Noctua NF-A4x10 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x10mm, Brown)

I put two of these with the 52pi ice tower in push pull on my Pi4. they work great in comparison to the stock fans. This are a little quieter but make MUCH less vibration. They supply everything you need in the package to make this work with your pi, except the leads to connect it onto the pi board, so you will need to cannibalize an old pi fan.

Basically runs just above a whisper; if youre more than eight inches from this thing, you dont know its spinning because its just not making any sound at all. Comes with a lot of adapters and such, probably spikes the price higher than it should be, but Im certainly satisfied with the reduction in RPM noise

These are SO quiet I cant tell they are on even when sitting in my lap and powered up. Im using these for a cooling in a helmet and I tried a cheaper type fan but as soon as it was glued it the bearings started grinding and got too loud. These 5v fans will work amazing with a usb power connection in the helmet. Im currently testing the battery life before I put them in the costume. With 2 of them plugged in and sitting right next to me at the desk I cant hear them 1 foot away.

As described

This fan does its job, and does it so quietly that I forget that its running. Ive been using it for about 2 months now as an extrusion motor fan on my Prusa MK3S, and its been running continuously from a 5v port from a Raspberry Pi 2.

I must have received a bad batch or something because the noise was unbearable.

Expensive, but very effective and when using the elastic mounts very quiet.

Was looking for a fan to keep my raspberry pi cooler while I have it mounted on to a ender 3 3D printer and it does pretty good, even with it being in inside a enclosure tent for the printer.

Good works good with reolink cameras nvr

Great little fan that pushes a ton of air for its size and comes with a variety of connectors to fit your needs my only complaint is the wires are a bit long so cable management can be tricky if you’re working with something small like a pi other than that this fan is stellar