5 Best CPU Coolers For Ryzen 9 3900x 2023

Choosing the best CPU cooler is important when upgrading your PC to the latest generation. You must ensure that your new CPU cooler can keep your current CPU cool enough and provide good performance.

Various types of CPU coolers are available in the market, and each type of CPU cooler has pros and cons.

It is hard to choose the best CPU cooler for Ryzen 9 3900x because there are many things to consider, like size, design, and price. I have reviewed the best CPU coolers for Ryzen 9 3900x that are affordable and worth your spending. Let’s check out the best CPU coolers for Ryzen 9 3900x and see the pros and cons of each product.

At a Glance:

 BEST CPU Coolers For Ryzen 9 3900x

DesignCPU CoolerRetailer
Best Pick1. DeepCool AK620
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2. Noctua NH-U12A chromax.Black
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Staff Pick3. NH-L9a-AM4 chromax.black
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4. Arctic Liquid Freezer II 240mm
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Budget Pick5. EK-AIO 360 D-RGB
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1. DeepCool AK620

Best Pick

The DeepCool AK620 is a high-end cooling solution for Intel and AMD processors. I’ve used many cooling solutions, but this is the best.

It supports the latest Intel and AMD processors, which is important for me. I also want my cooling solution to be powerful and reliable.DeepCool is well-known for making top-quality cooling solutions, and the AK620 is no exception.

It has 6 heat pipes to transfer heat efficiently and a dense fin array to prevent any hot spots. The heat pipes are made of copper and nickel plates. They are also covered with thermal grease to ensure smooth heat transfer.

See also  4 Best CPU cooler for AMD Ryzen 9 5900x (Tested) 2023

I like the dual-tower design. It allows for better heat distribution and for the fans to be placed in the best position. The fans have a PWM design, so you can adjust the speed to suit the situation.

It’s important to note that the fans are not included, so you’ll need to get them separately. If you’re looking for a powerful yet silent cooling solution, then the DeepCool AK620 is worth a look.


  • Super quiet operation
  • Large base to increase stability
  • The stable and solid base design
  • Strong aluminum frame
  • Includes a 240-watt power supply unit
  • Two-year warranty


  • The fan speed is not adjustable; only two speeds
  • No fan controller

2. Noctua NH-U12A chromax.Black

The Noctua NH-U12A is one of the best CPU coolers on the market, and it’s designed for high-end processors like the Intel Core i9, i7, i5, i3 (e.g., 12900K, 12700K, 12600K) and AMD Ryzen (e.g., 7950X, 7900X, 7700X, 7600X).

I use this for my rig to get the most out of my processor. It’s a great case, has RAM and PCIe compatibility, and doesn’t overhang the RAM slots on LGA17xx, LGA1200, and AM4, so it doesn’t block the PCIe on most ATX and Micro-ATX motherboards.

The Noctua cooler is a bit bulky, but that makes it easier to install and removes the risk of scratching your motherboard. It’s also a bit noisy at idle, but the fans are efficient and can provide decent cooling even under heavy loads.

With a 6-year manufacturer’s warranty, Noctua is one of the most trusted brands on the market. I’ve had the NH-U12A for over a year, and it’s still strong.


  • Highly efficient fans
  • Premium components
  • Clean and quiet; suitable for gamers
  • Low-noise operation


  • Expensive

3. NH-L9a-AM4 chromax.black

Staff Pick

Noctua’s NH-L9a-AM4 is one of the best low-profile CPU coolers we’ve tested, and it’s a great choice for AMD AM4 users with small form factor (SFF) builds.

The Noctua NH-L9a-AM4 is an SFF CPU cooler that can fit on an AM4-compatible motherboard without requiring additional holes. It has a compact footprint of 37mm, which makes it ideal for small form factor (SFF) builds and HTPCs.

While most coolers are tall and wide, Noctua’s NH-L9a-AM4 has a small footprint and a low profile. That means it won’t take up much space and is better suited for SFF builds and smaller form factor (SFF) builds.

You can use the NH-L9a-AM4 on any AM4 motherboard with 100% compatibility. The cooler uses low-profile fans and near-socket connectors for maximum compatibility. It also has a low-profile, Low-Noise Adaptor (LNA) fan and automatic speed control.

