Noctua NF-A14 PWM vs Thermalright Assassin X120 Refined SE CPU Air
Updated July 2026 — Noctua NF-A14 PWM wins on size, Thermalright Assassin X120 Refined SE CPU Air wins on weight and height.
The Noctua NF-A14 PWM excels in quiet performance and aesthetics, while the Thermalright Assassin X120 offers solid cooling at a lower price. Choose based on your priorities.
Why Noctua NF-A14 PWM is better
Noise Level
Noctua operates at 24.6 dB(A) vs Thermalright's 25.6 dB(A)
MTTF
Noctua has a mean time to failure of over 150,000 hours
Design
Noctua features a premium aesthetic design
Why Thermalright Assassin X120 Refined SE CPU Air is better
Price
Thermalright is $17.90 compared to Noctua's $24.95
Compatibility
Thermalright supports more CPU sockets
Cooling Performance
Thermalright's fan can reach 1550 RPM
Overall score
Specifications
| Spec | Noctua NF-A14 PWM | Thermalright Assassin X120 Refined SE CPU Air |
|---|---|---|
| Max RPM | 1500 | 1550 |
| Noise Level | 24.6 dB(A) | 25.6 dB(A) |
| MTTF | >150,000 h | 20,000 h |
| Price | $24.95 | $17.90 |
| Compatibility | Various | Intel/AMD |
Dimension comparison
Overview of the Products
The Noctua NF-A14 PWM is priced at $24.95, while the Thermalright Assassin X120 Refined SE CPU Air Cooler is about 28% cheaper at $17.90. Both products target users looking to improve their cooling solutions, but they cater to different needs: the Noctua focuses on quiet fan performance, while the Thermalright provides comprehensive CPU cooling.
Design and Build Quality
In terms of design, the Noctua NF-A14 PWM features a square frame ideal for various applications, including water cooling radiators and PC cases. Its premium brown finish is well-known among enthusiasts for its aesthetic appeal. The Thermalright Assassin X120, on the other hand, has a more utilitarian design with an aluminum heatsink cover and a compact footprint suitable for medium-sized cases. Both offer solid build quality, but the Noctua is more geared toward those who value aesthetics alongside performance.
Cooling Performance
The Noctua NF-A14 PWM operates at a maximum speed of 1500 RPM and reaches noise levels of just 24.6 dB(A), making it one of the quietest fans available. This is ideal for users who prioritize noise reduction. In contrast, the Thermalright Assassin X120 features a TL-C12C PWM fan that can hit a speed of 1550 RPM with a noise level of up to 25.6 dB(A). While both options are efficient, the Noctua slightly edges out in terms of quieter operation at lower RPMs.
Compatibility
Compatibility is a significant factor when selecting a cooling solution. The Noctua NF-A14 PWM can be used in various setups, including water cooling and case ventilation. The Thermalright Assassin X120 is compatible with a wide range of CPU sockets for both Intel and AMD platforms, including LGA 1150, 1151, 1200, and AM4/AM5. This extensive compatibility makes the Thermalright a versatile choice for users looking to upgrade their CPU cooling without worrying about socket types.
Installation Process
The Noctua NF-A14 PWM comes with anti-vibration mounts, fan screws, and a Low-Noise Adapter, which simplifies installation and helps reduce noise. The Thermalright Assassin X120 is equipped with metal fasteners for both Intel and AMD platforms, ensuring a secure installation. While both products are designed with user-friendly installation in mind, the Noctua offers additional accessories that may make setup easier for novice users.
Price Comparison
When it comes to price, the Noctua NF-A14 PWM is priced at $24.95, while the Thermalright Assassin X120 is available for $17.90. This price difference means that the Thermalright is approximately 28% cheaper than the Noctua. For budget-conscious consumers, the lower price of the Thermalright may be a more attractive option, especially given its solid performance specs.
User Experience and Feedback
The Noctua NF-A14 PWM is often praised for its extremely quiet operation and reliability, boasting a mean time to failure (MTTF) of over 150,000 hours. This long lifespan is a significant advantage for users looking for a low-maintenance solution. The Thermalright Assassin X120 is also well-regarded, particularly for its balance of efficiency and noise levels. Nevertheless, reviews indicate that users who prioritize silence may lean towards the Noctua.
Which should you buy?
Choosing between the Noctua NF-A14 PWM and the Thermalright Assassin X120 will largely depend on your specific needs. The Noctua is ideal for those prioritizing quiet performance and aesthetics, offering advanced features for silent operation. Conversely, the Thermalright Assassin X120 is a more budget-friendly option with versatile CPU compatibility and solid cooling performance. If noise levels and longevity are paramount, the Noctua may be worth the extra investment. However, for users looking for effective cooling at a lower price, the Thermalright stands out as a practical choice.

