Noctua NH-U9S chromax.Black, vs Thermalright Peerless Assassin 120 Mini Black CPU
Updated August 2026 — Noctua NH-U9S chromax.Black, wins on warranty and cooling perf, Thermalright Peerless Assassin 120 Mini Black CPU wins on compatibility.
The Noctua NH-U9S chromax.Black offers superior performance and quieter operation, making it a better investment despite its higher price.
Why Noctua NH-U9S chromax.Black, is better
Performance
Noctua is renowned for its cooling efficiency.
Noise Level
Noctua operates whisper-quiet at idle.
Brand Reputation
Noctua has over 100 awards for quality.
Why Thermalright Peerless Assassin 120 Mini Black CPU is better
Price
Thermalright is significantly cheaper.
Size
Thermalright has a slightly larger cooling area.
Fan Speed
Thermalright's fan operates at a higher RPM.
Overall score
Specifications
| Spec | Noctua NH-U9S chromax.Black, | Thermalright Peerless Assassin 120 Mini Black CPU |
|---|---|---|
| Cooling Type | Air | Air |
| Socket Compatibility | Intel LGA1851, LGA1700, AMD AM5 | Intel LGA1851, LGA1700, AMD AM4 |
| Fan Speed | 1200 RPM | 1500 RPM |
| Air Flow | 50 CFM | 66.87 CFM |
| Warranty | 6 years | 3 years |
Dimension comparison
Price Comparison
When it comes to pricing, the Thermalright Peerless Assassin 120 Mini is significantly more economical than the Noctua NH-U9S chromax.Black. The Peerless Assassin 120 Mini is priced at $34.39, while the NH-U9S chromax.Black comes in at $74.95. This means that the Noctua model is about 118% more expensive than its competitor. If budget is a primary consideration, the Thermalright cooler presents a compelling option, especially for those looking to save money without sacrificing essential cooling performance.
Design and Aesthetics
In terms of design, both coolers have their distinct visual appeal but cater to different preferences. The Noctua NH-U9S chromax.Black boasts an all-black design that blends seamlessly with various color schemes, making it an excellent choice for users who prioritize aesthetics. Meanwhile, the Thermalright Peerless Assassin 120 Mini also features a striking black look with a CNC precision micro-engraved copper base, designed for a modern and sleek appearance. While both coolers are visually attractive, the Noctua's compact 92mm size is advantageous for installations with limited space, as it does not overhang RAM slots or block PCIe ports, unlike the slightly larger Thermalright model.
Performance Capabilities
When it comes to cooling performance, the Noctua NH-U9S chromax.Black is renowned for its efficiency. It features the award-winning NF-A9 92mm fan, which offers excellent cooling performance under load while remaining whisper quiet at idle. The Thermalright Peerless Assassin 120 Mini is equipped with a 120mm PWM fan that operates at a maximum speed of 1500 RPM, providing an air flow of 66.87 CFM with a noise level of ≤ 25.6 dB(A). While both coolers are effective, the Noctua's design and fan technology are often lauded in reviews for delivering superior cooling, especially in compact setups.
Installation Process
The installation process can significantly affect user experience, and both products aim to make this as straightforward as possible. The Noctua NH-U9S chromax.Black includes the SecuFirm2 mounting system, which is designed for easy installation across multiple socket types, including Intel LGA1851, LGA1700, and AMD AM5 & AM4. In comparison, the Thermalright Peerless Assassin 120 Mini also provides a user-friendly installation experience, with a comprehensive mounting kit that supports a wide range of Intel and AMD sockets. While both coolers excel in installation ease, the Noctua's reputation for reliability and user support may sway those looking for a hassle-free setup.
Noise Levels
Noise levels are an important consideration for many PC builders, particularly those who prefer a quieter environment. The Noctua NH-U9S chromax.Black is designed to operate quietly, providing full cooling performance under load while maintaining a whisper-quiet profile at idle. On the other hand, the Thermalright Peerless Assassin 120 Mini operates at a noise level of ≤ 25.6 dB(A), which is relatively quiet for a 120mm fan. While both products emphasize low noise levels, the Noctua model is often recognized for its superior acoustic performance, making it a more favorable choice in noise-sensitive environments.
Brand Reputation
Brand reputation plays a significant role in purchasing decisions, especially in the competitive world of CPU coolers. Noctua has established itself as a premium brand in the cooling market, receiving over 100 awards and recommendations from international hardware websites for its products. The Noctua NH-U9S chromax.Black is backed by a 6-year manufacturer’s warranty, further solidifying its reputation for quality and reliability. Conversely, Thermalright, with over 20 years of history, has gained a solid foothold in the market but may not carry the same level of prestige as Noctua. For consumers prioritizing brand trust and proven performance, Noctua likely stands out.
Compatibility
Compatibility is crucial when selecting a CPU cooler, and both models cater to a range of systems. The Noctua NH-U9S chromax.Black is compatible with multiple Intel and AMD sockets, making it a versatile choice for various builds. The Thermalright Peerless Assassin 120 Mini also supports a wide range of Intel and AMD platforms, including the latest AM5 and LGA1700 sockets. While both coolers are designed for broad compatibility, the Noctua's compact design may offer an edge in smaller cases or builds with tight clearances, ensuring users can avoid potential installation issues.
Which should you buy?
Ultimately, the choice between the Noctua NH-U9S chromax.Black and the Thermalright Peerless Assassin 120 Mini comes down to specific needs and preferences. If budget is your primary concern, the Thermalright cooler is significantly cheaper at $34.39 compared to Noctua’s $74.95 price tag. However, if you value superior performance, quieter operation, and a strong brand reputation, the Noctua NH-U9S chromax.Black might justify its higher price. Both coolers provide excellent cooling capabilities and compatibility with various systems, but the Noctua’s advantages may ultimately make it the better investment for those who prioritize long-term reliability and performance.

