Noctua NF-A4x10 PWM vs TR-Assassin X 120R SE V2 CPU Air Cooler
Updated August 2026 — The Noctua NF-A4x10 PWM excels in quiet operation and compact design, while the TR-Assassin X 120R SE V2 offers better cooling performance for standard builds. Choose based on your specific needs.
The Noctua NF-A4x10 PWM excels in quiet operation and compact design, while the TR-Assassin X 120R SE V2 offers better cooling performance for standard builds. Choose based on your specific needs.
Why Noctua NF-A4x10 PWM is better
Noise Level
Noctua operates at 19.6 dB(A) vs TR's 25.6 dB(A)
Size
Noctua's compact 40x40x10 mm design is ideal for small spaces
MTTF
Noctua has >150,000 hours MTTF compared to TR's unspecified
Why TR-Assassin X 120R SE V2 CPU Air Cooler is better
Airflow
TR provides 66.17 CFM airflow vs Noctua's lower performance
Price
TR is more affordable at £14.49 compared to Noctua's £18.98
Compatibility
TR supports more CPU sockets including AM4/AM5
Overall score
Specifications
| Spec | Noctua NF-A4x10 PWM | TR-Assassin X 120R SE V2 CPU Air Cooler |
|---|---|---|
| Max Noise | 19.6 dB(A) | 25.6 dB(A) |
| Max RPM | 5000 | 1550 |
| Airflow | N/A | 66.17 CFM |
| Price | £18.98 | £14.49 |
| MTTF | 150000 | — |
Dimension comparison
Overview of the Noctua NF-A4x10 PWM and TR-Assassin X 120R SE V2 CPU Air Cooler
When comparing the Noctua NF-A4x10 PWM and the TR-Assassin X 120R SE V2 CPU Air Cooler, it is clear that they serve different cooling needs and environments. The Noctua NF-A4x10 PWM is a compact fan designed for specific applications, while the TR-Assassin X 120R SE V2 is a full-sized CPU cooler aimed at providing robust performance in standard PC builds. At £18.98, the Noctua is positioned as a premium quiet fan, whereas the TR-Assassin X is priced at £14.49, offering a balance between performance and affordability.
Design and Build Quality
The design and build quality of the Noctua NF-A4x10 PWM reflect its premium positioning, featuring a 40x40x10 mm frame and advanced acoustic optimisation. This makes it ideal for scenarios where space is limited, such as in 1U servers and network devices. In contrast, the TR-Assassin X 120R SE V2 measures 120x71x148 mm, making it a larger option designed for more standard ATX case installations. Its heatsink is constructed from aluminum and copper, promising efficient heat dissipation. This difference in size and materials highlights the Noctua's focus on compact, quiet operation, while the TR-Assassin X aims for powerful cooling performance in a larger format.
Cooling Performance
The Noctua NF-A4x10 PWM boasts a maximum speed of 5000 RPM, achieving a sound level of just 19.6 dB(A) at full speed, making it an excellent choice for quiet environments. Its design includes Flow Acceleration Channels, which enhance its cooling efficiency. On the other hand, the TR-Assassin X 120R SE V2 features a 120 mm fan with a maximum speed of 1550 RPM and a rated airflow of 66.17 CFM. While the TR-Assassin X operates at a higher noise level of up to 25.6 dB(A), it is built to handle more intense cooling needs, particularly for high-performance CPUs. This comparison illustrates how the Noctua prioritises silent operation, while the TR-Assassin X is geared towards delivering substantial airflow.
Compatibility and Installation
The Noctua NF-A4x10 PWM is versatile, particularly suitable for 1U server applications or as a replacement in network equipment due to its compact size. It includes various mounting accessories like anti-vibration mounts and an OmniJoin adaptor for connecting to different fan headers. Conversely, the TR-Assassin X 120R SE V2 is designed for broader motherboard compatibility, supporting Intel's LGA series and AMD's AM4/AM5 sockets. However, it requires the original backplate for AM4 and AM5 installations, which may complicate setup for some users. This indicates that while the Noctua excels in specific scenarios, the TR-Assassin X offers a more general-purpose solution for typical desktop builds.
Noise Levels
A significant factor in cooling solutions is the noise level they produce during operation. The Noctua NF-A4x10 PWM operates at a maximum of 19.6 dB(A), which is exceptionally quiet, making it ideal for users who prioritise a silent computing experience. The TR-Assassin X 120R SE V2, with a maximum noise level of 25.6 dB(A), is still relatively quiet but does not match the stealth of the Noctua. This noise difference is crucial for users in noise-sensitive environments, such as offices or home theatres, where quiet operation is essential.
Price Comparison
The Noctua NF-A4x10 PWM is priced at £18.98, reflecting its premium features and quiet operation suitable for specialised applications. In contrast, the TR-Assassin X 120R SE V2 is more affordable at £14.49, making it an attractive option for budget-conscious consumers looking for effective cooling in standard PC builds. This pricing strategy outlines the Noctua's focus on niche markets, while the TR-Assassin X aims to appeal to a broader audience without compromising too much on performance.
Target Audience
The Noctua NF-A4x10 PWM is tailored for users who need a reliable, quiet fan for compact systems or specific applications like network equipment and storage solutions. Its premium features cater to individuals who value silence and efficiency over sheer airflow. On the other hand, the TR-Assassin X 120R SE V2 targets PC builders and gamers who require a powerful CPU cooler that can handle high-performance tasks while fitting into standard case dimensions. Each product, therefore, addresses different segments of the cooling market based on user needs and system requirements.
Which should you buy?
Choosing between the Noctua NF-A4x10 PWM and the TR-Assassin X 120R SE V2 ultimately hinges on your specific cooling requirements. If you need a compact, quiet fan for specialised applications or small systems, the Noctua is an excellent investment at £18.98. However, if you're building a standard desktop PC and require a capable CPU cooler that balances performance and price, the TR-Assassin X at £14.49 is likely the better choice. Each product excels in its domain, making the decision dependent on your particular use case and system configuration.
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