
NF-A14x25r G2 PWM
Next-gen 140mm fan
Next-gen 14cm design
For unprecedented quiet cooling performance
State-of-the-art engineering
Progressive Bend impeller, Sterrox® LCP material & ultra tight tip clearance
Round-frame design
Ideal upgrade for 14cm CPU coolers
Variant:

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.

SSO2 bearing
The NF-A14x25 G2 features the further optimised second generation of Noctua's renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability.

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.

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.



Further resources
Want to know more on this topic? Explore relevant articles and resources.

NF-A14x25(r) G2 performance: improvements for heatsinks, radiators and cases
The next-gen NF-A14x25 G2 takes cooling performance to the next level, but what specific improvements can you expect to see compared to its predecessor?

G2 fan series aerodynamic innovations
Building on the technological innovations of the NF-A12x25, the G2 models represent a further refined, second-generation implementation of this design approach.

etaPERF™ motor
Smarter, quieter, more efficient: The etaPERF™ motor maximizes power with minimal energy loss, delivering superior performance and near-silent operation.

SupraTorque™
SupraTorque™ ensures Noctua fans don’t lose speed under pressure, improving cooling efficiency—especially in high-resistance setups.
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