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Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for vs Thermalright Assassin X 120R SE V2 CPU Cooler, 4×

Updated August 2026 — Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for wins on value and installation, Thermalright Assassin X 120R SE V2 CPU Cooler, 4× wins on cooling and performance.

The Thermalright Assassin X 120R SE V2 offers superior cooling performance and compatibility, making it the better choice for most users.

Why Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for is better

Price

Noctua kit is cheaper by $6.64

Simplicity

Easier installation with stock backplate

Reliability

Renowned SecuFirm2 quality

Why Thermalright Assassin X 120R SE V2 CPU Cooler, 4× is better

Cooling

Superior cooling performance with PWM fan

Compatibility

Supports multiple Intel and AMD sockets

Design

Complex design with heat pipes for efficiency

Overall score

Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for
70
Thermalright Assassin X 120R SE V2 CPU Cooler, 4×
85

Specifications

SpecNoctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit forThermalright Assassin X 120R SE V2 CPU Cooler, 4×
TypeMounting KitCPU Cooler
Price$9.95$16.59
Fan SpeedN/A1550 RPM
AirflowN/A66.17 CFM
Socket SupportAM5/AM4AM4/AM5 & Intel

Dimension comparison

Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit forThermalright Assassin X 120R SE V2 CPU Cooler, 4×

Overview of the Products

In this comparison, we will look at the Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for AMD AM5 & AM4 versus the Thermalright Assassin X 120R SE V2 CPU Cooler. The Noctua mounting kit is priced at $9.95, while the Thermalright cooler costs $16.59, making the latter about 67% more expensive. Each product serves distinct purposes—one is a mounting kit, while the other is a complete cooling solution.

Target Audience and Use Cases

The Noctua NM-AM5/4-MP83 is specifically designed for users who own compatible Noctua CPU coolers and want to install them on AMD’s AM5 and AM4 sockets. It’s an upgrade kit aimed at enhancing installation convenience and reliability. In contrast, the Thermalright Assassin X 120R SE V2 is a full-fledged CPU cooler suitable for both AMD and Intel platforms. Its versatility makes it appealing to a wider audience, including gamers and overclockers seeking efficient cooling solutions.

Price Comparison

The Noctua mounting kit retails for $9.95, while the Thermalright cooler is priced at $16.59. This makes the Noctua kit about $6.64 cheaper than the Thermalright, which is a significant difference in the budget-conscious segment. Given the price, those looking for a simple mounting solution might find more value in the Noctua option, especially if they already own a compatible cooler.

Design and Build Quality

Design-wise, the Noctua NM-AM5/4-MP83 boasts a tailored setup for AMD sockets, utilizing the motherboard's stock backplate, which simplifies installation. The emphasis on reliability and optimal contact pressure makes it a solid choice for Noctua users. On the other hand, the Thermalright Assassin X 120R SE V2 features a more complex design with four heat pipes and a high-performance fan that operates at 1550 RPM. This design aims to enhance cooling efficiency, making it suitable for high-performance CPUs.

Cooling Performance

Cooling performance is where the Thermalright Assassin X 120R SE V2 shines. It includes a 120mm PWM fan with a maximum airflow of 66.17 CFM and a noise level of up to 25.6 dB(A), which indicates effective cooling while maintaining a quiet operation. The Noctua NM-AM5/4-MP83, while it enhances mounting capabilities, does not directly provide cooling performance as it is merely a mounting kit. Thus, for users focused on cooling efficiency, the Thermalright option is clearly the better choice.

Installation Process

The Noctua NM-AM5/4-MP83 is designed for straightforward installation, requiring no additional components beyond the stock AMD backplate. This makes it user-friendly, especially for those who may not be experienced in PC building. In contrast, the installation process for the Thermalright Assassin X 120R SE V2 is slightly more involved, requiring the correct mounting hardware for various CPU socket types. While both products aim for ease of use, the Noctua kit has the edge for simplicity.

Compatibility

In terms of compatibility, the Noctua NM-AM5/4-MP83 is tailored for use with Noctua coolers on AM5 and AM4 sockets, making it perfect for AMD users. The Thermalright Assassin X 120R SE V2, however, supports a broader range of sockets, including several Intel and AMD configurations, making it a more versatile option for mixed-platform users. This flexibility can be a decisive factor for those who may upgrade their systems in the future.

Which should you buy?

When deciding between the Noctua NM-AM5/4-MP83 SecuFirm2 Mounting Kit and the Thermalright Assassin X 120R SE V2 CPU Cooler, the choice hinges on your specific needs. If you are looking for an affordable, reliable mounting solution specifically for Noctua coolers on AMD platforms, the Noctua kit at $9.95 is an excellent option. However, if you require a full cooling system that offers superior performance and compatibility across different sockets, the Thermalright cooler at $16.59 provides greater value despite its higher price. Ultimately, the right choice depends on whether you prioritize installation simplicity or cooling efficiency.