Noctua NF-A4x20 PWM vs CORSAIR RS120-R ARGB 120mm PWM Reverse Flow Fan - +5V ARGB Connections
Updated August 2026 — The Noctua NF-A4x20 PWM is the better choice for quiet operation and compact compatibility, while the CORSAIR RS120-R ARGB excels in aesthetics and airflow.
The Noctua NF-A4x20 PWM is the better choice for quiet operation and compact compatibility, while the CORSAIR RS120-R ARGB excels in aesthetics and airflow.
Why Noctua NF-A4x20 PWM is better
price
Noctua is £6.59 cheaper
noise level
Noctua operates at 14.9 dB(A)
compatibility
Noctua is ideal for 1U servers
Why CORSAIR RS120-R ARGB 120mm PWM Reverse Flow Fan - +5V ARGB Connections is better
aesthetics
CORSAIR has vibrant ARGB lighting
airflow
CORSAIR provides 65.8 CFM airflow
static pressure
CORSAIR has 2.81 mm H2O static pressure
Overall score
Specifications
| Spec | Noctua NF-A4x20 PWM | CORSAIR RS120-R ARGB 120mm PWM Reverse Flow Fan - +5V ARGB Connections |
|---|---|---|
| Brand | Noctua | Corsair |
| Fan Type | PWM | PWM |
| ARGB | No | Yes |
| PWM Control | Yes | Yes |
| Accessories | Yes | No |
Dimension comparison
Price Comparison
When comparing the prices of the Noctua NF-A4x20 PWM and the CORSAIR RS120-R ARGB fan, the Noctua model is the more budget-friendly option at £18.40, while the CORSAIR fan is priced at £24.99. This represents a difference of £6.59, making the Noctua fan approximately 26% cheaper than its competitor. For consumers focused on cost, the Noctua NF-A4x20 PWM offers a more economical choice without compromising on essential features, particularly for those seeking a reliable fan for 1U servers and similar devices.
Design and Aesthetics
In terms of design, the CORSAIR RS120-R ARGB stands out with its vibrant and customisable ARGB lighting, featuring eight LEDs per fan that enhance the visual appeal of any PC build. This fan is designed to be aesthetically pleasing, especially when mounted as an intake, thanks to its reverse rotor design. On the other hand, the Noctua NF-A4x20 PWM focuses on functional design, prioritising quiet performance and compatibility with various devices like routers and NAS systems. While the Noctua offers a more understated look, the CORSAIR’s lighting effects cater to gamers and PC enthusiasts who value visual flair in their setups.
Performance and Airflow
The CORSAIR RS120-R ARGB offers a maximum speed of up to 2,100 RPM and provides a substantial airflow of 65.8 CFM, making it a solid choice for cooling demanding systems. In contrast, the Noctua NF-A4x20 PWM delivers a maximum speed of 5,000 RPM, but with a lower airflow than the CORSAIR, making it ideal for quieter applications rather than high-volume airflow needs. The Noctua fan operates at a maximum noise level of 14.9 dB(A), significantly quieter than many competitors, while the CORSAIR may be less silent at higher speeds. Users must consider whether they prioritise maximum airflow or minimal noise during operation.
Compatibility
Compatibility is a vital factor for fans, and the Noctua NF-A4x20 PWM is specifically designed for 40x40x20 mm applications, making it ideal for 1U servers and compact devices. It includes an assortment of accessories such as anti-vibration mounts and an OmniJoin adaptor set to connect to various proprietary fan headers. Meanwhile, the CORSAIR RS120-R ARGB is a 120 mm fan with a standard PWM connection, making it suitable for typical PC cases. However, its reliance on a compatible motherboard for ARGB control may limit its versatility compared to the more universally adaptable Noctua fan.
Noise Levels
Noise levels are crucial for users prioritising a quiet computing experience. The Noctua NF-A4x20 PWM operates at a maximum of 14.9 dB(A), which is exceptionally quiet and ideal for environments where minimal noise is essential, such as home offices or media centres. Conversely, while the CORSAIR RS120-R ARGB does not explicitly state its noise levels, fans running at up to 2,100 RPM may produce more sound, especially under load. Therefore, the Noctua clearly excels in quieter operation, making it preferable for noise-sensitive applications.
Features and Accessories
The Noctua NF-A4x20 PWM comes with a comprehensive package that includes anti-vibration mounts, fan screws, an extension cable, a y-cable, and an OmniJoin adaptor set. This ensures a hassle-free installation and compatibility with various setups. In contrast, the CORSAIR RS120-R ARGB focuses on aesthetics with its ARGB lighting but does not mention any additional accessories included in the package. For users looking for a complete solution out of the box, the Noctua provides more value with its thoughtful inclusions, enhancing the overall user experience.
Target Audience
The two fans cater to different target audiences. The Noctua NF-A4x20 PWM is aimed at users needing a compact, quiet fan for server and networking equipment, while the CORSAIR RS120-R ARGB is designed for gamers and PC builders who appreciate aesthetic enhancements and require moderate cooling performance. Therefore, the choice largely depends on whether one prioritises functionality and noise reduction, as seen with the Noctua, or visual appeal and airflow capability, as found in the CORSAIR model.
Which should you buy?
Ultimately, the decision between the Noctua NF-A4x20 PWM and the CORSAIR RS120-R ARGB hinges on individual needs and preferences. If price, noise levels, and compatibility with smaller devices are your main concerns, the Noctua fan is the best choice at £18.40. However, if you are looking for a visually striking fan with decent airflow for a gaming setup and are willing to pay a premium of £24.99, the CORSAIR RS120-R ARGB could be the ideal option. Each fan has distinct strengths that cater to different user requirements, making the final choice a matter of personal preference.
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