The 7 Best CPU Coolers for i9 9900k in 2021

It is undeniable that the i9 9900k is a powerful processor capable of delivering the best performance for your system. With this processor, you can efficiently run the latest video games and high-end graphics or rendering software.

The i9 9900K is an excellent processor if you desire to work from morning to night without experiencing any performance issues. Nevertheless, you need to ensure that your PC doesn’t overheat during these long hours of use. The best way to prevent this from happening is to install a CPU cooler.

You may wonder, why is a CPU cooler essential? When your computer is used for extended periods, it is subject to extreme load, which can cause it to shut down due to thermal throttling caused by the heat.

The extreme heat can also damage high-end computer components. Getting a suitable CPU cooler is vital to protecting your I9 9900K and your GPU and Motherboard, which are expensive components, and you don’t want to lose them by minor negligence.

How We Selected These Products:

When it came to finding the best i9 9900k cooler, we did a deep dive into all available options.

Our parameters were simple: performance and value for money. We looked at every possible option out there. We rated them on our criteria like thermal performance, cooling capability, and noise level before narrowing it down to those few who deserved consideration as potential winners.

We went through dozens of different models to figure out what is worth buying vs. not worth wasting time with when shopping around – as there are many options to choose from!

We found that Air and AIO are both excellent options to choose from when purchasing your next cooling solution.

And to make things easier for you, we included options from both kinds to assess to make things easier while selecting the best CPU Cooler for i9 9900K.

7 Best CPU Coolers For i9 9900K

  1. Noctua NH-D15 – Best Overall Cooler for i9 9900K
  2. DeepCool Assassin III – Best Noctua NH-D15 Alternative for i9 9900K
  3. Be Quiet! Dark Rock Pro 4 – Best Performance Cooler for i9 9900K
  4. Corsair iCUE H150i – Best RGB Cooler for i9 9900K
  5. NZXT Kraken Z73 – Best AIO Cooler for i9 9900K
  6. Scythe Fuma 2 – Best Quietest Cooler for i9 9900K
  7. Noctua NH-C14 – Best Low Profile Cooler for i9 9900K

1. Noctua NH-D15 – Best OveralL


Dimensions:5.91 x 6.34 x 6.5 inches
Material:Copper and Aluminium
Fan Speed:1500 RPM
Noise Level:24.6 dB
Warranty:6 years
Source: Amazon
Best CPU Cooler for i9 9900k

Noctua is a company that has been in the cooling game for decades. With their products, they have spent years setting themselves apart from competitors and proving to be reliable time after time again with excellent results.

The Noctua NH-D15 is a high-end CPU cooler that promises to be one of the most capable coolers on today’s market. It comes with an advanced thermal design to provide optimal performance for overclocking enthusiasts, professionals, and gamers alike.

This Air Cooler from Noctua is a powerhouse of cooling technology. With two massive aluminum heatsink towers, six copper heat pipes, and an all-new design to the fan blades, it dominates performance from every angle. It’s perfect for gaming enthusiasts looking to get more out of their i9 9900K!

The NH-D15 is the ultimate dual tower cooler for overclockers and silent enthusiasts. The copper base plate provides excellent thermal conductivity, resulting in better performance than most air cooling fans on the market today!

  • Exceptional cooling performance and runs silently
  • High-quality construction
  • All-in-one package
  • Clearance for RAM is good
  • Features two 140mm fans as standard
  • Mounting system that is user-friendly
  • Many people don’t like browns and beige color
  • Pricey

2. DeepCool Assassin III – Best Noctua NH-D15 Alternative


Dimensions:6.34 x 5.51 x 6.5 inches
Fan Speed:400-1400 RPM
Noise Level:34.2 dB
Warranty:5 years
Source: Amazon
Noctua alternative CPU Cooler for i9 9900k

The Assassin III is a thermal solution for high-end CPUs. It remains one of the most popular cooling systems on the market because it provides excellent performance, efficiency, and noise levels while maintaining an elegant design that doesn’t take up much space.

The Assassin III is not your average air cooler. Seven heat pipes, each nickel-plated and running the entire height of both cooling towers, promise a lot of cooling power to ensure your system can stay cool no matter what happens inside it.

This CPU cooler uses a torsion plate that is fixed to the top of the cooling base. This prevents misalignment, and it’s also permanently attached so that installation won’t be complicated at all!

The Assassin III works efficiently to cool off all components inside your computer without slowing down performance or causing noise pollution like traditional fans do when they are at full speed.

  • Exceptional thermal performance
  • Installation is straightforward
  • Attractive design with minimal lighting
  • Looks appealing
  • Top end built quality
  • Compared to competitors, a little bit louder
  • Expensive for an air cooler

3. Be Quiet! Dark Rock Pro 4 – Best Performance Cooler


Dimensions:5.35 x 5.74 x 6.40 inches
Fan Speed:1400 RPM
Noise Level:24.3 dB
Warranty:3 years
Source: Amazon
Performance CPU Coolers for i9 9900k

The Dark Rock Pro 4 CPU cooler by Be Quiet! is an effective way to keep your precious i9 9900K cool. The company has been around since the early 90s and has a lot of experience in designing cooling solutions for electronics, so they know what they’re doing.

