Noctua NF-A4x20 PWM vs Thermalright Peerless Assassin 120 SE CPU Air Cooler

Overview of the Noctua NF-A4x20 PWM

The Noctua NF-A4x20 PWM is a premium quiet fan designed specifically for compact spaces. Priced at £18.40, this 40x40x20 mm fan operates at a maximum speed of 5000 RPM, producing a remarkable noise level of just 14.9 dB(A). It is ideal for 1U servers and various networking devices, making it a versatile option for users looking for efficient cooling solutions in tight environments.

With an impressive mean time to failure (MTTF) exceeding 150,000 hours, the Noctua NF-A4x20 PWM promises durability and reliability. Its advanced acoustic optimisation frame and flow acceleration channels are engineered to enhance airflow while minimising noise, making it particularly suitable for applications where silence is paramount.

Overview of the Thermalright Peerless Assassin 120 SE

The Thermalright Peerless Assassin 120 SE CPU Air Cooler is a robust cooling solution priced at £29.99. This cooler features a double tower design and measures 125 mm in length, 135 mm in width, and 155 mm in height, making it a substantial presence within any build. It is equipped with two standard-size PWM fans that operate at a maximum speed of 1550 RPM, generating a noise level of up to 25.6 dB(A).

Designed for compatibility with a wide range of Intel and AMD sockets, the Peerless Assassin employs advanced AGHP technology with six 6 mm heat pipes to improve thermal performance. It can handle a thermal design power (TDP) of 120 to 265 W, making it suitable for high-performance CPUs.

Performance Comparison

In terms of performance, the Noctua NF-A4x20 PWM excels in applications requiring ultra-quiet operation, achieving a maximum speed of 5000 RPM with minimal noise. This makes it an excellent choice for users prioritising a silent environment, as its noise level is significantly lower than that of the Thermalright Peerless Assassin.

Conversely, the Peerless Assassin, with its dual fan setup, offers superior air flow at 66.17 CFM, which is essential for keeping high-performance CPUs cool under heavy loads. While it operates at a lower fan speed of 1550 RPM, its design allows it to manage a higher TDP, making it more suitable for demanding applications.

Installation and Compatibility

The Noctua NF-A4x20 PWM is designed for easy installation in compact setups, particularly in 1U servers or network devices. It includes anti-vibration mounts, fan screws, and a variety of cables for compatibility with proprietary fan headers, ensuring a straightforward installation process.

On the other hand, the Thermalright Peerless Assassin 120 SE provides a comprehensive compatibility package that includes mounting solutions for both Intel and AMD platforms. Its installation process is facilitated by metal fasteners and multiple mounting plates, which are designed for a secure fit. Given its larger size, users need to ensure adequate space in their cases for installation, especially considering its height of 155 mm.

Noise Levels

Noise levels are a critical factor for many users, particularly those building quiet systems. The Noctua NF-A4x20 PWM's maximum noise level of 14.9 dB(A) is exceptionally low, making it one of the quietest fans available. This fan is ideal for environments where noise reduction is crucial, such as home theatres or quiet office spaces.

In comparison, while the Thermalright Peerless Assassin 120 SE is efficient, its maximum noise level of 25.6 dB(A) is nearly double that of the Noctua fan. This increased noise could be a consideration for users who are sensitive to sound, particularly in quieter settings.

Design and Aesthetics

The Noctua NF-A4x20 PWM boasts a sleek and functional design, adhering to Noctua’s signature aesthetic that prioritises performance over flashy appearances. Its compact size allows it to blend seamlessly into various setups without drawing attention.

The Thermalright Peerless Assassin 120 SE, with its double tower design, presents a more substantial and robust appearance. While its design may not appeal to those favouring minimalistic aesthetics, it showcases a commitment to performance with its larger heatsink and dual fans. The overall look may appeal to users who prefer a more industrial or gamer-oriented style.

Price Comparison

When comparing the prices, the Noctua NF-A4x20 PWM is significantly more affordable at £18.40, making it an excellent choice for budget-conscious buyers seeking a reliable fan for compact applications. Its lower price point does not compromise its quality and performance, making it a strong competitor in the market.

The Thermalright Peerless Assassin 120 SE, at £29.99, is priced higher due to its advanced cooling capabilities and compatibility with high TDP CPUs. While it offers more robust cooling performance, users should consider whether the additional features justify the increased cost for their specific needs.

Which should you buy?

Choosing between the Noctua NF-A4x20 PWM and the Thermalright Peerless Assassin 120 SE ultimately depends on your specific cooling needs and environment. If you require a compact, quiet fan for less demanding applications, the Noctua NF-A4x20 PWM is an excellent choice, offering outstanding performance at a lower price. However, if you are looking for a powerful CPU cooler capable of handling high-performance setups with a TDP of up to 265 W, the Thermalright Peerless Assassin 120 SE would be more suitable, albeit at a higher price. Consider your priorities in terms of noise, space, and performance to make the best decision for your build.