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Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for vs Thermalright Assassin X120 Refined SE CPU Air

Updated July 2026 — Thermalright Assassin X120 Refined SE CPU Air leads on fan rpm and weight.

The Noctua NM-AM5/4-MP83 kit is an affordable mounting solution, while the Thermalright Assassin X120 offers superior cooling performance. Choose based on your specific needs.

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 backplate

Brand Reputation

Noctua is known for reliable mounting solutions

Why Thermalright Assassin X120 Refined SE CPU Air is better

Cooling Performance

Thermalright cooler provides effective heat dissipation

Compatibility

Supports a wider range of CPU sockets

Build Quality

Longer service life with AGHP technology

Overall score

Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for
75
Thermalright Assassin X120 Refined SE CPU Air
85

Specifications

SpecNoctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit forThermalright Assassin X120 Refined SE CPU Air
Price$9.95$17.90
Socket SupportAM5/AM4AM4/AM5, Intel
Noise LevelN/A25.6 dB(A)
Mounting TypeKitAir Cooler
Cooling TypeN/AAir

Dimension comparison

Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit forThermalright Assassin X120 Refined SE CPU Air

Overview of the Products

In this comparison, we look at the Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for AMD AM5 & AM4 and the Thermalright Assassin X120 Refined SE CPU Air Cooler. Both products cater to different needs in the CPU cooling market, but they serve distinct purposes. The Noctua kit is designed specifically for mounting Noctua CPU coolers on AMD sockets, while the Thermalright cooler is a standalone air cooling solution.

Price Comparison

The Noctua NM-AM5/4-MP83 kit is priced at $9.95, making it about 17% cheaper than the Thermalright Assassin X120, which retails for $17.90. If you're looking for a budget-friendly option to enhance your cooler's compatibility, the Noctua kit is an attractive choice. Conversely, if you need a complete air cooler solution, the Thermalright product justifies its higher price with its performance features.

Compatibility

The Noctua NM-AM5/4-MP83 kit is tailor-made for Noctua CPU coolers and is compatible with AMD's AM5 and AM4 sockets, utilizing the motherboard's stock backplate for installation. This ensures a straightforward installation process. In contrast, the Thermalright Assassin X120 supports a broader range of sockets, including Intel's LGA 1150/1151/1155/1200/1700 and AMD's AM4/AM5. This wide compatibility makes the Thermalright a versatile option if you're working with different platforms.

Installation Ease

The installation of the Noctua NM-AM5/4-MP83 is designed to be straightforward, relying on the existing AMD backplate for setup. This ease of installation can be a deciding factor for many users. On the other hand, the Thermalright Assassin X120, while also user-friendly, requires mounting hardware for both Intel and AMD platforms. However, given its added complexity, the Thermalright may take slightly longer to install compared to the Noctua kit.

Cooling Performance

The Thermalright Assassin X120 boasts a PWM fan that operates at 1550 RPM with a maximum airflow of 66.17 CFM, which is designed to provide efficient cooling while maintaining a noise level of just 25.6 dB(A). This performance is crucial for gamers and heavy users who require effective heat dissipation. In contrast, the Noctua NM-AM5/4-MP83 does not provide cooling capabilities by itself; rather, it serves as an installation kit to enhance the compatibility of existing coolers.

Build Quality

Noctua is renowned for its outstanding reliability and quality, which is evident in the NM-AM5/4-MP83 kit. The kit is synonymous with the SecuFirm2 quality standard, ensuring optimal contact pressure and durability. The Thermalright Assassin X120, with its aluminum heatsink cover and AGHP technology, also emphasizes long-lasting performance, boasting up to 20,000 hours of industrial service life. Both products exemplify high-quality craftsmanship, but they cater to different aspects of the cooling landscape.

Brand Reputation

Noctua has a strong reputation in the CPU cooling market, particularly for its mounting solutions that enhance the functionality of existing coolers. The NM-AM5/4-MP83 kit continues this tradition, offering a reliable product for users looking to upgrade. In comparison, Thermalright has been in the industry for over 20 years and is known for its innovative cooling solutions. The Assassin X120 is part of a long line of well-regarded products, making it a trustworthy choice for those in need of a new air cooler.

User Experience

Users often report that the installation of the Noctua NM-AM5/4-MP83 is seamless, requiring minimal effort and expertise. This ease of use can be particularly beneficial for those who may not be as tech-savvy. Meanwhile, the Thermalright Assassin X120 is praised for its cooling efficiency and quiet operation, making it a favorite among gamers and professionals who require both performance and low noise levels during operation.

Which should you buy?

Ultimately, the choice between the Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit and the Thermalright Assassin X120 Refined SE CPU Air Cooler depends on your specific needs. If you're looking for a cost-effective way to install Noctua coolers on AMD sockets, the Noctua kit is the clear winner at $9.95. However, if you need a comprehensive air cooling solution that supports various CPU sockets and offers superior cooling performance, the Thermalright cooler, priced at $17.90, will be the more suitable option.