Thermalright Peerless Assassin 120 CPU Air Cooler vs Noctua NH-U9S

Design and Build Quality

The Thermalright Peerless Assassin 120 offers a robust dual-tower design, while the Noctua NH-U9S features a compact single-tower structure. The Peerless Assassin 120 is built with a full electroplated reflow welding process and has dimensions of 125mm x 135mm x 157mm, providing an effective heat dissipation area of 9600cm². This design is optimized for unrestricted installation, accommodating various setups without blocking RAM or PCIe slots. In contrast, the NH-U9S, measuring only 125mm in height, is tailored for small form-factor builds, making it an ideal choice for HTPCs and ITX systems. Both coolers exhibit high-quality construction, but their design philosophies cater to different user needs.

Cooling Performance

When it comes to cooling performance, the Thermalright Peerless Assassin 120 has a notable advantage with a TDP rating of 245W, supported by six pure copper heat pipes and two PWM fans that can reach speeds of 1500 RPM. This configuration can achieve a maximum airflow of 66.17 CFM, ensuring effective heat dissipation during intensive CPU tasks. On the other hand, the Noctua NH-U9S, while still providing strong cooling, is limited by its single NF-A9 92mm fan, which is optimized for low noise rather than maximum airflow. This design results in an ultra-quiet operation, but it may not match the raw cooling capability of the Thermalright model under heavy loads.

Noise Levels

The Thermalright Peerless Assassin 120 operates at a maximum noise level of 25.6 dB(A), which is quite respectable for a cooler of its performance level. The dual-fan setup is designed to balance cooling efficiency with acoustics, making it suitable for users who may be sensitive to noise. In comparison, the Noctua NH-U9S is renowned for its ultra-quiet operation, thanks in part to its highly optimized NF-A9 fan and the included Low-Noise Adaptor. While specific noise levels aren’t provided, Noctua fans are generally celebrated for their silent performance, which could appeal to users prioritizing a quiet computing environment over extreme performance.

Compatibility

Both coolers offer extensive compatibility with various CPU sockets. The Thermalright Peerless Assassin 120 supports a wide range of Intel sockets, including 1150, 1151, 1155, 1156, 1200, 1700, and more, alongside AMD’s AM4 and AM5. This versatility makes it suitable for a broad spectrum of builds. Conversely, the Noctua NH-U9S also provides excellent compatibility, supporting Intel LGA 1851, LGA 1700, LGA 1200, and LGA 115x, as well as AMD AM4 and AM5. While both coolers cater to popular CPU platforms, the Peerless Assassin 120 has a slight edge in its broader support for older Intel sockets.

Installation Process

The installation process for both coolers is user-friendly, though they differ in approach. The Thermalright Peerless Assassin 120 comes with metal fasteners designed for both Intel and AMD platforms, simplifying the setup process for users. The cooler's offset asymmetric layout allows for straightforward installation without interference with nearby components. The Noctua NH-U9S features the SecuFirm2 mounting system, praised for its ease of use and reliability. It includes high-end NT-H1 thermal paste, enhancing thermal conductivity. While both products are designed for user convenience, the Noctua may appeal to those who appreciate a more straightforward mounting solution.

Aesthetics and RGB Lighting

Aesthetic appeal is a significant consideration for many builders, and here the Thermalright Peerless Assassin 120 shines with its colorful ARGB lighting effects. The high-brightness LED fan blades create a visually striking setup, allowing for synchronization with motherboard lighting systems. This feature particularly attracts gamers and users who enjoy customizable aesthetics. In contrast, the Noctua NH-U9S prioritizes a more subdued and professional look, featuring a classic brown and beige fan design. While it may not offer RGB lighting, its reputation for quality and performance could be more appealing to users who prefer a clean, understated aesthetic.

Price Comparison

In terms of pricing, the Thermalright Peerless Assassin 120 is currently priced at C$51.39, making it a more budget-friendly option for those seeking efficient cooling without breaking the bank. Meanwhile, the Noctua NH-U9S carries a higher price tag of C$74.95, reflecting its reputation for quality and performance. While the Noctua offers excellent cooling and noise performance, the significant price difference—C$23.56—may influence cost-conscious buyers to consider the Thermalright as a compelling alternative.

Which should you buy?

Choosing between the Thermalright Peerless Assassin 120 and the Noctua NH-U9S ultimately depends on your specific needs and preferences. If you require robust cooling performance with a dual-tower design and customizable RGB aesthetics, the Thermalright Peerless Assassin 120 is an excellent choice, especially given its lower price. However, if you prioritise ultra-quiet operation, compact design, and ease of installation, the Noctua NH-U9S is worth considering, albeit at a higher cost. Assess your build requirements, budget, and aesthetic preferences to make the best decision for your CPU cooling needs.