Best CPU cooler in 2024 – air and AIO cooling tested

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You’ll want the best CPU cooler by your side when the heart of your gaming PC starts heating up. Much like the human body, the more you push your processor, the more it works up a sweat. Let it get too toasty, and you could see your PC shut down, or you might even shorten its lifespan. A good CPU cooler keeps those temperatures at bay and stops it from overheating. Not just any old blower will do the trick. To choose the right one for the job, you first need to know air cooling from your AIO liquid cooling.

Air coolers do what they say on the tin. Using a metal heatsink, they sap the warmth away from the best CPU, then cool it with air using connected fans. On the plus side, air coolers are the most affordable solution, and they’re great for mid-range CPUs. Unfortunately, they struggle with the temperatures of higher-end models like Intel Core i9 or AMD Ryzen Threadripper.

Liquid coolers use fluid to transfer the heat from your CPU. It travels from a water block through tubes to the connected radiator, where fans handle cooling. This method used to be reserved for DIY enthusiasts building fully watercooled rigs. The rise in AIO (all-in-one) solutions has made it far more accessible. It’s ideal for overclocking and high-end CPUs, but you’ll pay a little more for the pleasure.

Once you know which type you want, it’s especially important to consider space. Most air coolers are bulky, and you’ll need to be mindful of their height. AIO coolers are significantly shorter and instead have a bulky radiator that’s best placed at the front or top. You’ll need to note your PC case dimensions or whip out the tape measure to be sure. Don’t worry about whether you prefer Intel or AMD. Our tried and tested CPU coolers have brackets for all kinds of sockets.

At a glance

1. MSI MAG CoreLiquid E360 – best CPU cooler
2. be quiet! Dark Rock Elite – best quiet air cooler
3. Noctua NH-D12L – best space-saving air cooler
4. DeepCool LT720 WH – best looking AIO cooler
5. be quiet! Pure Loop 2 – best 280mm AIO cooler
6. Arctic Liquid Freezer III 420 ARGB – best 420mm AIO cooler

Best coolers for CPUs

1. MSI MAG CoreLiquid E360

The best CPU cooler.

Our top cooler was always going to be an AIO, given liquid cooling offers unrivalled performance. If you’ve ever splashed your face with water to cool yourself down, you know how effective it can be. The MSI MAG CoreLiquid E360 stands out above the rest, with the best temperatures and performance in most of our tests, especially at a higher TDP.

Using the Intel Core i9-13900K at 153W, the MAG CoreLiquid E360 consistently managed to stay cooler with the fans spinning at a lower rpm. There are a few AIO CPU coolers out there with a higher max rpm that lop a degree or two off, but we prefer our gaming PC stealthy rather than sounding like a helicopter. It even managed to keep a cool enough head at 253W, below the 90°C mark.

It’s not all function, though, as it also looks the part. Coming in both black and white, it features a sleek RGB-driven faceplate. Take a peek at an angle, and it looks a little like a glowing crescent moon, and we’re big fans. Speaking of which, the blowers include white blades to better reflect the lighting, transforming the radiator from a slab of metal into something a bit more fetching.

Even the price point is pretty slim for a cooler of this capacity, sitting at £94.99 for the dual-fan E240 and £119.99 for the triple-fan E360. It’s a shame there’s no E280 so you can use 140mm fans, but it doesn’t get much better than this.

Read our full MSI MAG CoreLiquid E360 review here.

2. be quiet! Dark Rock Elite

The best quiet air cooler.

Specs
Fans	Two 135mm
Fan speed	Up to 2,000rpm
Noise	Up to 41.8dBA
Size (W x H)	136mm x 168mm
Sockets supported	Intel: LGA 1700/1200/1150/1151/1155 AMD: AM4/AM5/TR4/sTRx4
MSRP	From £109.99

be quiet! Dark Rock Elite lives by its name, keeping acoustics hush. Single-tower options are usually more muted, but two premium 135mm Silent Wings PWM fans are better than one. It’s the quietest dual-tower we’ve tested with a Core i9-13900K, which is no small feat. All the best air coolers struggle with Intel’s beast.

When the gaming gets tough, performance mode is on-hand to crank the fans up to their maximum 2,000rpm. Toggling quiet mode resets them back to 1,500rpm, all without having to head into BIOS. It’s a luxury-level of control that means you can scale depending on the balance you want. It’s a little shy of Noctua’s most performant CPU coolers, running 2.4% hotter, but it’s up to 14.9% quieter. That’s a trade-off we’re personally willing to make.

