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Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi vs Noctua NH-L9i-17xx

Updated August 2026The Thermalright Assassin X 120R offers better performance at a lower price, while the Noctua NH-L9i-17xx excels in compactness and quiet operation.

The Thermalright Assassin X 120R offers better performance at a lower price, while the Noctua NH-L9i-17xx excels in compactness and quiet operation.

Why Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi is better

price

Thermalright is significantly cheaper at C$28.39.

performance

Higher RPM fan provides better cooling efficiency.

features

Digital screen for real-time monitoring.

Why Noctua NH-L9i-17xx is better

noise

Quieter operation due to low-noise fan technology.

compactness

Ideal for small form factor builds.

brand reputation

Noctua is known for high-quality products.

Overall score

Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi
85
Noctua NH-L9i-17xx
75

Specifications

SpecThermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPiNoctua NH-L9i-17xx
Fan RPM20001600
CompatibilityIntel & AMDIntel only
WarrantyN/A6 years
Cooling TypeAirAir
ARGB LightingYesNo

Dimension comparison

Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPiNoctua NH-L9i-17xx

Overview of Thermalright Assassin X 120R Digital ARGB White and Noctua NH-L9i-17xx

The Thermalright Assassin X 120R Digital ARGB White CPU Cooler and the Noctua NH-L9i-17xx each provide distinct features catering to different users. The former is priced at C$28.39, while the latter is significantly higher at C$59.95. Understanding their specifications can help determine which is the better option for your CPU cooling needs.

Design and Build Quality

The Thermalright Assassin X 120R features a sleek design with a digital screen on its top cover, allowing users to monitor CPU and GPU temperatures in real-time. It integrates a 2000RPM PWM fan, promising effective heat dissipation with a combination of four 6mm heat pipes and a single tower structure. In contrast, the Noctua NH-L9i-17xx is renowned for its compact design, standing only 37mm tall, making it ideal for small form factor cases. It also boasts a premium NF-A9x14 slim 92mm fan, designed for low noise and high efficiency. Both coolers demonstrate excellent build quality, but their design philosophies cater to different setups.

Cooling Performance

When it comes to cooling performance, the Thermalright Assassin X 120R is equipped with a high-speed 2000RPM fan and advanced AGHP heat pipe technology, which enhances heat dissipation efficiency. This cooler is engineered to tackle moderate to high heat loads effectively. On the other hand, the Noctua NH-L9i-17xx, while not as powerful as the Thermalright, is still a proven performer, especially in compact builds. It is especially suitable for Intel’s LGA1851 and LGA1700 platforms, making it a reliable choice for users who prioritize a quieter operation.

Noise Levels

Noise levels are crucial for many users, particularly those in quiet environments. The Thermalright Assassin X 120R, although equipped with a powerful 2000RPM fan, incorporates silicone corner pads to reduce rotational noise. However, during peak operation, it may still produce more noise compared to the Noctua NH-L9i-17xx. The latter’s NF-A9x14 fan is known for its whisper-quiet operation, thanks to its low-noise adaptor and automatic speed control. Therefore, while the Thermalright may excel in cooling performance, the Noctua stands out in terms of low noise levels.

Compatibility

Compatibility is essential when selecting a CPU cooler, and both options have their strengths. The Thermalright Assassin X 120R is designed for broad compatibility, supporting both Intel and AMD platforms, making it versatile for various builds. However, it is essential to check the specific motherboard dimensions due to its tower design. Conversely, the Noctua NH-L9i-17xx is tailored specifically for Intel’s LGA1851 and LGA1700 sockets. Its compact design ensures it fits into small cases without obstructing RAM or PCIe slots, making it an excellent choice for compact builds.

Installation Process

The installation process can significantly affect the overall user experience. The Thermalright Assassin X 120R comes with a user-friendly setup, leveraging a straightforward installation method that pairs well with its digital monitoring features. Meanwhile, the Noctua NH-L9i-17xx includes its easy-to-use SecuFirm2 mounting system, which simplifies installation on Intel CPUs. Both coolers offer a hassle-free experience, but the Noctua’s inclusion of high-end thermal paste enhances its value.

Aesthetic Considerations

Aesthetics can play a significant role in a PC build, particularly for users who want a visually pleasing setup. The Thermalright Assassin X 120R features a modern look with its digital screen and ARGB lighting, appealing to gamers and enthusiasts aiming for a stylish rig. In contrast, the Noctua NH-L9i-17xx embraces a more subdued design, focusing on function over flashy aesthetics. While it may not turn heads, its reputation for high performance and reliability can often outweigh the need for a flashy appearance.

Price Comparison

Price is a significant factor when choosing components for your build. The Thermalright Assassin X 120R is priced at a very competitive C$28.39, making it an attractive option for budget-conscious consumers. In contrast, the Noctua NH-L9i-17xx is substantially more expensive at C$59.95. While the Noctua offers premium performance and low noise levels, the price difference is considerable. Depending on your budget and performance needs, this could be a decisive factor in your choice.

Which should you buy?

Deciding between the Thermalright Assassin X 120R Digital ARGB White and the Noctua NH-L9i-17xx ultimately hinges on your specific requirements. If you need a budget-friendly cooler with robust performance and advanced monitoring features, the Thermalright is an excellent choice. However, if you prioritize a compact design, low noise operation, and brand reliability, the Noctua may justify its higher price tag. Each cooler excels in its own right, making your intended use case the key to making the best choice.

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Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi vs Noctua NH-L9i-17xx | versusfinder