Noctua NT-H2 3.5g AM5 Edition vs Thermalright Assassin X120 SE ARGB CPU Air Cooler
Updated August 2026 — The Noctua NT-H2 excels in thermal performance and ease of application, while the Thermalright Assassin X120 SE offers superior cooling capabilities and aesthetic features. Choose based on your specific needs.
The Noctua NT-H2 excels in thermal performance and ease of application, while the Thermalright Assassin X120 SE offers superior cooling capabilities and aesthetic features. Choose based on your specific needs.
Why Noctua NT-H2 3.5g AM5 Edition is better
price
Noctua NT-H2 is cheaper at £12.11
ease of use
No need to spread before installation
brand reputation
Noctua is known for high-quality thermal compounds
Why Thermalright Assassin X120 SE ARGB CPU Air Cooler is better
cooling performance
Thermalright has a maximum airflow of 66.17 CFM
aesthetic features
Thermalright features ARGB lighting
build quality
Thermalright has a robust aluminium heatsink
Overall score
Specifications
| Spec | Noctua NT-H2 3.5g AM5 Edition | Thermalright Assassin X120 SE ARGB CPU Air Cooler |
|---|---|---|
| Price | £12.11 | £16.29 |
| Airflow | N/A | 66.17 CFM |
| Noise Level | N/A | ≤25.6 dB(A) |
| Usage Time | up to 5 years | N/A |
| Applications | 3-20 | N/A |
Dimension comparison
Overview of the Products
In this comparison, we will look at two popular cooling solutions: the Noctua NT-H2 3.5g AM5 Edition and the Thermalright Assassin X120 SE ARGB CPU Air Cooler. The Noctua NT-H2 is priced at £12.11, while the Thermalright Assassin X120 SE comes in at £16.29. Both products are designed to enhance thermal management for CPUs, but they cater to slightly different needs and preferences.
Design and Build Quality
The Noctua NT-H2 is a premium-grade thermal compound, specifically designed for optimal heat transfer from the CPU or GPU to the heatsink. It features the second generation of Noctua’s award-winning NT-H1, ensuring high performance. Moreover, it includes an AM5 edition thermal paste guard that prevents paste build-up, ensuring cleanliness and efficiency.
Conversely, the Thermalright Assassin X120 SE showcases a more comprehensive design as a CPU cooler. It measures 120mm x 71mm x 148mm and weighs 0.63kg. The cooler employs an aluminium heatsink and metal fasteners, providing robust build quality aimed at both Intel and AMD platforms. Its solid construction indicates a focus on durability and compatibility.
Performance and Efficiency
When it comes to performance, the Noctua NT-H2 offers excellent long-term stability, with a recommended usage time of up to five years on the CPU. It allows for approximately three to twenty applications depending on CPU size, making it a versatile choice for various setups.
In comparison, the Thermalright Assassin X120 SE boasts impressive cooling capabilities with a maximum airflow of 66.17 CFM and a noise level of ≤25.6 dB(A). The cooler features a PWM fan that operates at speeds of around 1550 RPM, ensuring efficient cooling while maintaining a relatively quiet operation. This combination of airflow and noise level positions it as an effective cooling solution for both casual and high-performance gaming systems.
Application and Ease of Use
Ease of use is a significant factor for many users. The Noctua NT-H2 is designed for straightforward application without the need for spreading before heatsink installation. This user-friendly approach is complemented by the inclusion of three NA-CW1 cleaning wipes, making post-application clean-up simple.
On the other hand, the Thermalright Assassin X120 SE requires a bit more setup due to its physical installation as a cooler. While it comes with mounting plates and fasteners for various CPU socket platforms, the installation process may require more time and effort compared to applying thermal paste. However, once installed, users can enjoy its robust cooling performance.
Aesthetic Features
Aesthetics play a vital role in many builds, and the Thermalright Assassin X120 SE does not disappoint. It features colourful ARGB lighting effects that can enhance the visual appeal of a gaming rig. This allows users to customise the look of their setup, making it not only functional but also visually striking.
In contrast, the Noctua NT-H2, being a thermal paste, lacks any aesthetic features. Its focus is purely on performance and functionality rather than visual appeal. This might make it less attractive to users who prioritise aesthetics alongside performance.
Brand Reputation and Trustworthiness
Noctua is renowned for its high-quality cooling products, and the NT-H2 is no exception. The brand has built a reputation for producing reliable thermal solutions, and the NT-H2 reflects this trustworthiness with its excellent stability and longevity.
Thermalright, on the other hand, has over 20 years of experience in the industry and has developed a solid reputation, particularly among PC gaming enthusiasts. The product’s specifications and brand history suggest a commitment to quality and innovation, making it a trustworthy choice for consumers.
Price Comparison
The Noctua NT-H2 is priced at £12.11, which positions it as an affordable option for users looking for high-quality thermal paste. Its cost-effectiveness makes it an attractive choice for those on a budget or for those who need to apply thermal paste on multiple CPUs.
The Thermalright Assassin X120 SE is more expensive at £16.29. However, it offers a complete cooling solution that integrates both a heatsink and fan, which justifies the higher price for many users. This investment might be worthwhile for those looking for a long-term cooling solution with added aesthetic features.
Which should you buy?
Choosing between the Noctua NT-H2 and the Thermalright Assassin X120 SE largely depends on your specific needs. If you require a reliable thermal compound with long-lasting performance and ease of application, the Noctua NT-H2 is an excellent choice at £12.11. However, if you are looking for a comprehensive CPU cooling solution with impressive cooling performance and aesthetic appeal, the Thermalright Assassin X120 SE at £16.29 may be the better option. Ultimately, your decision should align with your cooling requirements and budget considerations.
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