Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for vs Thermalright Peerless Assassin 120 Black CPU Air
Updated August 2026 — Thermalright Peerless Assassin 120 Black CPU Air leads on height and width.
The Thermalright Peerless Assassin 120 Black offers superior cooling performance and versatility compared to the Noctua NM-AM5/4-MP83, which is merely a mounting kit.
Why Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for is better
Price
Noctua NM-AM5/4-MP83 is significantly cheaper.
Installation
Easier installation due to stock backplate use.
Compatibility
Specifically designed for Noctua coolers.
Why Thermalright Peerless Assassin 120 Black CPU Air is better
Cooling Performance
Thermalright has advanced cooling features.
Versatility
Compatible with a wider range of CPU sockets.
Build Quality
Robust design with dual fans and heat pipes.
Overall score
Specifications
| Spec | Noctua NM-AM5/4-MP83 SecuFirm2 Mounting-Kit for | Thermalright Peerless Assassin 120 Black CPU Air |
|---|---|---|
| Price | $9.95 | $38.90 |
| Heat Pipes | 0 | 6 |
| Fan Count | 0 | 2 |
| TDP | N/A | 245W |
| Socket Compatibility | AM5/AM4 | AM4/AM5/Intel |
Dimension comparison
Overview of the Noctua NM-AM5/4-MP83 and Thermalright Peerless Assassin 120 Black
The Noctua NM-AM5/4-MP83 is primarily a mounting kit designed for compatibility with AMD's AM5 and AM4 sockets, while the Thermalright Peerless Assassin 120 Black is a complete CPU cooler with advanced heat dissipation features. Priced at $9.95, the Noctua NM-AM5/4-MP83 offers a cost-effective solution for those looking to install compatible Noctua coolers on AMD processors. In contrast, the Thermalright Peerless Assassin 120 Black, priced at $38.90, boasts superior cooling technology with a complex design featuring six heat pipes and dual PWM fans.
Design and Build Quality
The design and build quality of a CPU cooler can significantly influence its performance. The Noctua NM-AM5/4-MP83 is a well-engineered mounting kit, tailored specifically for Noctua CPU coolers, ensuring optimal contact pressure and reliability. This kit utilizes the motherboard's stock AMD backplate, simplifying installation. On the other hand, the Thermalright Peerless Assassin 120 Black showcases a robust structure with an aluminum heatsink cover and a unique twin-tower design, allowing for effective heat dissipation. The cooler's black electroplating finish and metal fasteners contribute to its durability and aesthetic appeal.
Cooling Performance
When comparing cooling performance, the Thermalright Peerless Assassin 120 Black outshines the Noctua NM-AM5/4-MP83. The Thermalright cooler is equipped with six heat pipes and dual 120mm PWM fans, capable of delivering an air flow of 66.17 CFM at a noise level of only 25.6 dB(A). This setup is engineered to handle a thermal design power (TDP) of up to 245W, making it suitable for high-performance CPUs. In contrast, the Noctua NM-AM5/4-MP83 does not provide cooling itself but rather supports the installation of Noctua coolers, which may vary in performance.
Compatibility
Compatibility is crucial when choosing CPU coolers and mounting solutions. The Noctua NM-AM5/4-MP83 is specifically designed for Noctua coolers with an 83mm mounting pitch, facilitating installation on AMD’s AM5 and AM4 sockets. This focused compatibility ensures seamless integration with certain Noctua models. Conversely, the Thermalright Peerless Assassin 120 Black is compatible with a broader range of sockets, including Intel's LGA 1700 and various AMD sockets like AM4 and AM5. This wider compatibility makes it a versatile choice for users with different CPU setups.
Installation Process
The installation process can make or break a user’s experience. The Noctua NM-AM5/4-MP83 is designed for straightforward installation, relying on the stock AMD backplate, which simplifies the process for users familiar with AMD systems. This ease of installation is a significant advantage for users who want to upgrade their cooling solution without extensive setup. In contrast, the Thermalright Peerless Assassin 120 Black, while also designed for relatively easy installation, requires a more involved setup due to its dual-tower design and additional components, which may be a consideration for less experienced users.
Price Comparison
In terms of pricing, the Noctua NM-AM5/4-MP83 is considerably cheaper at $9.95, making it an attractive option for those who already own compatible Noctua coolers. This price point is about 75% less than the Thermalright Peerless Assassin 120 Black, which retails for $38.90. While the Noctua kit offers a budget-friendly solution for mounting, the Thermalright cooler’s higher price reflects its advanced cooling capabilities and comprehensive design.
Brand Reputation
Both Noctua and Thermalright are respected brands in the CPU cooling market, known for their commitment to quality and performance. Noctua is renowned for its reliability and innovative designs, often praised for low noise levels and efficient cooling. Meanwhile, Thermalright has established a reputation for producing high-performance coolers that compete effectively in various segments. Choosing between them may come down to personal preference based on brand loyalty or specific performance needs.
Which should you buy?
Ultimately, the decision between the Noctua NM-AM5/4-MP83 and the Thermalright Peerless Assassin 120 Black hinges on your specific needs. If you're seeking a budget-friendly mounting solution for an existing Noctua cooler and have an AM5 or AM4 CPU, the Noctua NM-AM5/4-MP83 is an excellent choice at just $9.95. However, if you require a complete cooling solution with superior performance capabilities, the Thermalright Peerless Assassin 120 Black, priced at $38.90, offers advanced features that can effectively handle high-performance CPUs. Consider your cooling needs, existing components, and budget to make the best choice.

