Noctua NF-A14 PWM vs Thermalright Assassin Spirit 120 EVO Dark CPU Cooler Air with 4×6mm HeatPipes
Updated August 2026 — The Noctua NF-A14 PWM excels in quiet operation and premium performance, while the Thermalright Assassin Spirit 120 EVO Dark offers great value for budget-conscious users.
The Noctua NF-A14 PWM excels in quiet operation and premium performance, while the Thermalright Assassin Spirit 120 EVO Dark offers great value for budget-conscious users.
Why Noctua NF-A14 PWM is better
quiet operation
Noctua operates at 24.6 dB(A)
premium design
Noctua features a square frame for versatile applications
long lifespan
Noctua has >150,000 h MTTF
Why Thermalright Assassin Spirit 120 EVO Dark CPU Cooler Air with 4×6mm HeatPipes is better
lower price
Thermalright costs C$24.90
higher RPM
Thermalright can reach 1850 RPM
wide compatibility
Thermalright supports various Intel and AMD sockets
Overall score
Specifications
| Spec | Noctua NF-A14 PWM | Thermalright Assassin Spirit 120 EVO Dark CPU Cooler Air with 4×6mm HeatPipes |
|---|---|---|
| Max RPM | 1500 | 1850 |
| Noise Level | 24.6 dB(A) | N/A |
| PWM Control | Yes | Yes |
| Material | Plastic | Aluminium |
| MTTF | >150,000 h | N/A |
Dimension comparison
Overview of the Products
The Noctua NF-A14 PWM and the Thermalright Assassin Spirit 120 EVO Dark CPU Cooler are both prominent options in the CPU cooling fan market, catering to different user needs and preferences. The Noctua is positioned at a higher price point of C$34.95, while the Thermalright offers a more budget-friendly option at C$24.90. This article will delve into their features, performance, and overall value to help you determine which cooler is the best fit for your setup.
Design and Build Quality
The Noctua NF-A14 PWM features a premium design with a square frame that measures 140x140x25 mm. This design is particularly advantageous for various cooling applications, including water cooling radiators and PC cases. On the other hand, the Thermalright Assassin Spirit 120 EVO Dark boasts a more compact design at 120mm in length, 73mm in width, and 156mm in height. Its all-aluminium fins are designed to enhance heat dissipation, making it a solid contender for those with limited space. The choice between these two designs depends largely on your case size and cooling requirements.
Cooling Performance
In terms of cooling efficiency, the Noctua NF-A14 PWM operates at a maximum speed of 1500 RPM, achieving a noise level of 24.6 dB(A). This makes it a quiet performer, ideal for users who prioritise low noise in their builds. In contrast, the Thermalright Assassin Spirit 120 EVO Dark can reach a maximum rotation speed of 1850 RPM, which potentially offers better cooling performance, especially under heavy loads. However, this can come at the cost of increased noise levels, although specific dB ratings were not provided for this model.
Installation and Compatibility
Both coolers come with user-friendly installation processes, but they cater to different motherboard socket types. The Noctua NF-A14 PWM includes anti-vibration mounts and various cables for easy setup. It is versatile enough for a range of applications, thanks to its PWM functionality. The Thermalright Assassin Spirit 120 EVO Dark supports a wide array of Intel and AMD sockets, including LGA 1700 and AM5, making it highly compatible with modern systems. This aspect is crucial for users who may want a cooler that can be reused in future builds.
Noise Levels
Noise levels are a critical factor when choosing a CPU cooler, particularly for users who either work in quiet environments or enjoy gaming without distractions. The Noctua NF-A14 PWM operates at a maximum noise level of only 24.6 dB(A), which is exceptionally quiet. In contrast, while the Thermalright Assassin Spirit 120 EVO Dark is designed to operate quietly as well, specific noise level metrics are not provided. However, given its higher maximum RPM, it may produce more noise under load, which could be a consideration for noise-sensitive users.
Price and Value
With a current price of C$34.95, the Noctua NF-A14 PWM is positioned as a premium offering. Its high-quality design and quiet operation justify the price for users who demand top-notch performance. The Thermalright Assassin Spirit 120 EVO Dark, at C$24.90, presents a compelling value proposition for those looking for effective cooling without breaking the bank. While the Noctua may be the go-to option for enthusiasts, the Thermalright offers excellent performance and features that are attractive to budget-conscious buyers.
Additional Features
The Noctua NF-A14 PWM comes with several additional features that enhance its usability, including a low-noise adapter for reduced RPM and anti-vibration mounts. These features contribute to its reputation as a quiet and efficient fan. The Thermalright Assassin Spirit 120 EVO Dark also boasts notable features, including a PWM temperature control function that automatically adjusts fan speed based on thermal demands. This can improve cooling efficiency while minimising noise, making it a well-rounded option for various builds.
User Experience and Feedback
User experiences generally lean towards the Noctua NF-A14 PWM for its reliability and quiet operation. Many users report that it significantly lowers CPU temperatures while maintaining a near-silent presence in the case. The Thermalright Assassin Spirit 120 EVO Dark has also received positive feedback, particularly for its cooling capability and ease of installation. However, some users have noted that it may not be as quiet as the Noctua, especially under heavy loads. Ultimately, user experiences highlight the strengths and weaknesses of each cooler, which can guide potential buyers in their decision.
Which should you buy?
Choosing between the Noctua NF-A14 PWM and the Thermalright Assassin Spirit 120 EVO Dark largely depends on your specific needs and budget. If you prioritise quiet operation and premium performance, the Noctua's higher price tag may be justified. However, if you are looking for a cost-effective solution that still offers excellent cooling capabilities, the Thermalright is a solid choice. Both coolers have their unique advantages, so carefully consider your requirements before making a final decision.
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