Noctua NF-A4x10 5V PWM, High-Performance Quiet Fan 40mm | High Airflow Low Noise, 5V, 10mm Slim Fan, for Ventilation and Electronics Cooling, USB-A Power Adaptor, 5000rpm 4-Pin PWM

I’m using these in a 1U server and they work great at keeping the hard drives cool. They move plenty of air for their size and are surprisingly quiet, especially compared with the fans that came with the server case. Very happy with them.

Use these on my small Orange/Raspberry PI SBC to keep then cool using the on board 5V rail and/or USB jacks. Quiet and moves the right amount of air.

I've used Noctua fans in several home-build computers. Great quality and whisper quiet. This Noctua NF-A4x10 5V PWM comes with mounting hardware and USB adapter cable. Plug it in to any USB-A power source and it's on. Compact and quiet. Small size does not provide huge airflow. Yet perfect for quietly cooling small electronics. I have it on top of our cable modem which gets very hot without a fan.

Running for almost 6 years non-stop. Audible but quiet. It is being used to cool a Roku 4K stick that persistently overheats and crashes, but no more!

Excellent fan, amazingly quiet. Using it with the USB adapter to keep the Eufy Homebase 3 cool

It is a Noctua - what more can one say :) Make sure you know what you are getting though. 12v vs 5v version. I got this specifically to cool and external SFP via USB.

I used this to replace the control board fan in a Bambu X1C 3D printer - the stock fan is of poor quality and becomes noisy, with many users experiencing this. (I do expect Bambu to change suppliers.) This fan fits where the stock fan does, but requires that you splice the original connector to the Noctua cable. This is where it gets annoying. The so-called "OmniJoin" is just a set of four pushbutton splice connectors. You have to cut off the Noctua connector and splice the individual wires to those from the original connector. The leads must be stripped, and you have only one chance to use the splice button to connect them. I gave up and soldered the leads. Noctua fans don't move a lot of air, but they are quiet. For this application, the fan was fine.

Great product very quiet and does the job Came with several options for connection including USB which I used definitely worth the money

Increíble cómo algo tan pequeño puede mover tanto aire sin sonar como un mosquito enfadado. Lo he usado para sustituir el ventilador de serie de una impresora 3D y el cambio es brutal; ahora el silencio es casi total. Noctua nunca falla con la calidad de sus rodamientos.

Der Noctua NF-A4x10 5V PWM ist für mich einer der besten Lüfter in dieser Größenklasse – da gibt es eigentlich nicht viel zu sagen. Die Verarbeitung ist, wie von Noctua gewohnt, erstklassig und der Lüfter arbeitet trotz seiner kompakten Abmessungen angenehm leise. Dank der PWM-Regelung lässt sich die Drehzahl präzise anpassen, sodass bei geringer Last kaum etwas zu hören ist und bei Bedarf trotzdem eine überzeugende Kühlleistung zur Verfügung steht. Zum Lieferumfang gehören zudem hochwertiges Zubehör wie Entkoppler und Adapter, sodass einer unkomplizierten Installation nichts im Weg steht. Wer Wert auf Qualität, Langlebigkeit und einen leisen Betrieb legt, macht mit diesem Lüfter nichts falsch. Klare Kaufempfehlung!

I bought this fan as I wanted to use it as an extractor on a Raspberry Pi case - I needed something small, silent and low voltage so it could be run from the Pi's USB ports. This fan achieved all those goals and more! It came with a USB adapter, which left the cable pretty long - too long to go a few cm into a USB port on the side of a Pi - so I cut the wires and soldered the USB connector directly on to the wires leaving the fan housing - very simple to do thanks to the nice design from Noctua and it's happily doing its job of keeping a Raspberry Pi nice and cool. Obviously at 5v it doesn't have a lot of oomph, but for its size and how silent it is, it does move a good amount of air. Impressed and recommended for smaller projects such as Raspberry Pi based builds!

Ventola molto silenziosa. Arriva con una ricca fornitura di cavi ed accessori per la sua installazione. La sto adoperando per raffreddare un hotspot su base Raspberry Pi 3 Model B Plus, che si sa scalda molto. Bene riesco a mantenere una temperatura compresa tra i 28° ed i 36°. Prova superata a pieni voti. Consigliata.

The added USB cable saved me a lot of headache. Really good documentation on the cable colors. All in all a very good fan :)