Noctua NF-A4x20 PWM vs ARCTIC Liquid Freezer III Pro 360 A-RGB - AIO CPU Cooler
Updated August 2026 — The ARCTIC Liquid Freezer III Pro 360 A-RGB offers superior cooling performance and features, making it the better choice for high-performance systems. The Noctua NF-A4x20 PWM is ideal for compact and quiet applications.
The ARCTIC Liquid Freezer III Pro 360 A-RGB offers superior cooling performance and features, making it the better choice for high-performance systems. The Noctua NF-A4x20 PWM is ideal for compact and quiet applications.
Why Noctua NF-A4x20 PWM is better
price
Noctua is significantly cheaper at £18.40
noise
Noctua operates at a maximum of 14.9 dB(A)
size
Noctua's compact design fits in tight spaces
Why ARCTIC Liquid Freezer III Pro 360 A-RGB - AIO CPU Cooler is better
cooling
ARCTIC is designed for high-load scenarios
features
ARCTIC includes integrated VRM fan for better performance
compatibility
ARCTIC supports both Intel and AMD processors
Overall score
Specifications
| Spec | Noctua NF-A4x20 PWM | ARCTIC Liquid Freezer III Pro 360 A-RGB - AIO CPU Cooler |
|---|---|---|
| Brand | Noctua | ARCTIC |
| Type | Fan | AIO Cooler |
| Max Load | Low | High |
| PWM Control | Yes | Yes |
| MTTF | >150,000 h | Not specified |
Dimension comparison
Price Comparison
When it comes to pricing, the Noctua NF-A4x20 PWM is significantly more affordable than the ARCTIC Liquid Freezer III Pro 360 A-RGB. The Noctua fan is priced at £18.40, while the ARCTIC cooler retails for £74.99. This represents a difference of £56.59, making the Noctua a budget-friendly option, particularly for users looking for a simple yet effective cooling solution. While the Noctua is designed for specific applications such as 1U servers and network equipment, the ARCTIC caters to a broader market with its advanced cooling technology. The price difference reflects the varying complexities and capabilities of these cooling products.
Design and Build Quality
The design of the Noctua NF-A4x20 PWM focuses on compactness and efficiency, making it ideal for tight spaces. It measures 40x40x20 mm, which allows it to fit into devices like routers and NAS systems seamlessly. On the other hand, the ARCTIC Liquid Freezer III Pro 360 A-RGB features a larger form factor, indicative of its AIO (All-In-One) design, making it suitable for high-performance CPU cooling. The ARCTIC also boasts a visually appealing A-RGB feature, which adds an aesthetic element to a build, while the Noctua design prioritises function over form, ensuring robust performance in constrained environments.
Cooling Performance
In terms of cooling performance, the ARCTIC Liquid Freezer III Pro 360 A-RGB is engineered for high-load scenarios, featuring the P12 PRO FAN, which is touted to deliver more power at any speed compared to its predecessors. This cooler can handle significant thermal loads, making it ideal for overclocked CPUs. The Noctua NF-A4x20 PWM, while excellent for its size, operates at a maximum speed of 5000 RPM and is designed for quieter applications with a maximum noise level of just 14.9 dB(A). While both products excel in their respective domains, the ARCTIC clearly stands out in scenarios requiring substantial cooling capability.
Noise Levels
When it comes to noise levels, the Noctua NF-A4x20 PWM is exceptionally quiet, rated at a maximum of 14.9 dB(A). This makes it an excellent choice for environments where noise is a concern, such as home offices or media servers. Conversely, the ARCTIC Liquid Freezer III Pro 360 A-RGB, while efficient, does not specify a maximum noise level in the provided data. However, the P12 PRO FAN is known for being quieter at low speeds compared to its predecessors, implying it may also perform well in noise-sensitive situations. Regardless, users prioritising silence might lean towards the Noctua fan.
Application Scope
The application scope of the Noctua NF-A4x20 PWM is primarily targeted towards specific use cases like 1U servers, routers, and NAS systems, where space constraints are a significant consideration. This compact fan is tailored for environments needing reliable, quiet cooling without the bulk of larger solutions. On the other hand, the ARCTIC Liquid Freezer III Pro 360 A-RGB is designed for mainstream desktop CPUs, offering robust cooling for gaming and high-performance tasks. Its compatibility with both Intel and AMD systems widens its appeal, making it suitable for various builds, from gaming rigs to professional workstations.
Installation and Compatibility
Installation ease is a notable factor when comparing these two cooling solutions. The Noctua NF-A4x20 PWM comes with anti-vibration mounts, fan screws, and extension cables, making integration into existing systems straightforward, particularly for older or smaller setups. In contrast, the ARCTIC Liquid Freezer III Pro 360 A-RGB features native offset mounting for both Intel and AMD processors, ensuring optimal contact and heat transfer. Its integrated cable management also simplifies installation by reducing cable clutter. While both products offer user-friendly installation, the ARCTIC provides an edge in terms of modern compatibility and aesthetics.
Features and Technology
The Noctua NF-A4x20 PWM incorporates advanced acoustic optimisation features and Flow Acceleration Channels, which enhance its quiet operation and cooling efficiency despite its smaller size. It also includes a Low-Noise Adapter, allowing users to reduce the maximum speed to 4400 RPM if desired. In contrast, the ARCTIC Liquid Freezer III Pro 360 A-RGB showcases a more advanced cooling technology with an integrated VRM fan that helps maintain voltage converter temperatures, ensuring reliable performance during intense workloads. This reflects a more sophisticated approach to cooling, tailored for high-performance applications.
Which should you buy?
Choosing between the Noctua NF-A4x20 PWM and the ARCTIC Liquid Freezer III Pro 360 A-RGB depends largely on your specific needs. If you're looking for an affordable, compact cooling solution for smaller systems or low-noise environments, the Noctua is an excellent choice at £18.40. However, if you require superior cooling performance for a high-powered CPU, especially in gaming or intensive tasks, the ARCTIC's advanced technology and features at £74.99 make it the better option. Ultimately, the decision should be based on your system requirements and budget constraints.
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