Noctua NF-A4x20 PWM vs be quiet! Dark Rock Pro 5 Air CPU Cooler

Overview of the Fans

The Noctua NF-A4x20 PWM is a compact fan designed for quiet operation, while the be quiet! Dark Rock Pro 5 Air CPU Cooler is a high-performance cooler aimed at enthusiasts. The NF-A4x20 PWM is priced at £18.40, making it an affordable option for those needing a small fan for specific applications. In contrast, the Dark Rock Pro 5 is significantly more expensive at £75.99, reflecting its advanced cooling capabilities and features aimed at overclocked systems.

Design and Build Quality

The Noctua NF-A4x20 PWM boasts a premium design with a focus on quiet operation. It incorporates Flow Acceleration Channels and an Advanced Acoustic Optimisation frame, ensuring superior performance while maintaining a noise level of just 14.9 dB(A). Conversely, the Dark Rock Pro 5 features a robust build with seven high-performance copper heat pipes and a special black coating with ceramic particles, which not only enhances durability but also improves thermal performance. Its design is distinguished by a detachable mesh top cover that integrates a middle fan for optimal airflow.

Cooling Performance

In terms of cooling performance, the Noctua NF-A4x20 PWM operates at a maximum speed of 5000 RPM, making it suitable for various applications, including 1U servers and network devices. However, its cooling capacity is tailored for smaller setups. On the other hand, the Dark Rock Pro 5 is designed for high-performance CPUs, with its two Silent Wings PWM fans capable of reaching up to 2000 RPM in Performance Mode. This makes it ideal for overclocked systems, where maintaining low temperatures is crucial. The Dark Rock Pro 5 excels in scenarios where high thermal loads are present.

Noise Levels

Noise levels are a critical factor for any cooling solution. The Noctua NF-A4x20 PWM operates at a remarkably quiet 14.9 dB(A), making it an excellent choice for noise-sensitive environments. Its low RPM and advanced design contribute to its whisper-quiet operation. In comparison, the Dark Rock Pro 5 offers two operational modes that affect noise output. In Quiet Mode, it runs at a maximum of 1500 RPM, which is still relatively quiet but higher than the NF-A4x20 PWM. In Performance Mode, the noise levels may increase as the fans can spin up to 2000 RPM, but the design mitigates turbulence and maintains a balanced noise profile.

Application Versatility

The Noctua NF-A4x20 PWM is highly versatile due to its compact 40x40x20 mm size, making it ideal for fitting into tight spaces such as 1U servers, routers, and NAS devices. This flexibility allows it to replace existing fans in various applications where space is limited. In contrast, the Dark Rock Pro 5 is specifically designed for CPU cooling, making it less versatile in terms of application. Its size and design are optimised for high-performance desktop systems, particularly those that require effective cooling during intense tasks.

Installation Process

Installation is straightforward for both products, but they cater to different user needs. The Noctua NF-A4x20 PWM comes with anti-vibration mounts, fan screws, an extension cable, y-cable, and an OmniJoin adaptor set, facilitating easy connectivity to proprietary fan headers. This is particularly beneficial for users replacing fans in existing setups. Meanwhile, the Dark Rock Pro 5 features a simple and elegant installation concept, with a black mounting kit that matches its design. The detachable mesh top cover adds convenience, allowing for easy access during installation or maintenance.

Price Comparison

When it comes to price, the Noctua NF-A4x20 PWM is an affordable option at £18.40, making it an excellent choice for budget-conscious consumers looking for a reliable fan. In contrast, the Dark Rock Pro 5 is priced at £75.99, reflecting its advanced cooling technology and build quality. This price difference indicates that while the NF-A4x20 PWM is suitable for basic applications, the Dark Rock Pro 5 is intended for users seeking high-performance cooling solutions, particularly for overclocked CPUs.

Which should you buy?

Choosing between the Noctua NF-A4x20 PWM and the be quiet! Dark Rock Pro 5 ultimately depends on your specific needs. If you require a compact, quiet fan for smaller devices or servers, the Noctua NF-A4x20 PWM is the better choice due to its affordability and versatility. However, if you are an enthusiast looking for a high-performance CPU cooler capable of handling significant thermal loads, the Dark Rock Pro 5 is worth the investment for its superior cooling capabilities and advanced features.