Noctua NF-A14x25 G2 LS-PWM 800RPM 140mm Next Gen Fan NF-A14X25-G2-LS-PWM

[features] Building on the success of the NF-A14 and the innovations of the NF-A12x25; Noctua’s NF-A14x25 G2 is a next-generation; square-frame 140mm flagship fan crafted from Sterrox LCP. Its advanced Progressive-Bend impeller with winglets; Flow Acceleration Channels; and Centrifugal Turbulator hub—paired with a remarkably tight 0.7mm tip clearance—delivers enhanced quiet cooling performance. Designed as a true all-rounder; it excels in both low-impedance; airflow-oriented applications like case ventilation; and high-impedance scenarios requiring strong static pressure; such as on heatsinks and radiators. The pre-installed NA-AVG2-LR anti-vibration gasket ensures a secure seal on radiators; while the AAO frame can be paired with the optional NA-IS1-14 inlet spacer to improve suction acoustics and airflow in challenging intake configurations. The 4-pin LS-PWM version is a low-speed; PWM-enabled model ideal for semi-passive or ultra-quiet systems requiring precise speed control and near-silent operation. Its etaPERF motor with Smooth Commutation Drive 2 technology offers outstanding energy efficiency and smooth running; meeting the demands of even the most noise-sensitive users. Combined with Noctua’s premium SSO2 bearing and an extensive accessory package; the NF-A14x25 G2 sets a new benchmark in cooling performance; making it a top-tier choice for discerning enthusiasts and professionals alike.
Centrifugal Turbulator hub Acting as a turbulator; the new Centrifugal Turbulator hub design improves flow attachment in the hub region. At the same time; it’s 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. 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.