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The Noctua NH-L9a-AM4 has a silent, premium-grade NF-A9x14 fan with a maximum rotational speed of 2000rpm and a Low-Noise Adaptor (LNA) that automatically adjusts fan speed based on ambient temperature. The fan is quiet and produces less than 27 dBA at idle. It can handle up to 95mW at full speed, which should be plenty for modern processors.

The NH-L9a-AM4 is compatible with all AMD Ryzen and Ryzen Threadripper CPUs and the latest generation of AMD APUs (Ryzen 3rd Gen, Ryzen 5th Gen, Ryzen 7th Gen, and Ryzen Threadripper). It has a 6-year warranty, and Noctua provides a 30-day money-back guarantee.


  • Easy to install; built-in screw holes make it easy to mount
  • Compact design; can be installed on small form factor motherboards
  • Sleek and modernistic look
  • Offers interference-free wireless connectivity with low latency


  • Some users may find it difficult to install; does not include screws
  • Not compatible with Intel Z270 or H270 motherboards

4. Arctic Liquid Freezer II 240mm

The Liquid Freezer II has many nice features, including being compatible with both Intel and AMD processors. The LGA1700 compatible cooler has a pump that is efficient and cool, and it’s PWM controlled so that you can adjust the speed of the pump with the push of a button.

The cooler is a nice-looking piece, too. The front of the cooler has two 120 mm fans and a pump. The back of the cooler is where the main radiator is located. There’s a 120 mm fan there too, and there’s also a small fan on the bottom of the cooler. The PWM cable of the fans is integrated into the sleeved tubing, which makes the cables look cleaner.

The cooler is also maintenance-free, which is great. There’s no need to refill the water tank now and then, and there’s no need to clean the radiator and pump.

This well-made cooler does a good job of keeping the CPU at the right temperature. The pump and fans are efficient, and it’s also a very quiet cooler. The water loop is also sealed and maintenance-free.

5. EK-AIO 360 D-RGB

Budget Pick

When it comes to a water-cooling computer, we need to be able to install it without any hassle or stress. We also want it to be reliable and last for many years.

The EK AIO is a great option because it fits all the requirements. It installs very easily and is compatible with all modern Intel and AMD CPU sockets, including the new Ryzen CPUs.

The radiator is fully toolless, so it’s quick and easy to install. It’s designed to be universal so that it can be used in almost any case design.

While it comes with the standard EK-Vardar fans, the EK AIO also features D-RGB lighting. This means that the EK AIO will light up when you turn on your PC, and a dedicated RGB controller can also control it.

The EK AIO also has a water block compatible with most of the latest Intel and AMD CPU sockets. You won’t have to worry about compatibility issues and can use the EK AIO immediately.

When it comes to durability, the EK AIO has been designed to withstand extreme temperatures. It comes with reinforced and sleeved rubber tubing, and it’s protected with an aluminum cover. This makes it a great choice for those who like to install water-cooling rigs on their computers.


  • AIO cooler
  • Variable speed fans
  • Water cooling
  • RGB lighting
  • Supports dual fans
  • Easy to install
  • Easy to control


  • No cons.

Things to Consider Before Buying the Best CPU Cooler For Ryzen 9 3900x

Choosing the Best CPU Cooler For Your Ryzen 9 3900xWhen it comes to choosing a CPU cooler, there are a few things you need to consider before buying one. First of all, make sure that you get a CPU cooler that will fit your system. If you don’t have room for a full-tower case, you may want to opt for a mid-tower or mini-ITX case instead.

It’s also important to know the size of the cooler you need, as well as the compatibility of the graphics card with the CPU cooler. Another thing you should keep in mind is the noise level of the CPU cooler. If you want to keep your PC running quietly, then a CPU cooler with good passive cooling capabilities may be the way to go.


In conclusion, getting to this point takes years of trial and error and, hopefully, a good bit of insight and wisdom. At some point, you realize that the only way to know something is to go out and do it truly.

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Matt Wilson
By Matt Wilson

Matt Wilson is a PC gaming and hardware expert with years of experience. He's a trusted tech product reviewer for gamers and tech enthusiasts.

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