Noctua NF-A14x25 G2 PWM Chromax Fan Black

The Noctua NF-A14x25 G2 PWM Chromax Fan features a 140x140x25mm form-factor and delivers up to 155.6 m/h airflow and 2.56mm H2O static pressure at 0–1500 rpm, offering strong cooling performance for both case ventilation and radiator setups. Its Progressive Bend impeller with ultra-tight 0.7mm tip clearance plus SupraTorque motor design ensure excellent performance-to-noise efficiency while remaining quiet (max 24.8 dB(A)). The all-black chroma black frame includes anti-vibration pads, a 4-pin PWM connector for full fan-speed control, and Noctua’s premium-grade SSO2 bearing rated for 150 000 h making it ideal for stealthy, long-lasting builds.

Features

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NF-A14x25 G2 PWM Chromax.Black

State-of-the-art quiet cooling performance for PC cases and water cooling radiators in a sleek all-black design: The chromax.black version of the award-winning NF-A14x25 G2 140mm fan.

Succeeding the iconic NF-A14, the NF-A14x25 G2 has quickly established itself as a new benchmark for premium quality quiet 140x25mm fans.

Its advanced aerodynamic engineering featuring a novel Progressive Bend impeller design with a Centrifugal Turbulator hub, winglets, and a record tight tip clearance of only 0.7mm enables the G2 model to provide a significant boost in performance-to-noise efficiency over its renowned predecessor: Whether it’s in low-impedance, airflow-orientated applications such as case cooling, or high-impedance, pressure-demanding scenarios such as on water cooling radiators, where its etaPERF motor with SupraTorque allows leveraging extra torque headroom, the NF-A14x25 G2 is a proven winner.

The chromax.black edition combines the NF-A14x25 G2’s Sterrox liquid-crystal polymer impeller, comprehensive feature set and breakthrough quiet cooling proficiency with an attractive black design that can be customised with coloured anti-vibration pads that are available separately.

Topped off with Noctua’s trusted premium-grade SSO2 bearing, an MTTF of more than 150,000 hours and a 6-year manufacturer’s warranty, the NF-A14x25 G2 PWM chromax.black is the perfect choice for users who are looking for cutting-edge quality, quietness and performance in an all-black style.

• Next-gen 14cm design - For unprecedented quiet cooling performance
• State-of-the-art engineering - Progressive Bend impeller, Sterrox® LCP material & ultra tight tip clearance
• Chromax.black edition - All-black design, customisable with optional anti-vibration pads

Award-Winning NF-A14x25 G2 Design

Providing a significant performance boost over the renowned first-generation NF-A14, the NF-A14x25 G2 has become a new favourite among quiet cooling enthusiasts. With rave reviews and dozens of awards from hardware media around the world, the G2 model is a proven premium choice for the highest demands.

Chromax. Black Edition

From the impeller and fan frame to the anti-vibration pads, anti-vibration gasket, anti-vibration mounts, screws and cables, the chromax.black edition is black from head to toe, making it easy to integrate into all-black PC builds and various other environments.

Supra Torque™

Most fans become slightly slower when working against back pressure such as on heatsinks and radiators, which results in reduced performance. Enabled by the new NA-FD6 driver IC, Noctua's SupraTorque™ technology allows the fan to leverage additional torque headroom when required in order to keep its RPM speed at the desired level no matter the airflow resistance, ensuring consistent performance even in the most demanding conditions.

Ultra-Tight Tip Clearance

The NF-A14x25 G2 has a record tight tip clearance (distance between the blade tips and the inside of the frame) of only 0.7mm. This highly ambitious design sets a new benchmark for 140mm fans and helps the NF-A14x25 G2 to work more efficiently against back pressure, such as on heatsinks or radiators, by reducing leak flows through the gap between impeller and frame.

Colour-Customisable with Optional Accessories

The chromax.black edition can be colour-customised by replacing the four black NA-AVP1 anti-vibration pads on the inlet side with other colours that are available separately (e.g. white, grey, brown or red). For additional customisation, Noctua’s chromax line also comprises cables and anti-vibration mounts in various colours.

Highly Optimised P/Q Curve for All Applications

The NF-A14x25 G2’s sophisticated aerodynamic design allows for a pressure to airflow (P/Q) curve that is extremely strong in the critical mid-section. This means that the NF-A14x25 G2 is a true jack-of-all-trades with excellent performance in both static pressure and airflow demanding applications.

Excellent On-Application Acoustics

While many fans produce unpleasant, high-pitched noises when installed in typical applications such as on heatsinks or radiators, the NF-A14x25 G2 has been carefully fine-tuned for optimal on-application acoustics. It produces a smooth, pleasant frequency profile and surprisingly low sound pressure levels (SPL) when working against back pressure.

Progressive Bend Impeller

The NF-A14x25 G2 features a unique Progressive-Bend impeller with Flow Acceleration Channels and winglets. Its nine blades are swept backwards close to the hub and progressively bent forward further out. Working in tandem with the Centrifugal Turbulator hub, this design not only helps to push more air towards the outer blade areas where efficiency is higher but also assures maximum lift and near uniform loading across the entire blade span.

Centrifugal Turbulator Hub

Acting as a turbulator, the new Centrifugal Turbulator hub design improves flow attachment in the hub region. At the same time, its centrifugal driving motion pushes air outwards from the hub area where efficiency is low due to the slow rotational speed towards the outer, high-efficiency zones of the blades, thereby increasing overall efficiency by optimising fluid distribution across the impeller area.

Flow Acceleration Channels

The NF-A14x25 G2 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.

Winglets

Winglets can help to reduce tip vortices that are caused by the pressure differential between the suction and the pressure side of fan blades but bear the risk of reducing efficiency due to extra fluid displacement in high velocity regions. The NF-A14x25 G2’s small winglets have been carefully fine-tuned to provide consistent efficiency gains working in tandem with its Progressive-Bend blade geometry, Flow Acceleration Channels and AAO frame.

Sterrox® Liquid-Crystal Polymer Compound

The NF-A14x25 G2’s impeller is made from Noctua’s novel Sterrox® liquid-crystal polymer (LCP) compound that features extreme tensile strength, an exceptionally low thermal expansion coeffic