Noctua NF-A6x25 PWM, Premium Quiet Fan, 4-Pin (60mm, Brown)
Bottom line: The Noctua NF-A6x25 PWM: 19.3 dB(A) max noise at full 3000 RPM tilt; main trade-off: 60mm size moves less air than 80mm or 120mm fans.
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Pros & Cons
Pros
- ✓ 19.3 dB(A) max noise at full 3000 RPM tilt
- ✓ Wide 550-3000 RPM PWM range via 4-pin header
- ✓ Low-Noise Adaptor caps it at 2300 RPM for silence
- ✓ Ships with anti-vibration mounts, extension and y-cable
Cons
- ✗ 60mm size moves less air than 80mm or 120mm fans
- ✗ Brown and beige color clashes with most builds
- ✗ 3-pin headers cannot use the PWM speed control
- ✗ Y-cable splits one header, so both fans share a speed
Manufacturer description
The Noctua NF-A6x25 PWM is a 60x60x25 mm premium quiet fan built for the small enclosures where stock fans whine loudest. Noctua's A-series design pairs Flow Acceleration Channels with an Advanced Acoustic Optimisation frame, so the fan pushes air through restrictive grilles and dense heatsinks without the turbulence buzz that makes cheap 6cm fans unbearable. Peak output is 3000 RPM at 19.3 dB(A), and the 4-pin PWM connector lets your motherboard, DVR, or NAS throttle it anywhere across a broad 550-3000 RPM range. Drop in the supplied Low-Noise Adaptor and the ceiling falls to 2300 RPM for…
SpecPicks Verdict
SpecPicks scored Noctua NF-A6x25 PWM using a rating × review-volume × price-fit model applied to published specs and reviews across the PC & gaming hardware category. Noctua's PC & gaming hardware lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for PC & gaming hardware of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Will this fit my DVR, NAS, or 3D printer?
It uses the standard 60x60x25 mm form factor with 12V power, so it drops into any device that takes a 6cm fan of that depth. Measure your existing fan's thickness first, since 60x10 mm and 60x15 mm slots will not clear 25 mm.
How loud is the NF-A6x25 PWM?
Noctua rates it at a maximum of 19.3 dB(A) at its full 3000 RPM speed. With the included Low-Noise Adaptor the ceiling drops to 2300 RPM, which lowers noise further.
Can I control the speed if my board only has 3-pin headers?
PWM speed control needs a 4-pin header. On a 3-pin connection the fan runs at full speed unless the host uses voltage control, though the supplied Low-Noise Adaptor still caps it at 2300 RPM.
What comes in the box?
Anti-vibration mounts, fan screws, a Low-Noise Adaptor, an extension cable, and a y-cable that runs two PWM fans from a single header.
How long will this fan last?
Noctua rates the NF-A6x25 PWM at more than 150,000 hours MTTF. Check the product listing for current warranty terms.
Key Features
- Premium quiet fan, 60x60x25 mm, 12V, 4-pin PWM, max. 3000 RPM, max. 19.3 dB(A), >150,000 h MTTF
- Award-winning 60x25mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
- Ideal replacement for noisy or broken 12V 6cm fans in DVRs, NAS, network and storage devices, 3D printers, etc.
- 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, broad 550-3000rpm speed range (2300rpm max. with supplied Low-Noise Adaptor)
- Includes anti-vibration mounts, fan screws, Low-Noise Adaptor, extension cable and y-cable for running two PWM fans on the same header
Full Specifications
| Brand | Noctua |
|---|---|
| Model | NF-A6x25 PWM |
| Voltage | 12 Volts |
| Material | Fibre-glass reinforced PBT |
| Dimensions | 60x60x25 mm |
| Unit Count | 1.0 Count |
| Noise Level | 19.3 Decibels |
| Part Number | NF-A6x25 PWM |
| Material Type | Fibre-glass reinforced PBT |
| Cooling Method | Air |
| Number of Items | 1 |
| Vibration/Rumble | Yes |
| Air Flow Capacity | 29.2 Cubic Meters Per Hour |
| Compatible Devices | Desktop |
| Power Connector Type | 4-Pin |
| Warranty Description | 6 year manufacturer’s warranty |
| Maximum Rotational Speed | 3000 RPM |
| Item Dimensions L x W x H | 2.36"L x 2.36"W x 0.98"H |
| Global Trade Identification Number | 00842431012524, 04716123315636 |
Ready to buy?
Noctua NF-A6x25 PWM, Premium Quiet Fan, 4-Pin (60mm, Brown) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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