As for build quality, it’s hard to find a cooler that measures up against Be Quiet; their products meet or exceed those from other top brands such as Noctua, Corsair, and Cooler Master, which means you can be sure your rig will stay cool even at extreme usage.

The exterior of the cooling tower has been covered in black ceramic paint, which is designed to protect it from heat. The base holds a series of seven pipes, each 6mm in diameter and made out of copper with an exciting design on top that looks like scales.

Dark Rock Pro 4 fans are engineered to provide efficient cooling without sacrificing the performance or noise caused by traditional fan systems. The innovative design of these high-speed, low-noise fans creates a perfect balance between silence and power that is unmatched by many other products on the market.

  • High-quality construction
  • Enhanced mounting mechanism
  • Quiet nature
  • Compatible with most CPU sockets
  • Top-of-the-line performance
  • Attractive design
  • Expensive side
  • Bulky
  • May not fit in small cases

4. Corsair iCUE H150i RGB Pro – Best RGB Cooler


Dimensions:11.5 x 4.92 x 4.72 inches
Fan Speed:2100 RPM
Noise Level:37dB
Warranty:6 years
Source: Amazon
RGB CPU Coolers for i9 9900k

It’s important to know what you’re looking for in a CPU cooler before buying one for your i9 9900K. If you only want the best performance, then the Corsair H150i is not for you. But if you’re looking for something with great aesthetics and enough cooling power, then this might be the perfect fit!

The iCUE H150i has an advanced RGB LED system that allows users to customize colors on their computers and change them to match their mood or personal style. And don’t worry about sound- this fan whispers quietly while still providing excellent airflow!

The iCUE software is an excellent tool for all PC enthusiasts. It allows you to fine-tune your cooler with ease and gives an array of options to cater to each user’s needs.

There is the Quiet mode for a gentle noise level. Balanced mode: This provides an ideal balance between cooling and noise levels. Extreme mode: Where performance matters more than anything else, including electricity usage. And Zero RPM: this will be your best option if you are looking for silence.

  • Even at maximum speed, low noise levels
  • Good build quality and top-tier performance
  • Excellent clearance
  • Fans that levitate using magnets
  • LINK software enables enhanced configuration and monitoring
  • Aesthetics
  • RGB LEDs
  • Expensive
  • Three 120mm adjacent fan mounts are needed for a 360 radiator

5. NZXT Kraken Z73 – Best All In One (AIO) cooler


Dimensions:1.88 x 7.1 x 5.8 inches
Material:Copper and Aluminium
Fan Speed:500-2,000RPM
Noise Level:21 dB
Warranty:6 years
Source: Amazon
AIO CPU Coolers for i9 9900k

The NZXT Kraken Z73 cpu cooler is a powerful all-in-one liquid cooling solution that can be a perfect fit for your i9 9900K processor.  It’s easy to install and compatible with most motherboards, so it’s perfect for anyone who wants to keep their system running cool and stable.

The NZXT Kraken Z73 boasts an all-copper design that offers both excellent thermal conductivity and ease of installation due to its low profile pump head design. It’s a good mix of performance and cooling prowess with solid build quality.

The NZXT Computer aided manufacturing (CAM) Software allows users access to an interface where they can set both their display preferences as well as speed settings on fans, pumps etc.

These options can be managed in one place through a curve ramp or by using manufacturer-defined performance levels which allow ample customization for any situation at hand.

The design of this product is both flashy yet sophisticated at the same time so you can make a statement. As well as real-time system control, UI integration, and hardcore CPU liquid cooling, this cooler definitely offers something to look forward to. 

  • A multi-option LCD display that is beautiful
  • Very useful CAM software
  • Simple to install
  • Cooling capacity is excellent
  • An ideal AIO cooler for beginners
  • Noticed fan noise at 100% RPM
  • Liquid cooler: comes at higher price

6. Scythe Fuma 2 – Best Budget cooleR


Dimensions:5.15 x 6.83 x 5.39 inches
Fan Speed:300 – 1200 RPM
Noise Level:1 dB
Warranty:6 years
Source: Amazon
Budget CPU Coolers for i9 9900k

Scythe has been providing excellent quality products for over 25 years to help you get more out of your machines by keeping them running as they should – cooler than ever before with their efficient and high-quality equipment.

This Scythe CPU cooler is not your average boring, run-of-the mill design. It is full of high-end features, like six heat pipes and a flat base that was machined to really fine tolerances. The best thing about this design? There’s no cheap direct contact between the fan blades and those pesky heat pipes!

We have all been there, you are minding your own business when suddenly the sound of a loud fan becomes intrusive. Well this is not an issue with Scythe Fuma 2 cpu cooler as it claims to be silent and has compatibility for most major motherboards on the market!

This CPU cooler’s dual tower design is a perfect blend of aesthetics and ease for most sockets.  If you’re looking to save money, but still want something that can cool your processor like the big dogs without breaking the bank this may be right up your alley!

