Noctua NF-A4x20 PWM vs Thermalright AXP90-X47 Full Low Profile ITX CPU Air Cooler

Overview

When it comes to cooling solutions for computer components, the Noctua NF-A4x20 PWM and the Thermalright AXP90-X47 Full Low Profile ITX CPU Air Cooler present two distinct options for users. The Noctua fan is priced at £18.40, while the Thermalright cooler is available for £41.90. Each product caters to different needs, with the Noctua fan focusing on quiet operation and versatility, while the Thermalright cooler emphasises its low-profile design and efficient heat dissipation for CPUs.

Design and Build Quality

The Noctua NF-A4x20 PWM features a compact design with dimensions of 40x40x20 mm, making it exceptionally suitable for 1U servers and tight spaces in network equipment. Its premium build quality is underscored by its award-winning A-series design, which includes Flow Acceleration Channels for enhanced airflow while maintaining a low noise level of just 14.9 dB(A). In contrast, the Thermalright AXP90-X47 boasts a larger footprint at 94.5×95×47 mm, but still maintains a low profile. Constructed with pure copper and featuring an innovative anti-oxidation protective layer, it ensures durability and effective heat dissipation, even under heavy loads.

Performance

In terms of cooling performance, the Thermalright AXP90-X47 excels with a maximum air volume of 42.58 CFM and a fan speed of 2700 RPM. This allows for effective heat transfer, crucial for CPU operations. The Noctua NF-A4x20, while it may not be a CPU cooler per se, operates at a maximum speed of 5000 RPM and is designed for various applications, providing a maximum airflow suitable for devices like routers and NAS units. Although it achieves a maximum of 14.9 dB(A), which is exceedingly quiet, it is not primarily engineered for CPU cooling.

Noise Levels

Noise is a critical consideration for many users, particularly in quiet environments. The Noctua NF-A4x20 PWM is exceptionally quiet, rated at a mere 14.9 dB(A). This makes it an excellent choice for users who require minimal sound interference, such as in home theatres or office setups. On the other hand, the Thermalright AXP90-X47 operates at 22.4 dB(A) under maximum load, which is noticeably louder but still within an acceptable range for typical computer operations. Users prioritising silence may prefer the Noctua, while those seeking robust cooling might be willing to accept the higher noise level of the Thermalright.

Compatibility

Compatibility is essential for ensuring that cooling solutions fit within existing setups. The Noctua NF-A4x20 PWM is versatile, designed to fit various devices including 1U servers, network equipment, and even DVRs. Its 4-pin PWM connector allows for seamless integration with 4-pin fan headers, enabling automatic speed control. Conversely, the Thermalright AXP90-X47 is explicitly designed for CPU cooling, supporting a wide range of Intel and AMD sockets, including Intel LGA 1700 and AMD AM4/AM5. This makes it an ideal choice for users building or upgrading their CPU cooling solutions.

Ease of Installation

Both products offer user-friendly installation processes, but they cater to different needs. The Noctua NF-A4x20 PWM comes with anti-vibration mounts, fan screws, an extension cable, a Y-cable, and an OmniJoin adaptor set, which facilitates easy connection to various proprietary fan headers. This comprehensive set makes installation straightforward for users with different types of hardware. The Thermalright AXP90-X47, while slightly more complex due to its CPU cooler design, includes a well-constructed installation mechanism that ensures a firm fit on the CPU, although it may require more effort to install correctly compared to the Noctua fan.

Price and Value

The Noctua NF-A4x20 PWM is priced at £18.40, making it an affordable option for those needing a reliable, quiet fan for various applications. In contrast, the Thermalright AXP90-X47 is more expensive at £41.90, reflecting its advanced cooling capabilities and specific design for CPU cooling. While the Noctua offers great value for general use, the Thermalright provides a focused solution for users who need efficient CPU cooling in a compact form factor. The difference in price may influence buyers based on their specific cooling needs and budget constraints.

User Feedback

User feedback often highlights the strengths of both products. The Noctua NF-A4x20 PWM is frequently praised for its exceptional quietness and reliability, particularly in environments where noise is a concern. Users appreciate its versatility and performance in various roles outside of CPU cooling. On the other hand, the Thermalright AXP90-X47 is lauded for its effective cooling performance and compact design, making it a favourite among users building small form factor PCs or HTPCs. However, some users mention its slightly higher noise levels compared to quieter alternatives, suggesting that it may not be ideal for all environments.

Which should you buy?

Choosing between the Noctua NF-A4x20 PWM and the Thermalright AXP90-X47 ultimately depends on your specific needs. If you require a quiet, versatile fan for non-CPU applications, the Noctua at £18.40 is an excellent choice. However, if you're looking for a dedicated CPU cooler that provides robust cooling in a compact package, the Thermalright AXP90-X47 at £41.90 would be the better option. Evaluate your requirements, including noise tolerance, compatibility, and installation ease, to make the best decision for your setup.