|Model Number||NF-A4x20 PWM|
|Part Number||NF-A4x20 PWM|
|Noise level||14.9 dB|
|Has Auto Focus||No|
|Includes Rechargable Battery||No|
|Supports Bluetooth Technology||No|
|Has Programmable Buttons||No|
|Item model number||NF-A4x20 PWM|
|Product Dimensions||4 x 2 x 4 cm; 180 Grams|
Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown)
Enhance your purchase
|Item dimensions LxWxH||40 x 20 x 40 millimetres|
|Power connector type||4-Pin|
About this item
- Enter your model number to make sure this fits.
- Premium quiet fan, 40x40x20 mm, 12V, 4-pin PWM, max. 5000 RPM, max. 14.9 dB(A), >150,000 h MTTF
- Award-winning A-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
- 40x20mm size ideal for 1U servers or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs
- 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, 5000rpm maximum speed (4400rpm with supplied Low-Noise Adaptor)
- Includes anti-vibration mounts, fan screws, extension cable, y-cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers
Frequently bought together
Have a question?
Find answers in product info, Q&As, reviews
Your question might be answered by sellers, manufacturers or customers who bought this product.
Please make sure that you've entered a valid question. You can edit your question or post anyway.
Please enter a question.
Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A4x20 is a highly optimised, premium-quality quiet fan in size 40x20mm. The PWM version sports Noctua’s custom-designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers and comes with a Low-Noise Adaptor as well as an OmniJoin Adaptor Set for easy connection to proprietary fan headers. Its superb running smoothness, reference-class SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands.
Review this product
Top reviews from other countries
I have installed these in the Ubiquiti UniFi Security Gateway Pro, it is enterprise grade equipment that has been designed with function as a priority, so as stock the noise levels are ridiculous for a home / home office environment.
After installing these fans I immediately saw a reduction in sound, there is still an audioable noise level, it’s not silent but there 40mm so you have to expect some noise.
These are a direct swap for the fans installed in the UniFi USG and come with an array of mounting and speed adjusting parts, I have just mounted mine with the main cable, without adjusting the speeds or using rubber mounting hardware.
The horizontal fan behind them creates a fast-moving vertical column of very cold air, which prevents heat build-up in the very top of the case (useful given the poor heat-management of the VRM-modules on the MSI X570-Pro A), and the two sweet little Noctuas drive some of this cool air straight across the metal back-plate of the RTX-3070 and out via the rear exhaust without passing go or collecting £200. Thus ensuring the upper half of the case never gets to 40 degrees C on a Summer's day whatever else is going on around the system.
I'm about to buy 2 more of these to create some cyclones around those crappy VRM heatsinks and the somewhat poor MOSFETS below them. They push an amazing amount of air for their size and surprisingly low noise levels: ideal for chaining as "slaves" to other fans and sticking to the motherboard with Gorilla Tape in order to create motherboard-surface-level air flow around its larger components.
Mein eigentliches Problem ist die viel, viel zu aufwendige Verpackung und ganzen beigelegten Kabel, die vermutlich niemand braucht. Würde man das alles weglassen, könnte man den Lüfter wahrscheinlich für die Hälfte anbieten! Das ist ein 40mm Lüfter für Server-Gehäuse und Netzteile und kein I-Phone! Der Lüfter wird in 99% der Fälle aus der Verpackung genommen, eingebaut und eingesteckt und dann wird die Verpackung, die selbst I-Phone Besitzer neidisch machen würde samt der 4 (!) Verlängerungs-, Split-, usw. Kabel weggeworfen.
Schade um die ganzen Materialien und schade um mein Geld.
Having switched from a full ATX case with the NZXT H1 i found the thermals to be less than ideal. A Ryzen 3800X combined with a RTX2070 Super meant that there is alot of heat in the case and no active way to get rid of it. A genius on Reddit figured out these fans fit in the back of the chassis and can help expel the heat (no larger fans will fit unless you bolt them to the outside).
I've got 3; 1 for the CPU side and 2 for the CPU side. Do they help? Yes, with a reduction of 4-8 degrees. Not alot, but enough to keep the card from tripping over the thermal throttling threshold. They are silent until temperatures from the CPU hit the 70s when they kick in. Yes at 100% they are audible, but it's a high pitch whine.
There is the usual Noctua quality, and colour scheme (more Chromax please!). Definitely recommend these if you have an NZXT H1. Some people have gone as far as adding 4 or 5, too many for my liking.
Great little fans.
Can't say how impressed I am with the quietness of this fan.
I placed this fan on top of the RAM sticks, so it blows cold air between the RAM sticks, thus lowering their high temperatures.
👉 There was no need to adjust the speed of this fan because even at MAX. speed (5000RPM) - it does not make noise.
✔ Focused airflow (meaning straight air path for better dissipation)
✔ Superior build quality / Top notch materials
✔ Many different cables, anti-vibration mounts to fit your needs
I will update if I find anything on continuous use.
I would recommend this product without reservation to anyone looking for a high-quality fan.