Noctua NH-U9S vs Thermalright Assassin Spirit 120 EVO Dark CPU Cooler Air with 4×6mm HeatPipes

Overview of the Noctua NH-U9S and Thermalright Assassin Spirit 120 EVO Dark

When comparing the Noctua NH-U9S to the Thermalright Assassin Spirit 120 EVO Dark, the two CPU coolers cater to different user needs and budgets. The NH-U9S is priced at C$74.95, while the Assassin Spirit 120 EVO Dark is significantly more affordable at C$24.90. This stark price difference sets the stage for a closer examination of their features and performance.

Design and Compatibility

The Noctua NH-U9S features a compact single-tower design that stands at only 125mm in height, making it ideal for small form factor builds such as HTPCs and ITX setups. Its design ensures that it does not overhang RAM or PCIe slots on most current motherboards, offering excellent compatibility. In contrast, the Thermalright Assassin Spirit 120 EVO Dark measures 156mm in height and employs a more traditional 120mm cooler design. While it also supports a range of Intel and AMD sockets, its larger size may limit compatibility in tighter spaces.

Cooling Performance

The Noctua NH-U9S is renowned for its strong cooling performance, facilitated by its highly optimised NF-A9 92mm fan. This fan features PWM support and a Low-Noise Adaptor, ensuring ultra-quiet operation while effectively dissipating heat. Although the Thermalright Assassin Spirit 120 EVO Dark boasts a high-speed fan with a rotation speed of 1850 RPM, its overall cooling efficacy is less established than that of Noctua's offering. Thus, while both coolers perform admirably in their own right, the NH-U9S has the edge in terms of cooling performance, especially in noise-sensitive environments.

Installation and Ease of Use

The installation process for the Noctua NH-U9S is straightforward thanks to its SecuFirm2 mounting system, which is compatible with various Intel and AMD sockets, including LGA1700 and AM4. Noctua also includes high-end NT-H1 thermal paste, making it a comprehensive package. On the other hand, the Thermalright Assassin Spirit 120 EVO Dark also provides a user-friendly installation experience but requires the original backplate from the motherboard for AM4/AM5 installations. While both coolers are designed for ease of use, the NH-U9S offers a slight advantage in terms of bundled accessories.

Build Quality and Warranty

Noctua is well-known for its premium build quality, and the NH-U9S is no exception, backed by a 6-year manufacturer’s warranty. This dedication to quality ensures longevity and reliability for users investing in this cooler. Conversely, while Thermalright has over 20 years of development history, it does not explicitly state a warranty period for the Assassin Spirit 120 EVO Dark. This lack of information could be a concern for potential buyers prioritising long-term reliability.

Fan Technology and Noise Levels

The Noctua NH-U9S is equipped with a highly optimised NF-A9 92mm fan, which not only provides effective cooling but also operates quietly due to its PWM support and Low-Noise Adaptor. This makes it an excellent choice for users who prioritise a silent computing experience. The Thermalright Assassin Spirit 120 EVO Dark, with its PWM temperature control function, also adjusts fan speed based on temperature, but its maximum rotation speed of 1850 RPM suggests that it may be noisier under load compared to the NH-U9S. Therefore, those sensitive to noise may prefer the quieter operation of Noctua.

Price and Value Proposition

The price difference between the Noctua NH-U9S at C$74.95 and the Thermalright Assassin Spirit 120 EVO Dark at C$24.90 is significant. While the NH-U9S offers premium features, performance, and build quality, the Assassin Spirit 120 EVO Dark provides an excellent price-to-performance ratio that appeals to budget-conscious consumers. For users who do not require the highest-end cooling and are looking for a cost-effective solution, the Thermalright cooler is a compelling option.

User Experience and Reputation

Noctua has built a strong reputation in the cooling market, particularly among enthusiasts who demand high performance and low noise. The NH-U9S has received positive feedback for its reliability and effective cooling solutions. In contrast, while Thermalright is also a reputable brand, particularly in the Chinese market, its popularity and user experience may not be as widely recognised in North America. This could influence buying decisions, especially among users looking for a cooler with established credibility.

Which should you buy?

Choosing between the Noctua NH-U9S and the Thermalright Assassin Spirit 120 EVO Dark ultimately depends on your specific needs and budget. If you prioritise performance, quiet operation, and build quality, the Noctua NH-U9S is the superior choice at C$74.95. However, if you are looking for an affordable, functional cooler that provides decent performance without breaking the bank, the Thermalright Assassin Spirit 120 EVO Dark at C$24.90 is a solid option. Consider your requirements and make an informed decision based on the strengths of each cooler.