Dual-tower air coolers have a nasty habit of looking a bit unwieldy with their bulk. Dark Rock Elite sidesteps this with an attractive RGB-covered black mesh shroud. It still sits pretty close to the tempered glass panel on your PC case with a 168mm height, but it doesn’t dominate. It’s one you’ll be proud to showcase on your desk.

The high-end air cooler isn’t cheap, costing you triple figures. You get what you pay for, however, which is a hassle-free setup, sleek look, and whisper-quiet performance. It’s the ideal air cooler for anything other than the most demanding processors.

Read our full be quiet! Dark Rock Elite review.

3. Noctua NH-D12L

The best space-saving air cooler.

Specs
Fans	Up to one 120mm
Fan speed	Up to 2,000rpm
Noise	Up to 38.1dBA
Size (W x H)	125mm x 145mm
Sockets supported	Intel: LGA 1851/1700/1200/1156/1155/1151/1150 AMD: AM4/AM5
MSRP	From £80

Noctua NH-D12L is a short stack that offers the best of both worlds. It’s not as tall as an ordinary dual-tower at 145mm, but doesn’t come with low-profile performance sacrifices either. It’s the perfect companion for the growing number of Mini- and Micro-ATX PC cases out there, keeping HTPCs cool.

Equipped with a single NF-A12x25r fan, the Noctua NH-D12L is one of the quietest solutions we’ve tested. It manages to keep in the same ballpark as the Corsair iCUE H115i Elite Capellix when running an AMD Ryzen 9 5950X. Of course, it doesn’t quite hit the same temperatures as an AIO, but at 3.2% hotter at 600rpm and 13.7% at 2,000rpm is a pretty slim difference considering its form factor. You can add a second NF-A12x25r to drop temperatures a further 6°C, narrowing the gap, but this is sold separately and increases both height and noise.

We’ve been waiting over a year for a chromax.black edition of the cooler. For better or worse, you’re stuck with the brown-and-beige paint job for the time being. At the very least, the signature colour scheme signifies quality, even if it doesn’t go with the RGB that’s likely in your rig. Give it some consideration, though. After all, the fan is on display at all times near the centre of your gaming PC.

While we initially wished for it to be a little cheaper, the fan alone is worth 31% of the entire package. With that in mind, it packs pretty good value. Just be careful of it hanging over your RAM slots on LGA 2066 motherboards, as it’s small… but not that small.

Read our full Noctua NH-D12L review.

4. DeepCool LT720

The best-looking CPU cooler.

Specs
Fans	Up to three 120mm
Fan speed	Up to 2,250rpm
Noise	Up to 53.3dBA
Radiator size (radiator L x W x H)	402mm x 120mm x 27mm
Sockets supported	Intel: LGA 1150/1151/1155/1156/1200/1700/2011/2011-v3/2066 AMD: AM4/AM5/sTR4/sTRx4
MSRP	From £110

DeepCool LT720 is a prime example of not always being a choice between form or function. You can have both, and shouldn’t let anyone tell you otherwise. It’s also a testament that less is more in the ARGB department, sticking with block-coloured fans and relegating any glowing bits to the CPU block.

You have a choice between black or white. We’re partial to the bleached model, given its clean look and the contrast of black and white in the waterblock. The original model stands out itself, though, with a grey block instead. Ultimately, this will depend on your gaming PC setup, but it’s nice to have a choice.

LT720 is the third-best CPU cooler we’ve tested in Cinebench, using a Core i9-13900K at 253W. There’s a bit of a trade-off with noise when the fans are full pelt at 2,300rpm, but DeepCool’s blades also spin quicker than any others on this list. Clocking in at a more reasonable 1,200rpm, it’s around 4dB quieter than our MSI top pick.

Overall, it’s one of the most compatible CPU coolers we’ve tried. It features brackets for most Intel processors over the past 15 years. AMD support is a bit spottier, focusing on AM4 onwards, so your mileage may vary. Still, for the price you pay, it’s a jack-of-all-trades that looks the part in any system.

Read our full DeepCool LT720 WH AIO review here.

5. be quiet! Pure Loop 2

The best 280mm AIO cooler.

