was to create a design that’s as compact as possible, which is why you only have a 120mm Aer P fan, and a radiator that’s incredibly compact. The pump itself is small, too, which is nice. You get enough of a length with the tubes, and you also get the ability to rotate the pump as you see fit, while still keeping the logo upright.  

All things considered, if you want excellent performance and a bit of nice-to-have aesthetics, this is a great choice.

Cooler Master MasterLiquid ML120L

Best Budget Pick

CoolerMaster MasterLiquid ML120L RGB V2, Close-Loop AIO CPU Liquid Cooler,...
  • 3rd Generation Dual Chamber Pump for overall cooling efficiency and performance .CPU Socket : Intel...
  • New SickleFlow Refreshed exterior design for improved lighting and fan blades for a quiet airflow performance
  • RGB Lighting Signature cooling performance with an RGB design for all of the users wanting lighting effects that are fully customizable

Another MasterLiquid AIO, but this time as a budget pick, it seems like Cooler Master really knows what they’re doing. The ML120L takes one of Cooler Master’s SickleFlow fans and adds a high-performance pump to provide excellent cooling at a rather reasonable price.

RGB makes an appearance on both the fan, as well as the logo on the pump, so you have a bit of customization. And even if you don’t have a header on the motherboard, you get an included controller. The sleeved tubes are really well made, and Cooler Master boasts EPDM material on the inside to strengthen the seal and get you improved longevity.

All things considered, if you don’t want to spend too much, but still want a bit of customization and don’t want to compromise performance, this is one of the best AIO coolers out there.

Honorable Mention

Corsair HX305i Hardline Kit

Corsair Hydro X Series XH305i Hardline Water Cooling Kit with/incl XC7 CPU...
  • Make your PC a visual masterpiece with a complete Hydro X Series RGB hardline custom cooling kit, giving your system a stunning, distinctive look with...
  • Easy and intuitive installation and setup, with the option for automated software control to set your fan and pump speeds to their lowest possible...
  • Dynamic, individually addressable RGB lighting integrated into the XC7 RGB CPU water block, XD5 RGB pump or reservoir, and QL120 RGB cooling fans...

One of the main things about people who steer clear of custom cooling loops is the complications of getting everything together. If you’d still want to play around a bit, you can go for Corsair’s Hydro X series XH305i kit, which gets you all the components you need for guaranteed compatibility. All that’s left for you to do is put everything together.

The kit includes pretty much everything you might need. You get a pump, radiator, tubing, tools to bend and cut the tubes, coolant, and fittings. What’s also nice is that you also get three QL120 RGB fans, as well as the Commander Pro RGB controller, and a fan speed controller, too. The XR5 radiator does a great job, and so does the XD5 pump and reservoir combo which is made to save you a bit of space. Last but not least, the XC7 RGB water block gets you a nickel-plated copper construction that you won’t find with many AIOs.

Now, there’s no denying that it will be complicated to put together. You’ll have to be careful, and you’ll have to know what you’re doing. But if you’re down to play around a bit, and figure a few things out on your own, you’re going to have a lot of fun with the HX305i hardline kit.

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