Thermalright Assassin X 120R SE V2 CPU Air Cooler vs Noctua NH-U12S
Updated August 2026 — The Thermalright Assassin X 120R SE V2 offers excellent value for budget-conscious users, while the Noctua NH-U12S excels in performance and quiet operation. Choose based on your priorities.
The Thermalright Assassin X 120R SE V2 offers excellent value for budget-conscious users, while the Noctua NH-U12S excels in performance and quiet operation. Choose based on your priorities.
Why Thermalright Assassin X 120R SE V2 CPU Air Cooler is better
price
C$23.59 vs C$79.95
airflow
66.17 CFM airflow
height
148mm height fits medium cases
Why Noctua NH-U12S is better
warranty
6-year warranty
noise level
ultra-quiet operation with Low-Noise Adaptor
brand reputation
renowned for quality and reliability
Overall score
Specifications
| Spec | Thermalright Assassin X 120R SE V2 CPU Air Cooler | Noctua NH-U12S |
|---|---|---|
| Brand | Thermalright | Noctua |
| Current Price | C$23.59 | C$79.95 |
| Fan Speed | 1550 RPM | N/A |
| Cooling Type | Air | Air |
| Installation Ease | Good | Excellent |
Dimension comparison
Overview of the Thermalright Assassin X 120R SE V2 and Noctua NH-U12S
The Thermalright Assassin X 120R SE V2 is priced at C$23.59, while the Noctua NH-U12S is significantly higher at C$79.95. This price difference sets the stage for a comparative analysis of their cooling performance, design, and compatibility features.
The Thermalright Assassin X 120R SE V2 stands out with its PWM fans that provide efficient cooling at a noise level of just 25.6 dB(A). The Noctua NH-U12S, on the other hand, is known for its classic slim-tower design that optimises compatibility with RAM and PCIe slots. Both coolers cater to different segments of users, with Thermalright appealing to budget-conscious consumers and Noctua targeting users who value premium performance.
Cooling Performance
In terms of cooling efficiency, the Thermalright Assassin X 120R SE V2 delivers an impressive airflow of 66.17 CFM, which is crucial for maintaining optimal CPU temperatures during intense workloads. This performance is achieved with a fan speed of 1550 RPM, ensuring efficient heat dissipation without excessive noise.
The Noctua NH-U12S, while also offering excellent cooling, utilises its NF-F12 120mm Focused Flow fan, which is optimised for low-noise operation. Although the specific airflow is not listed, the NH-U12S is designed to ensure effective cooling while remaining quiet, making it a trusted choice for users seeking a balance of performance and noise levels.
Design and Aesthetics
The design of the Thermalright Assassin X 120R SE V2 is practical, with a height of 148mm, making it suitable for medium-sized cases without obstructing RAM installation. Its self-luminous fan adds a visual appeal that some users may appreciate.
Conversely, the Noctua NH-U12S features a classic slim-tower design that ensures compatibility with a wide range of cases without overhanging RAM or PCIe slots. This thoughtful design consideration allows for seamless integration into various builds, enhancing overall aesthetics while maintaining functionality.
Noise Levels
Noise levels are a critical factor for many users, and the Thermalright Assassin X 120R SE V2 operates at a maximum of 25.6 dB(A), which is relatively quiet for a CPU cooler in its price range. This low noise output is particularly advantageous for users who prefer a silent computing environment.
The Noctua NH-U12S, equipped with a Low-Noise Adaptor, is designed for ultra-quiet operation. While specific dB levels are not provided, Noctua is renowned for its quiet fans, making it a solid choice for those prioritising noise reduction in their builds. Users can expect minimal disturbance even under load.
Installation Process
When it comes to installation, the Thermalright Assassin X 120R SE V2 comes with a mounting kit that is compatible with a variety of CPU sockets, including Intel LGA1700 and AMD AM5. The availability of installation videos further simplifies the process, making it accessible for users of all skill levels.
The Noctua NH-U12S also includes a comprehensive SecuFirm2 mounting system, which is compatible with both Intel and AMD sockets. This system is designed for ease of installation, ensuring that users can set up their cooler without hassle. Noctua's inclusion of high-end thermal paste enhances the installation experience, providing users with everything they need for optimal performance.
Compatibility
Compatibility is an essential consideration when choosing a CPU cooler. The Thermalright Assassin X 120R SE V2 supports a wide range of sockets, including Intel LGA1150 through LGA1700 and AMD AM4/AM5, making it versatile for various builds.
Similarly, the Noctua NH-U12S is compatible with both Intel LGA1700, LGA1200, and AMD AM4/AM5 sockets. This broad compatibility allows users to integrate the cooler into a variety of systems without concern, making both options suitable for a wide range of users.
Brand Reputation and Warranty
Thermalright has over 20 years of experience in the computer accessory market, establishing a reputation for quality and reliability. While specific warranty details for the Thermalright Assassin X 120R SE V2 are not provided, the brand's history speaks to its commitment to customer satisfaction.
Noctua, on the other hand, is renowned for its premium quality and offers a generous 6-year manufacturer’s warranty with the NH-U12S. This warranty not only instills confidence in the product's durability but also reflects Noctua's commitment to providing top-notch cooling solutions.
Which should you buy?
Choosing between the Thermalright Assassin X 120R SE V2 and the Noctua NH-U12S largely depends on your budget and specific needs. The Thermalright Assassin X 120R SE V2 is a budget-friendly option that offers impressive cooling performance at a lower price of C$23.59, making it ideal for those looking to save without sacrificing too much quality.
On the other hand, the Noctua NH-U12S, priced at C$79.95, targets users who prioritise noise levels, aesthetics, and brand reliability. With its renowned quality and excellent warranty, it’s a solid investment for those seeking long-term performance. Ultimately, if you want a reliable, budget-friendly cooler, go for the Thermalright. If premium performance and quiet operation are your priorities, the Noctua is the way to go.
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