Specs
Fans	Up to three 120mm
Fan speed	Up to 1,800rpm
Noise	Up to 46dBA
Size (radiator)	277mm x 120mm x 27mm (52mm incl. fans)
Sockets supported	Intel: LGA 1150/1151/1155/1200/1700/2011-v3/2066 AMD: AM4/AM5
MSRP	From £84.99

Credit where it’s due, be quiet! caters to a wide market. Not only does Pure Loop 2 start with a 120mm option despite dinky devices falling out of favour, but there’s also a fantastic 280mm model for larger fans. Sure, there are 240mm and 360mm choices too, but they’re a dime a dozen.

The biggest benefit of a 280mm model is that you can slip 140mm fans in. You don’t need as many of them to push the same amount of air, and they can spin slower. In our how to make a PC quieter guide, we describe them as essential if your goal is a silent system.

As its second generation of mid-range CPU coolers, Pure Loop 2 swaps white LEDs for ARGB, makes the pump PWM adjustable, and upgrades fans to the latest high-speed Pure Wings 3. There’s also a Pure Loop 2 FX model with Light Wings fans instead, if you want something a bit brighter.

You won’t notice much of a perceptible difference in performance between most AIO coolers on this list. You will hear a difference, however, which is where the Pure Loop 2 excels. Combine silence with a small starting price and be quiet! has gotten CPU coolers down to a fine art.

Read our full be quiet! Pure Loop 2 review.

6. Arctic Liquid Freezer III 420 ARGB

The best 420mm AIO cooler.

Not many PC cases can squeeze in a chonky 420mm radiator. If yours can, then I can’t recommend Arctic Liquid Freezer III enough. It features a wonderfully revamped design for the third generation that’ll look at home in any build. There’s quite literally something for everyone here. You have the choice between black or white with ARGB or plain black with no lighting at all and across a range of sizes.

The 420mm model is our highlight. No other cooler has stood up to the power-hungry Intel Core i9-13900K like Liquid Freezer III 420, keeping the processor steadily under 80ºC while running at a full 253W. This is mainly thanks to three 140mm fans, although the industry-leading MX-6 thermal paste surely helps.

Liquid Freezer III remains one of the quieter models we’ve tested despite featuring so many chonky fans. It’s whisper-quiet when spinning slowly, rivalling that of air coolers. Ramping it up to full speed even gives be quiet! a run for its money.

There’s quite simply a lot to love here. You don’t need extra software for the RGB. It has unrivalled temperatures for high-end CPUs. And the best part is that Arctic launched it at a discount.

Read our full Arctic Liquid Freezer III 420 ARGB review.

CPU cooler FAQ

Which CPU cooling is best?

Liquid coolers are the best devices to keep a CPU chilled. This can be an open loop, like custom watercooled systems, or a closed loop, such as AIO coolers. Air coolers do a good job at moving the heat away from the processor, but liquid can simply move more quickly. Besides, air cooling comes with the risk of raising the ambient temperature of the PC, which isn’t too bad for general gaming but becomes problematic when cranking the settings up.

Is there a risk that an AIO cooler will leak?

No technology is perfect. There’s an inherent risk, albeit tiny, that closed-loop systems might spring a leak. Just as a car tyre might suffer a puncture, the risk of an AIO cooler stems from its very design – a symphony of pumps, tubes, and liquids working in harmony to siphon away the heat. This is why it’s important for you to buy from manufacturers that put their coolers through rigorous quality assurance testing. We’ll only recommend devices that are reliable and are bolstered with a warranty, just in case.

If you do come across a leak, take swift action:

1. Power down the system – pull the emergency brakes and shut your PC down fully without hesitation.
2. Disconnect the power supply – remove the kettle lead from the back of the PC. This is crucial to avoid short-circuiting.
3. Find the leak – spot where the drip is so you can patch it. This stops you from further damaging the system when removing it.
4. Carefully remove the AIO – ground yourself and pull the AIO from your PC.
5. Inspect the damage – don your detective hat and investigate to see if any component is wet.
6. Dry your system thoroughly – gently dry your components with a lint-free cloth and leave them a couple of days just in case.
7. Test components individually – once dry, test each component separately where possible. Start with the motherboard, then try with the CPU, RAM, then graphics card.
8. Contact the manufacturer – reach out to the brand’s support, present your claim, and use your device’s warranty.

Is an AIO quieter than air cooling?

AIO coolers are generally quieter than air coolers at idle speeds. Liquid stays cooler for longer, and the fans on the radiator shouldn’t start spinning until things start heating up. AIO coolers can be louder than air coolers when gaming, however, as the radiators often pack more fans, and there’s the sound of the pump. Ultimately, it depends on the rpm of the fan and how far you crank those fan curves.