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Noctua NF-A14x25r G2 PWM, Premium-Quality Quiet Round-frame 140mm PC Fan, 4-pin (Brown)

4.8 4.8 out of 5 stars 11 ratings
Product dimensions 14L x 2.5W x 14H centimetres
Brand Noctua
Power connector type 4-Pin
Voltage 12 Volts
Wattage 2.28 watts
Cooling method Air
Compatible devices Desktop
Noise level 24.8 dB
Material Sterrox LCP
Maximum rotational speed 1.5E+3 RPM

About this item

  • Next-generation round-frame 140x25mm design for unprecedented quiet cooling performance on 14cm CPU coolers such as the NH-D15, NH-D15S or NH-U14S series
  • 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)
  • 4-pin PWM version for automatic speed control via 4-pin PWM motherboard fan headers, 300-1500rpm speed range (near-silent at idle, powerful under load), fan stops at 0% PWM (semi-passive option)
  • Includes anti-vibration mounts, 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)
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Noctua NF-A14x25r G2 PWM, Premium-Quality Quiet Round-frame 140mm PC Fan, 4-pin (Brown)

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What's in the box?

  • NF-A14x25r G2 PWM

    • Product Description

    NF-A12x25 PWM header

    Succeeding the award-winning NF-A15 and building on the technological innovations of the ground-breaking NF-A12x25, the NF-A14x25r G2 is Noctua’s next-generation round-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-A14x25r G2 to further improve its predecessor’s renowned quiet cooling performance. This makes it not only a perfect fit for Noctua’s next-generation 140mm class heatsinks but also an excellent upgrade for existing cooler models such as the NH-D15(S) or NH-U14S series (Sx2-PP set recommended for push/pull configurations). The 4-pin PWM version supports fully automatic speed control via PWM fan headers and comes with a Low-Noise Adaptor to reduce the maximum speed from 1500 to 1250rpm. Its ultra low-loss etaPERF motor with Smooth Commutation Drive 2 technology doesn’t only provide unprecedented energy efficiency and running smoothness but thanks to the new SupraTorque feature, it can also leverage extra torque headroom to keep the fan at its desired speed when working against back pressure, thereby ensuring even better performance on heatsinks. Topped off with Noctua’s reference-class SSO2 bearing and a rich bundle of accessories, the NF-A14x25r 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.

    nf-a12x25

    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.

    Sterrox

    SSO2 bearing

    motor hub

    pwm scope

    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-RC16 Low-Noise Adaptor (L.N.A.)
    • NA-YC1 4-pin PWM splitter cable
    • NA-EC1 30cm extension cable
    • 4x NA-AV2 anti-vibration mounts
    • Fan screws
    PQ curve

    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.

    pwm flx
    NF-A14x25r G2 PWM NF-A14x25r G2 PWM Sx2-PP
    See Details
    Customer Reviews
    4.8 out of 5 stars
    11
    5.0 out of 5 stars
    6
    Price — £54.96
    Connector 4-pin PWM 4-pin PWM
    Voltage 12 V 12 V
    RPM 1500 RPM 1500 RPM
    RPM with L.N.A. 1250 RPM 1250 RPM
    Acoustical Noise 24.8 dB(A) 24.8 dB(A)
    Acoustical Noise with L.N.A. 19.7 dB(A) 19.7 dB(A)
    Size 140x140x25 140x140x25
    Colour Brown & Beige Brown & Beige
    Quantity x1 x2

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    Customer reviews

    4.8 out of 5 stars
    11 global ratings

    Top reviews from United Kingdom

    There are 0 reviews and 1 rating from United Kingdom

    Top reviews from other countries

    Translate all reviews to English
    Serene
    5.0 out of 5 stars Pretty strong airflow!
    Reviewed in the United States on 19 August 2024
    Verified Purchase
    I knew these are primarily made for CPU coolers but I really wanted to buy them anyways for my fractal north case which I use them on the mesh side to give my graphics card and cpu with plenty of cool air.
    Report
    Bertrand B
    5.0 out of 5 stars Top
    Reviewed in France on 22 August 2024
    Verified Purchase
    La version précédente était déjà parfaite, celle-ci est encore mieux
    Report
    Sgpros
    5.0 out of 5 stars great fan
    Reviewed in Singapore on 17 September 2024
    Verified Purchase
    no regret from buying noctua product..
    Report
    Nathanial Madanick
    4.0 out of 5 stars 120mm Mounting Pattern on ‘t’ designated variation
    Reviewed in the United States on 4 September 2024
    Verified Purchase
    I’ve been waiting on the release of the 140mm x25 fan, this version features a 120mm mounting pattern, these variations are designated with an ‘r’, and have a round frame style, and are purpose designed as 140mm fans with 120mm screw placement. The traditional square frame version (non-r), which will have a 140mm mounting pattern, has not been released at the time of this review. Scheduled for September 2024.

    That said, I really wanted to mount these fans on a 280mm radiator. Fortunately, Noctua makes a mounting adapter that, with a little modification (a rough trim with aviation snips), can be cut down to the corner pieces, providing the perfect fit for 140mm mounting points. I’m sure a neater job could have been accomplished with a rotary tool, or even 3D Printing. But for ~$13 adapters, they were cheap enough to just modify.

    I’ve attached a photo showing the NF-A14x25r on a 280mm radiator, alongside another photo with the 120mm Square brethren, the NF-A12x25 for comparison Side-by-side. And the final put together radiator with semi-DIY adapters.
    Customer image
    Nathanial Madanick
    4.0 out of 5 stars 120mm Mounting Pattern on ‘t’ designated variation
    Reviewed in the United States on 4 September 2024
    I’ve been waiting on the release of the 140mm x25 fan, this version features a 120mm mounting pattern, these variations are designated with an ‘r’, and have a round frame style, and are purpose designed as 140mm fans with 120mm screw placement. The traditional square frame version (non-r), which will have a 140mm mounting pattern, has not been released at the time of this review. Scheduled for September 2024.

    That said, I really wanted to mount these fans on a 280mm radiator. Fortunately, Noctua makes a mounting adapter that, with a little modification (a rough trim with aviation snips), can be cut down to the corner pieces, providing the perfect fit for 140mm mounting points. I’m sure a neater job could have been accomplished with a rotary tool, or even 3D Printing. But for ~$13 adapters, they were cheap enough to just modify.

    I’ve attached a photo showing the NF-A14x25r on a 280mm radiator, alongside another photo with the 120mm Square brethren, the NF-A12x25 for comparison Side-by-side. And the final put together radiator with semi-DIY adapters.
    Images in this review
    Customer image Customer image Customer image Customer image Customer image
    Customer imageCustomer imageCustomer imageCustomer imageCustomer image
    Report
    Iz
    5.0 out of 5 stars Good fan
    Reviewed in the United States on 23 July 2024
    Verified Purchase
    High quality fan from Noctua. Added to my Noctua CPU cooler. Definitely pricey but I had gift card balance. Noise is a bit higher pitched from the previous model. Running at moderate speeds works great to keep the temps and noise low.
    Report