Noctua NF-A14x25 G2 PWM Sx2-PP – Next-Gen 140mm Dual Fan Set
The NF-A14x25 G2 PWM Sx2-PP is a matched set of two Noctua NF-A14x25 G2 PWM 140mm fans, factory speed-offset by roughly ±25rpm to prevent the beat-frequency humming that can occur when two fans run side by side or in push-pull – ideal for 280mm radiators, push-pull tower coolers, or twin case fan setups.
Key Features
- Two speed-offset NF-A14x25 G2 PWM fans in one set, purpose-built for push-pull and side-by-side use
- Next-gen Progressive-Bend impeller with Flow Acceleration Channels and Sterrox® LCP construction
- Ultra-tight 0.7mm tip clearance for maximum efficiency against back pressure
- SSO2 bearing with 6-year manufacturer warranty
- Includes Low-Noise Adaptor, PWM splitter cable, extension cable, and full anti-vibration mounting hardware
Specifications (per fan)
| Size | 140 x 140 x 25mm, square frame |
|---|---|
| Speed Range | 0 – 1500 RPM (PWM controlled) |
| Airflow (max) | 155.6 m³/h (91.6 CFM) |
| Static Pressure (max) | 2.56 mm H₂O |
| Noise (max) | 24.8 dB(A), 19.7 dB(A) with L.N.A. |
| Bearing | SSO2 |
| Connector | 4-pin PWM |
| Speed Offset (set) | ±~25rpm between the two fans |
| Warranty | 6 years |
Compatibility & Setup Notes
- Standard 140mm mounting hole spacing (124.5 x 124.5mm) – fits any 140mm case fan mount or radiator position.
- 4-pin PWM connector works with any motherboard or fan hub PWM header.
- Great pairing for 280mm AIO radiators, or as a matched intake/exhaust pair in a case.
Questions & Answers
Q: Why are the two fans speed-offset instead of identical?
A: When two fans run at nearly the same speed side by side or in push-pull, their acoustic interaction can cause a periodic humming known as a beat frequency. Offsetting the fans by ~25rpm each avoids this while keeping combined airflow the same.
Q: Can I use these on a radiator?
A: Yes – the tight 0.7mm tip clearance and optimised P/Q curve make these fans well suited to radiator and heatsink use as well as case airflow.
Q: Will these work with my case’s fan headers?
A: Yes, each fan uses a standard 4-pin PWM connector, and the set includes a PWM splitter cable so both fans can run off a single motherboard header.
Q: Do these fit my Noctua CPU cooler?
A: 140mm fans fit Noctua’s 140mm tower coolers such as the Noctua NH-D15 G2, and are also great as extra intake/exhaust fans in any case.
Related Products
- Noctua NH-D15 G2 CPU Cooler – upgrade or replace fans on this flagship air cooler
- Noctua NL-LC1-42 420mm AIO Liquid Cooler – pair as extra case intake/exhaust fans
- AMD Ryzen 9 9950X3D2 Dual Edition – strong airflow pairing for a 200W TDP build
Learn more from Noctua directly: official NF-A14x25 G2 PWM Sx2-PP product page.
