For the 5800X3D, the Peerless Assassin is your best bet. It's one of the top-rated coolers regardless of price, and at just $35, it's an incredible value. This cooler can easily handle the 5800X3D's thermal demands.

I use an expensive Noctua cooler on my own rig, which is great. However, for my wife's upcoming build with my current 5800X3D, I'm choosing the Peerless Assassin. That should show you how much I trust its performance.

You simply don't need to spend more for excellent cooling on this CPU. The Peerless Assassin offers the perfect balance of performance and affordability for the 5800X3D.

Thermalright Peerless Assassin 120 SE is enough for 5800X3D.

Currently, Thermalright Peerless Assassin 120 SE is the best cooler for 5800X3D, and even great for 7800X3D.

Here are a few great options to consider:

1. Noctua NH-D15: This is a top-tier air cooler that offers excellent cooling performance. It features a dual-tower design with two 140mm fans, providing optimal heat dissipation. The NH-D15 is known for its quiet operation and is capable of handling the thermal demands of the 5800X3D.

2. Be Quiet! Dark Rock Pro 4: Another high-performance air cooler, the Dark Rock Pro 4 has a sleek black design and a dual-tower layout. It comes with two Silent Wings PWM fans that deliver excellent cooling while maintaining low noise levels. This cooler is a great match for the 5800X3D.

3. Arctic Liquid Freezer II 280: If you prefer an all-in-one (AIO) liquid cooler, the Arctic Liquid Freezer II 280 is a fantastic choice. It features a 280mm radiator with two PWM-controlled fans, providing outstanding cooling performance. The Liquid Freezer II series is known for its efficiency and quiet operation.

4. Corsair iCUE H150i Elite Capellix: Another top-performing AIO liquid cooler, the Corsair iCUE H150i Elite Capellix offers a 360mm radiator with three 120mm PWM fans. It delivers exceptional cooling performance and features customizable RGB lighting. The iCUE software allows for easy control and customization of fan speeds and lighting effects.

Ultimately, the choice between an air cooler and an AIO liquid cooler comes down to personal preference, case compatibility, and budget. Both the Noctua NH-D15 and Be Quiet! Dark Rock Pro 4 are excellent air coolers, while the Arctic Liquid Freezer II 280 and Corsair iCUE H150i Elite Capellix are top-performing AIO liquid coolers.

Whichever cooler you choose, make sure it fits your case and meets your aesthetic preferences. Also, consider factors like noise levels and ease of installation when making your decision.

Noctua NH-D15: https://www.amazon.com/Noctua-NH-D15-heatpipe-NF-A15-140mm/dp/B00L7UZMAK/?tag=6890-20

For the AMD Ryzen 7 5800X3D, the Dark Rock 5 is an excellent high-performance air cooler, known for great cooling and quiet operation.

Cheaper but still good options:

1. DeepCool AK620
2. Scythe Fuma 2

Budget-friendly alternatives that should suffice:

1. Scythe Mugen 5
2. Arctic Freezer 34 eSports Duo
3. Noctua NH-U12S Redux

These offer a good balance of performance and value, though they may run slightly louder or cooler than premium options.

Depending on your case, consider a 240mm AIO like the Arctic Liquid Freezer II for excellent cooling and potential overclocking headroom.

Remember to check cooler dimensions to ensure compatibility with your case and components. Good luck with your build!