Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for vs Thermalright Assassin King 120 SE White ARGB CPU
Updated August 2026 — Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for wins on installation eas, Thermalright Assassin King 120 SE White ARGB CPU wins on aesthetics and cooling performa.
The Thermalright Assassin King 120 SE offers superior cooling performance and aesthetic appeal compared to the Noctua NM-AM5/4-MP83 mounting kit.
Why Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for is better
Price
Noctua kit is cheaper at $9.95.
Installation
Easier installation using stock AMD backplate.
Simplicity
Designed specifically for Noctua coolers.
Why Thermalright Assassin King 120 SE White ARGB CPU is better
Cooling
Thermalright cooler has five heat pipes for better cooling.
Compatibility
Supports a wider range of CPU sockets.
Aesthetics
Features ARGB lighting for visual appeal.
Overall score
Specifications
| Spec | Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for | Thermalright Assassin King 120 SE White ARGB CPU |
|---|---|---|
| Price | $9.95 | $19.82 |
| Socket Support | AM5/AM4 | AM4/AM5/Intel |
| Fan RPM | N/A | 1550 |
| Noise Level | N/A | 25.6 dB(A) |
| Installation | Easy | Moderate |
Dimension comparison
Overview of Noctua NM-AM5/4-MP83 and Thermalright Assassin King 120 SE
The Noctua NM-AM5/4-MP83 is a mounting kit designed for Noctua CPU coolers, while the Thermalright Assassin King 120 SE is a complete air cooler. The Noctua kit is currently priced at $9.95, making it about 17% cheaper than the Thermalright cooler, which retails for $19.82. While both products cater to AMD's AM4 and AM5 sockets, they serve different purposes within the CPU cooling ecosystem.
Design and Build Quality
The Noctua NM-AM5/4-MP83 boasts a robust design tailored specifically for AMD's AM5 and AM4 sockets. This mounting kit utilizes the motherboard's existing stock AMD backplate, ensuring ease of installation and reliability. It is known for its outstanding contact pressure and straightforward setup, which is characteristic of Noctua's renowned SecuFirm2 quality. On the other hand, the Thermalright Assassin King 120 SE features a more complex design with dimensions of 120mm x 73mm x 148mm, making it a full-fledged air cooler. With a weight of 0.64 kg, it is built to provide both durability and effective cooling performance.
Cooling Performance
When it comes to cooling performance, the Thermalright Assassin King 120 SE stands out with its five heat pipes and a PWM fan that operates at up to 1550 RPM. This design allows it to provide an air flow of 66.17 CFM at a noise level of only 25.6 dB(A), making it efficient and relatively quiet. The Noctua NM-AM5/4-MP83, being just a mounting kit, does not provide direct cooling performance. Therefore, if cooling efficiency is your priority, the Thermalright cooler is the clear winner in this category.
Compatibility
Both products offer extensive compatibility, but they cater to different needs. The Noctua NM-AM5/4-MP83 is specifically designed for those who already own compatible Noctua coolers and want to upgrade their installation for AMD's latest sockets. It is engineered to work seamlessly with Ryzen 5, Ryzen 7, and Ryzen 9 processors. Conversely, the Thermalright Assassin King 120 SE is compatible with a broader range of CPU sockets, including Intel's LGA1700 and various AMD sockets beyond AM4. This versatility makes the Thermalright cooler a more flexible option for users who may switch between platforms.
Price Point
The Noctua NM-AM5/4-MP83 is priced at $9.95, making it a budget-friendly choice for those looking to improve their existing CPU cooler installation. In contrast, the Thermalright Assassin King 120 SE is priced at $19.82, which is about 100% more expensive than the Noctua kit. While both products offer value, your choice may depend on your budget and specific cooling needs.
Installation Process
The Noctua NM-AM5/4-MP83 is noted for its straightforward installation process, utilizing the stock AMD backplate, which minimizes complexity. This ease of use is a significant advantage for DIY builders or those new to PC assembly. On the other hand, the Thermalright Assassin King 120 SE comes with metal fasteners for both Intel and AMD platforms, which might require more effort during installation. While it is designed for an efficient fit, the extra components can make the installation process slightly more cumbersome compared to the Noctua kit.
Aesthetic Appeal
If aesthetics are important to you, the Thermalright Assassin King 120 SE features stunning ARGB lighting effects that can enhance the visual appeal of your PC build. The Noctua NM-AM5/4-MP83, being a mounting kit, does not contribute to the aesthetic aspect of your setup. If you want a cooler that not only performs well but also looks great, the Thermalright cooler would be the choice for you.
Which should you buy?
Choosing between the Noctua NM-AM5/4-MP83 and the Thermalright Assassin King 120 SE ultimately depends on your needs. If you're looking for a budget-friendly mounting solution for an existing Noctua cooler, the Noctua kit is an excellent choice at $9.95. However, if you require a complete cooling solution with robust performance and aesthetic appeal, the Thermalright Assassin King 120 SE at $19.82 stands out. In summary, for those focusing on performance and aesthetics, the Thermalright cooler is superior, while the Noctua kit is ideal for those who prioritize cost and simplicity.