  • Fantastic performance and extremely quiet
  • The height is just 155mm
  • Top rated Build quality and Easy installation
  • No issues with clearance (RAM)
  • High-quality air cooler at an affordable price
  • Performance needs to be improved

7. Noctua NH-C14 – Best Low Profile CPU Cooler


Dimensions:4.53 x 5.51 x 6.42 inches
Fan Speed:300 to 1500 rpm
Noise Level:24.6 dB
Warranty:6 years
Source: Amazon
Low profile CPU Coolers for i9 9900k

Noctua is a company that believes in quality. The NH-C14S cpu cooler has been built to be bulletproof and able to withstand the rigors of overclocking despite being smaller in size, so you can rest easy knowing your i9 9900K computer will have enough life for years to come.

This cooler is designed with C-shaped pipes that are up to snuff as far as Noctuas go and features two 140mm fans in what looks like round frames, thus ensuring a smooth and quiet cooling system for a wide range of CPUs.

This CPU cooler is designed to provide maximum cooling performance by efficiently transferring heat away from the processor. It does this through a series of four copper pipes and aluminum fins that are soldered together in an intricate pattern.

The Noctua NH-C14S is a great cooler for not only the newcomer, but also those looking to upgrade. It comes with their NT-H1 thermal compound and installation was smooth as can be – so it’s perfect if you’re in need of top notch cooling performance that will provide room for your RAM cards and video card clearance!

  • Low profile size
  • Suited for small form factors
  • Exceptional quality and ultra-quiet
  • Work efficiently and robust quality
  • Not an attractive color

The Best CPU Cooler For The I9 9900K: Factors To Consider​

Analyze Your Requirements

If you have a high-powered gaming PC and want to make sure it stays running all day with heavy tasks or high level gaming, then investing in the best CPU cooler is pretty much mandatory. 

On the other hand, if your system isn’t as powerful or you don’t need to run more than one program at a time, an affordable coolant should suffice for everyday use.

Air Cooling vs Liquid Cooling

Which type of cooler should you choose? Air or liquid? Liquid coolers are costly, but quieter than air coolers. Air coolers make more noise since their fans spin at higher speeds.

If you want to save money and won’t overclock, then it is best for you to use the air cooler. Not only are they less expensive but also just as effective at cooling your CPU with little extra noise.


All the above mentioned best CPU coolers for i9 9900K are compatible with universal sockets, but if the model isn’t specified as being universally socket-compatible then it is important to carefully look at its product description or reach out to customer service for information on compatibility.

Noise level

Loud fan noise creates distractions, so it’s important to consider buying an efficient CPU cooler which provides noiseless cooling. Low or no noise will make things more enjoyable for gamers who are looking for peace and quiet systems – especially during those long hours!


The size or dimension of the CPU cooler you buy is really important for compatibility. If it’s not compatible with your form factor or motherboard model, then there might be an inconvenience in fitting and that’s why I recommend considering a moderate sized one which fits both mobo and case.

Frequently Asked Questions:

How hot my i9 9900K can get?

The engineering team at Intel designed the new I9-9900K with a more efficient architecture that lets it run cooler than previous gen processors. However, if you are an overclocker it still can get extremely hot and might damage other PC components in the long run. Keep in mind, the core temperature above 85°C is not recommended by the manufacturer.

Does i9 9900k need liquid cooling?

If you’re a gamer, air cooling is all that’s needed. Most of the new games runs fine with air cooling, so there is no point spending extra on a cooler when you can just upgrade your graphics card. However, if your profession requires rendering at high speeds for long periods of time or any other number heavy tasks – liquid coolers might be worth looking into!

Can you air cool i9 9900K?

Air coolers are an ideal choice for cooling i9 9900k without breaking the bank. Noctua NH-D15 is an incredible air cooler for lower temperature of your computer so you can run it for longer hours without heating issues. Another great air cooler option is be quiet!’s Dark Rock Pro 4.

Is 120mm AIO enough for I9 9900K?

120MM is more than enough for i9 9900K. If you are looking for a 120mm AIO cooler to handle your overclocked Intel Core i9 9900K, the NZXT KRAKEN Z73 might be just what you need.

What is the best CPU cooler for i9 9900k?

The Intel I9 9900K CPU is one of the best processors out there, but it can get really hot when you’re a high end user. So what’s the best CPU cooler for this bad boy? Personally we and many others feel the Noctua NH D-15 is the best suited option for i9 9900K. However, if you are looking to spend extra to get an All in one (AIO) cooler NZXT Kraken Z73 is the way to go!


If you want to get the most out of your Intel Core i9 9900K, then it’s important to have a good CPU cooler. We’ve compiled this list of our favorite coolers for the i9-9900k so that you can make an informed decision when buying one.

In the end, it is important to consider your needs and wants when purchasing a CPU cooler. With that in mind, we hope this list has helped you find the best option for your cooling system. Now go out there and grab some great deals on these coolers!

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