About this item Next-gen 140x25mm design for unprecedented quiet cooling performance in both high airflow and high static pressure applications: ideal as a PC case fan, on CPU coolers and water cooling radiators! State-of-the-art engineering (Progressive-Bend impeller with winglets and Centrifugal Turbulator, Flow Acceleration Channels, AAO frame) and construction (Sterrox LCP, ultra-tight tip clearance) Ultra-quiet 4-pin low-speed PWM version with 800rpm maximum speed, ideal for semi-passive setups (fan stops at 0% PWM) or ultra-low-noise applications that require PWM control Includes anti-vibration mounts, 14cm anti-vibration gasket for tighter seal on radiators, fan screws, Low-Noise Adaptor (LNA), extension cable and y-cable for running two PWM fans on the same header Trusted Noctua quality with premium-grade SSO2 bearing (MTTF > 150,000 h), safety certifications from UL and TÜV, protected against reverse polarity, over voltage and over current (short-circuits) Product Description Succeeding the award-winning NF-A14 and building on the technological innovations of the ground-breaking NF-A12x25, the NF-A14x25 G2 is Noctua’s next-generation square-frame 140mm flagship model: Made from Sterrox LCP, its highly optimised Progressive-Bend impeller with winglets, Flow Acceleration Channels and Centrifugal Turbulator hub combined with a tip-clearance of only 0.7mm allow the NF-A14x25 G2 to further improve its predecessor’s renowned quiet cooling performance. Like the NF-A14 and NF-A12x25, it is a true all-rounder that yields superb results in all types of usage, regardless of whether it’s in low-impedance, airflow-oriented applications such as case cooling, or high-impedance, static pressure demanding scenarios such as on heatsinks and water cooling radiators. For application-specific optimisation, the NF-A14x25 G2 comes with an NA-AVG2-LR anti-vibration gasket pre-installed to create a tighter seal on radiators. Additionally, its AAO (Advanced Acoustic Optimisation) frame can be combined with the optional NA-IS1-14 inlet spacer, which can help to achieve superior suction acoustics and flow rates in challenging intake configurations. The 4-pin LS-PWM version is a low-speed, PWM-enabled variant that is ideal for semi-passive setups or ultra-low-noise applications that require near-silent acoustics and PWM based speed control. Its super-low-loss etaPERF motor with Smooth Commutation Drive 2 technology combines unprecedented energy efficiency with a superb running smoothness that is guaranteed to satisfy even the most noise-sensitive users. Topped off with Noctua’s reference-class SSO2 bearing and a rich bundle of accessories, the NF-A14x25 G2 is a premium-quality product through and through. Its superior performance, comprehensive feature set, cutting-edge construction and state-of-the-art materials set a new standard within Noctua’s portfolio and make it an elite choice for the most discerning demands. Ultra-quiet low-speed version with PWM Producing only 11.4 dB(A) at its 800rpm maximum speed and 8.6 dB(A) with the included Low-Noise Adaptor, the LS-PWM version is ideal for serious silent-enthusiasts: An ultra-quiet low-speed fan that supports PWM control for advanced acoustic fine-tuning! 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. Scope of delivery NA-RC8 Low-Noise Adaptor (L.N.A.) NA-YC1 4-pin PWM splitter cable NA-EC1 30cm extension cable 4x NA-AV2 anti-vibration mounts NA-AVG2-LR anti-vibration gasket 4x NA-AVP1-LR load-relief anti-vibration pads Fan screws 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. NF-A14x25 G2 PWM NF-A14x25 G2 LS-PWM NF-A14x25r G2 PWM NF-A14x25 G2 PWM Sx2-PP NF-A14x25r G2 PWM Sx2-PP Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.8 out of 5 stars 32 4.1 out of 5 stars 6 4.8 out of 5 stars 13 4.7 out of 5 stars 30 4.9 out of 5 stars 13 Price $39.90 $39 . 90 $39.90 $39 . 90 $39.95 $39 . 95 $76.90 $76 . 90 $76.95 $76 . 95 Connector 4-pin PWM 4-pin PWM 4-pin PWM 4-pin PWM 4-pin PWM Voltage 12 V 12 V 12 V 12 V 12 V RPM 1500 RPM 800 RPM 1500 RPM 1500 RPM 1500 RPM RPM with L.N.A. 1250 RPM 600 RPM 1250 RPM 1250 RPM 1250 RPM Acoustical Noise 24.8 dB(A) 11.4 dB(A) 24.8 dB(A) 24.8 dB(A) 24.8 dB(A) Acoustical Noise with L.N.A. 19.7 dB(A) 8.6 dB(A) 19.7 dB(A) 19.7 dB(A) 19.7 dB(A) Size 140x140x25 140x140x25 140x140x25 140x140x25 140x140x25 Colour Brown & Beige Brown & Beige Brown & Beige Brown & Beige Brown & Beige Quantity x1 x1 x1 x2 x2
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