NoctuaNF-A4x10 PWM, Premium Quiet Fan, 4-Pin (40x10mm, Brown)

I used these fans as a "silent" upgrade on my Ender 3 printer, and they make the world of difference.There are tonnes of mounting options in the box, so you should have no problems finding an appropriate fixture. Also comes with various cable connectors/extensions/splitters, so they're really a one stop solution.These are not cheap fans, but the quality is apparent, they make little to no noise in the situation I am using them, one of which being completely open to the air (no cover) so much so that I don't even know when they're running, but cooling is 100% on point.Any ender 3 owners, I highly recommend taking a punt on these. I used to have my printer in the basement because anywhere else I could hear it through the entire house, but with these, and a new board upgrade, I can have my printer sat in my office, and have it running while I work without it disturbing me.

It feels a bit strange writing a review about a small case fan, but I'm so impressed by this one that I had to share my thoughts.I've built plenty of PCs, and used many different kinds of case fans, but this particular build is a fanless PC that I upgraded to use a second SSD hard drive. I noticed that the temperature was increasing a bit to over 50C - still in the SSD safe zone, but higher than I wanted so decided to add a case fan, accepting that it would probably be quite noisy.Not so!This fan comes with all the connectors you could need. I used the Low-Noise Adapter with the extension, and the anti-vibration mounts, and the result is almost silent operation. The fan speed varies properly according to the SYS_FAN output on the motherboard, and the temperature of the SSD drive no longer exceeds 36C.I have to say a word about presentation, as the packaging is incredible (considering it's a case fan)! The box has to be the most luxurious packaging for a case fan that I've ever seen. The box has flaps on the front and back so you can see the fan and the anti-vibration mounts, and with information about the fan. Opening the box reveals well presented accessories and the fan itself. I feel that the effort spent on packaging (while probably reflected in the price of the fan) reflects really well on the manufacturer.Overall, while this is not the cheapest case fan around, for me it represents the best value, and the near silent operation was a real surprise. I highly recommend this fan.

I Bought these to go into my MSI Gungnir 300P to replace the single 80mm NVME cooling fan as my RX7900XTX Hellhound when fitted in the vertically mounted and in outer slot position is still to long for the 80mm to fit behind but 40mm is perfect for that width between back of GPU and mobo and so mounted two of these instead. Noise wise they are excellent and do decrease NVMe drive temps. The only thing negative is price as they are expensive for their size but better than the competitors fans which I tried before and they didn't last long before becoming noisy and cable issue with one of them so these seem much better quality on that front as well albeit at a more premium price

Noctua fans.... need I say more? Honestly they are so well made, really quiet, they do a great job of keeping vibration to a minimum. And when we move away from the fan itself, first impressions, even for a case fan, are super high. Such attention and pride in their presentation, which follows suit inside with their fixings and added Y adapter. All of which are great quality.I’ve used these in a 4u server and really couldn’t be happier with their performance. No fuss visually. Brown, beige and no rgb ... and they are perfect functionally. Can’t go wrong here

Bought this to use as the ASST (assistant) fan in an ASUS TUF Z270 mark 1 motherboard - which needs a 40x40x10mm fan. This fits perfectly, has a 4-pin connector, and runs nice and silently.The packaging was as per other Noctua fans - i.e. a big box that looks great and is designed well, but really isn't necessary for a small thing like this - and various mounting screws and rubber thingies are included. Luckily it sits underneath the motherboard's thermal armour, as this means that the horrific brown fan is not on show - why Noctua use this colour is beyond me.

I replaced one of my stock fans on my ender 3 with this. Made a big difference in noise levels. It worked so well i ended up changing all of them to Noctua fans, dispite the hassle of converting the 24v output of the printer to 12v with buck converters.

Handy little guy, not as quiet as it should but better than stock

The most premium product that I have ever came around. It is well build, comes with plenty of accessories, such as Y connection, extension cable, some extra bits and rubber mounting bits to dampen any vibrations from the system. Very pleased with this product, I am considering getting another one - as a gift!