Noctua NF-A4x20 FLX fan

Noctua NF-A4x20 FLX — Quiet and Reliable Fan

For users of compact systems looking for efficient cooling without compromising on noise, the Noctua NF-A4x20 FLX is the ideal choice. With dimensions of 40 × 40 × 20 mm, it easily fits even in tight spaces and provides a high static pressure of 2.26 mm H2O, which is key to efficient airflow over dense heatsinks or obstacles. SSO2 bearings ensure a long lifespan and consistent performance even under heavy use. In addition, with a noise level of just 19.6 dB(A) at maximum speed, the fan remains extremely quiet.

Flexible speed control for different needs

The Noctua NF-A4x20 FLX supports two speed levels: 5000 rpm for maximum performance and 4400 rpm when using the L.N.A. adapter. (Low-Noise Adapter) for quieter operation. This flexibility allows you to tailor the fan to your specific system requirements — ideal for both CPU cooling and silent systems with minimal interference.

Performance optimization and reliability

The fan is equipped with technologies such as AAO (Advanced Acoustic Optimization) frame and Flow Acceleration Channels, which improve aerodynamics and reduce unwanted turbulence. SSO2 bearings not only increase the fan's lifespan, but also ensure smooth operation with minimal maintenance. These design improvements make the Noctua NF-A4x20 FLX a reliable partner for long-term use.

Technical details and compatibility

• Voltage: 12 V
• Connector: 3-pin
• Airflow: 9.4 m³/h
• Color: brown

The fan comes with a wide range of accessories, including adapters and anti-vibration mounting elements, ensuring compatibility with various types of systems. In addition, the OmniJoin™ kit allows for easy connection even in cases where connector modification is required.

Package contents

• L.N.A. (Low-Noise Adapter)
• NA-AC2 adapter
• OmniJoin™ kit
• Extension cable
• Anti-vibration mounts
• Mounting screws