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Noctua NH-L9x65 vs Thermalright Phantom Spirit 120SE CPU Air Cooler,

Updated August 2026 — Noctua NH-L9x65 wins on installation eas, Thermalright Phantom Spirit 120SE CPU Air Cooler, wins on cooling performa and noise level.

The Noctua NH-L9x65 excels in compactness and quiet operation, while the Thermalright Phantom Spirit 120SE offers superior cooling performance at a lower price.

Why Noctua NH-L9x65 is better

Compact Design

Ideal for small form factor builds.

Quiet Operation

Optimized for ultra-quiet performance.

Ease of Installation

SecuFirm2 mounting system simplifies setup.

Why Thermalright Phantom Spirit 120SE CPU Air Cooler, is better

Cooling Performance

Superior cooling with seven heat pipes.

Price

Significantly cheaper at $35.90.

Airflow

Max airflow of 66.17 CFM.

Overall score

Noctua NH-L9x65
75
Thermalright Phantom Spirit 120SE CPU Air Cooler,
85

Specifications

SpecNoctua NH-L9x65Thermalright Phantom Spirit 120SE CPU Air Cooler,
Price$69.95$35.90
Fan RPMN/A1500
Noise LevelN/A25.6 dB(A)
CompatibilityLGA1851, LGA1700, AM4/AM5LGA1851, LGA1700, AM4/AM5
AirflowN/A66.17 CFM

Dimension comparison

Noctua NH-L9x65Thermalright Phantom Spirit 120SE CPU Air Cooler,

Overview of the Noctua NH-L9x65 and Thermalright Phantom Spirit 120SE

The Noctua NH-L9x65 is priced at $69.95, while the Thermalright Phantom Spirit 120SE is significantly cheaper at $35.90, making it about 49% less expensive. This price difference sets the stage for a comparison that considers performance, design, and suitability for various builds. Both coolers cater to distinct needs and preferences, which will be explored in the following sections.

Design and Build Quality

The Noctua NH-L9x65 boasts a compact design with a total height of only 65mm, perfect for small form factor builds such as HTPCs and ITX setups. Its low-profile design ensures it doesn’t overhang RAM or PCIe slots, which is an essential feature in tight spaces. In contrast, the Thermalright Phantom Spirit 120SE features a taller build at 154mm and includes seven heat pipes, which enhance its cooling capabilities. The combination of aluminum and copper in its construction maximizes heat dissipation. While the Noctua is designed for compactness, the Thermalright prioritizes performance, making the choice dependent on your specific case and cooling requirements.

Cooling Performance

When it comes to cooling performance, the Noctua NH-L9x65 is recommended for CPUs with low to moderate heat dissipation, making it suitable for processors like the AMD Ryzen 7950X3D and Intel 285K. It features a highly optimized NF-A9x14 slim 92mm fan that supports PWM and operates quietly, especially when using the included Low-Noise Adaptor. The Thermalright Phantom Spirit 120SE, however, leverages its seven heat pipes and dual 120mm TL-C12B V2 PWM fans to deliver superior cooling performance, with a maximum airflow of 66.17 CFM and a noise level of up to 25.6 dB(A). If you are looking for maximum cooling efficiency, the Thermalright is the clear winner.

Compatibility

The Noctua NH-L9x65 is compatible with a wide range of Intel and AMD sockets, including LGA1851, LGA1700, LGA1200, and AM4/AM5. This broad compatibility makes it a versatile option for many builds. Meanwhile, the Thermalright Phantom Spirit 120SE also supports various sockets, specifically LGA1851, LGA1700, and AM4/AM5, and comes with the necessary mounting hardware for installation across these platforms. Both coolers cater to modern CPU designs, but if your build requires a low-profile cooler, the Noctua might be the better fit.

Noise Levels

Noise levels are a crucial consideration for many users, especially those building systems for media consumption or gaming. The Noctua NH-L9x65 is designed for ultra-quiet operation, thanks to its optimized fan and Low-Noise Adaptor, which allows for speed control to minimize noise. While specific noise levels for the Noctua aren't provided, it's known for its silent operation. The Thermalright Phantom Spirit 120SE, on the other hand, operates at a maximum noise level of 25.6 dB(A), which is relatively quiet, but might not be as silent as the Noctua in low-load scenarios. For those prioritizing a silent PC, the Noctua may have an edge.

Installation Process

The installation process can significantly influence user experience. The Noctua NH-L9x65 includes the SecuFirm2 mounting system, which simplifies the installation on various Intel and AMD sockets. This ease of setup is a strong point for the Noctua, especially for users who may not have extensive experience with PC building. Conversely, the Thermalright Phantom Spirit 120SE is designed to be user-friendly as well, providing mounting plates and clear installation instructions for compatibility with multiple CPU socket types. Both coolers offer straightforward installation, but the Noctua's reputation for ease might be a deciding factor for some users.

Brand Reputation

Noctua has established a strong reputation in the cooling market, known for its quality and performance. The NH-L9x65 is often praised for its durability and effectiveness, especially in compact builds. Thermalright, while also reputable and with over 20 years of experience, may not have the same level of brand recognition as Noctua in the high-performance cooling segment. Depending on personal preference and brand loyalty, some users may opt for the Noctua based on its well-established track record.

Price to Performance Ratio

The Noctua NH-L9x65 is priced at $69.95, while the Thermalright Phantom Spirit 120SE is available for $35.90, making it about 49% cheaper. Despite the lower price, the Thermalright offers impressive features, including dual fans and seven heat pipes, which enhance its cooling performance. For users on a budget, the Phantom Spirit offers a compelling price-to-performance ratio. However, if you require a low-profile design and prioritize silent operation, the Noctua could justify its higher price. Ultimately, the decision hinges on whether cooling performance or budget constraints are more critical for your needs.

Which should you buy?

Choosing between the Noctua NH-L9x65 and the Thermalright Phantom Spirit 120SE ultimately comes down to your specific needs. If you require a compact, low-profile cooler that excels in quiet operation, the Noctua is the better choice, albeit at a higher price. On the other hand, if you're looking for superior cooling performance at a more affordable price, the Thermalright is a strong contender. For those prioritizing budget without compromising too much on performance, the Thermalright Phantom Spirit 120SE emerges as an excellent option.