Noctua NF-A14 PWM vs Thermalright Assassin X 120R SE V2 CPU Cooler, 4×
Updated August 2026 — Noctua NF-A14 PWM wins on design and cooling, Thermalright Assassin X 120R SE V2 CPU Cooler, 4× wins on compatibility.
The Noctua NF-A14 PWM excels in quiet operation and accessories, while the Thermalright Assassin X 120R SE V2 offers great performance at a lower price.
Why Noctua NF-A14 PWM is better
Noise Level
Noctua operates at a quieter maximum of 24.6 dB(A)
Accessories
Includes anti-vibration mounts and Low-Noise Adapter
Build Quality
Advanced acoustic optimization for quieter operation
Why Thermalright Assassin X 120R SE V2 CPU Cooler, 4× is better
Price
Thermalright is priced at $16.59, about 33% cheaper
Airflow
Offers 66.17 CFM airflow for efficient cooling
Compact Design
Smaller dimensions fit more cases
Overall score
Specifications
| Spec | Noctua NF-A14 PWM | Thermalright Assassin X 120R SE V2 CPU Cooler, 4× |
|---|---|---|
| Max Noise | 24.6 dB(A) | 25.6 dB(A) |
| Max RPM | 1500 | 1550 |
| Airflow | N/A | 66.17 CFM |
| PWM Control | Yes | Yes |
| Compatibility | Versatile | Intel & AMD |
Dimension comparison
Overview of the Noctua NF-A14 PWM and the Thermalright Assassin X 120R SE V2
The Noctua NF-A14 PWM is a premium quiet fan designed for various cooling applications, while the Thermalright Assassin X 120R SE V2 is a CPU cooler featuring a high-performance fan. The price difference between the two products is significant, with the Noctua priced at $24.95 and the Thermalright at $16.59, making the latter about 33% cheaper. This price gap may influence buyers depending on their specific cooling needs and budgets.
Design and Build Quality
The Noctua NF-A14 PWM boasts a square frame design that is particularly suitable for water cooling radiators and chassis ventilation. Its construction features advanced acoustic optimization for quieter operation, achieving a maximum noise level of only 24.6 dB(A). On the other hand, the Thermalright Assassin X 120R SE V2 has a more compact design with dimensions of 120x71x148 mm. It is fitted with a pure copper base and four heat pipes, ensuring efficient heat dissipation. Although both products are designed for performance, the Noctua excels in its noise-reduction features, while the Thermalright focuses on effective cooling within a smaller footprint.
Cooling Performance
When it comes to cooling performance, the Noctua NF-A14 PWM can reach a maximum speed of 1500 RPM, while the Thermalright Assassin X 120R SE V2 operates at a slightly higher speed of 1550 RPM. The Noctua fan can handle airflow requirements for various setups, making it versatile for different applications, such as intake and exhaust. In contrast, the Thermalright cooler offers an airflow of 66.17 CFM, which is impressive for a 120mm cooler. The slight speed advantage of the Thermalright may give it an edge in cooling efficiency, but the Noctua’s design prioritizes both airflow and noise reduction, making it a strong contender.
Noise Levels
Noise levels are crucial for users looking for silent operation. The Noctua NF-A14 PWM operates at a maximum of 24.6 dB(A), making it one of the quieter fans available. In comparison, the Thermalright Assassin X 120R SE V2 features a noise level of up to 25.6 dB(A). While the difference is marginal, the Noctua slightly outperforms the Thermalright in noise reduction. For users who prioritize quiet operation, this distinction could be a determining factor in their choice.
Compatibility and Installation
Both products offer significant compatibility across different CPU sockets. The Noctua NF-A14 PWM can be utilized in various applications, including PC cases and cooling radiators, making it versatile for installation. The Thermalright Assassin X 120R SE V2 is specifically designed for Intel and AMD platforms, including LGA1700, AM4, and AM5. It comes equipped with metal fasteners to facilitate easier installation. Thus, while the Noctua offers broader compatibility, the Thermalright is tailored for CPU cooling with a focus on ease of installation.
Features and Accessories
The Noctua NF-A14 PWM includes useful accessories such as anti-vibration mounts, fan screws, and extension cables for running multiple fans, enhancing its value. Additionally, it comes with a Low-Noise Adapter that allows for further speed reduction. The Thermalright Assassin X 120R SE V2, meanwhile, features a self-luminous fan with a common interface for easy lighting setup and a strong focus on durability with its S-FDB bearings. While both products have notable features, the Noctua offers more comprehensive accessories that can enhance the user experience.
Price Comparison
The Noctua NF-A14 PWM is priced at $24.95, whereas the Thermalright Assassin X 120R SE V2 is available for $16.59. This makes the Thermalright about 33% cheaper than the Noctua. For budget-conscious buyers, this price difference could be significant, especially for those who are looking to maximize performance without breaking the bank. However, the Noctua justifies its higher price with premium features and quieter operation.
Which should you buy?
Choosing between the Noctua NF-A14 PWM and the Thermalright Assassin X 120R SE V2 ultimately depends on your specific needs. If you prioritize quiet operation and high-quality accessories, the Noctua is the clear winner. However, if affordability and efficient cooling are your main concerns, the Thermalright offers excellent performance at a lower price point. Both products have their strengths, making them suitable for different types of users.

