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  • Noctua NF-A14x25r G2 PWM Sx2-PP, Push-Pull Set of two Premium-Quality Quiet 140mm PC Fans (Brown)
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Noctua NF-A14x25r G2 PWM Sx2-PP, Push-Pull Set of two Premium-Quality Quiet 140mm PC Fans (Brown)

4.9 4.9 out of 5 stars (13)
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Purchase options and add-ons

Hard disk interface Serial ATA
Brand Noctua
Special feature Portable
Hard disk form factor 2.5 Centimetres
Hard disk description Solid State Drive
Compatible devices Desktop
Installation type Internal Hard Drive
Colour Black
Specific uses for product DE
Included components NF-A14x25r G2 PWM Sx2-PP

About this item

  • Dedicated push-pull set (Sx2-PP) with two round-frame NF-A14x25r G2 PWM 140x25mm fans that are slightly off-set in speed (+/- ~25rpm) in order to avoid undesired acoustic interaction phenomena
  • 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)
  • Ideal choice for push-pull applications on 14cm CPU coolers such as the NH-D15, NH-D15S or NH-U14S series, next-generation quiet cooling performance with unprecedented acoustic fine-tuning measures
  • Includes anti-vibration mounts, fan screws, Low-Noise Adaptors (LNA), extension cables and y-cable for running two fans on the same header
  • Trusted Noctua quality with premium-grade SSO2 bearing (MTTF > 150,000 h), safety certifications from UL and TÃœV, protected against reverse polarity, over voltage and over current (short-circuits)
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Top Brand

Noctua

98% positive ratings from 1K+ customers

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Frequently bought together

Noctua NF-A14x25r G2 PWM Sx2-PP, Push-Pull Set of two Premium-Quality Quiet 140mm PC Fans (Brown)
This item: Noctua NF-A14x25r G2 PWM Sx2-PP, Push-Pull Set of two Premium-Quality Quiet 140mm PC Fans (Brown)
£67.60
Get it as soon as Thursday, Jan 23
Only 3 left in stock.
Sold by NOCTUA - Designed in Austria and sent from ÍøÆغÚÁÏ Fulfillment.
+
Noctua NF-A14x25 G2 PWM Sx2-PP, Dual Fan Set for Push-Pull and Side-by-Side Applications (Brown)
£65.50
Get it as soon as Thursday, Jan 23
In stock
Sold by NOCTUA - Designed in Austria and sent from ÍøÆغÚÁÏ Fulfillment.
Total price:Ìý$00
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Product Description

NF-A12x25 PWM header

The NF-A14x25r G2 PWM Sx2-PP is a set of two NF-A14x25r G2 PWM round-frame 140mm fans for push-pull operation on heatsinks such as the NH-D15(S) or NH-U14S. When two fans operate in a push-pull configuration running at almost the same, constant speed, their acoustic interaction can lead to undesirable harmonic phenomena such as intermittent vibrations or periodic humming due to interference, which can be heard as beat frequencies. Therefore, the two NF-A14x25r G2 PWM fans contained in the Sx2-PP set are slightly offset in speed (+/- ~25rpm) in order to avoid such phenomena. This fine-tuning is made possible by the fans’ novel etaPERF motor and its NE-FD6 driver IC that achieves extremely precise speed control and, thanks to its SupraTorque feature, can leverages extra torque headroom to keep the exact desired speed even when working against significant flow resistance such as on heatsinks. With one fan running ~25rpm slower (PPA) and one ~25rpm faster (PPB), the overall cooling performance can be kept the same while efficiently preventing intermittent vibrations or periodic humming. Since the perception of beat frequencies can vary depending on psychoacoustic preferences, users can easily further optimise acoustics by slowing the PPA fan down a little more through PWM control or the supplied Low-Noise-Adaptor, which will result in an even smoother sound signature due to the increased offset.

nf-a12x25

Push-pull set

Bundling two NF-A14x25r G2 PWM fans that are speed-offset by +/- 25rpm in order to avoid undesired acoustic interaction phenomena, the Sx2-PP set is the ideal choice for push-pull configurations on 140mm class coolers such as the NH-D15(S) or NH-U14S.

Sterrox

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

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.

motor hub

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.

pwm scope

Scope of delivery

  • NF-A14x25r G2 PWM PPA
  • NF-A14x25r G2 PWM PPB
  • 2x NA-RC16 Low-Noise Adaptor (L.N.A.)
  • NA-YC1 4-pin PWM splitter cable
  • 2x NA-EC1 30cm extension cable
  • 8x 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
Customer Reviews
4.8 out of 5 stars
14
4.9 out of 5 stars
13
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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Noctua NF-A14x25r G2 PWM Sx2-PP, Push-Pull Set of two Premium-Quality Quiet 140mm PC Fans (Brown)

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