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

I used this to replace both the CPU fan and internal outward facing fan in my Amcrest DVR. It works really well and is extremely quiet, which was the issue I was having with the original DVR fans.

Im using the NF-A4x10 5v fans in 3D printed Raspberry Pi cases to house my Pi 4 units. The fan is really quiet but pushes plenty of air to help keep the CPU and board cool on the Pi. The fan can be driven directly off the PIs PGIO pins. However, I also recommend a grille/guard - either a wire one you buy or a 3D printed one - to keep your fingers safe when its running.

Works great and is extremely quiet, at least compared to what was in my Q-See surveillance nvr (I replaced the cpu fan in the nvr). Wasnt a perfect replacement for the nvr fan, but I was able to use the included with fan rubber mounts/insulators to install over the cpu.

Awesome cooling fan. Works great with ODROID C2, brought temps down from 69C to 32C. Extremely quiet and has a good airflow. Definitely worth the money.

The MiSTer I/O board comes with a fan that is quite loud but keeps the boards cool. Many have gone over to this fan for near silent operation. It was easy to install, but if you want a more custom fit, you will have to cut the cables down to make them smaller in length. However, the cables will fold and you can squeeze the cables to fit your MiSTer case well. You can run the fan at 3V for silent operation. You can also move the fan jumper and run it at 5V, but it will run a little louder.

Replaced a fan for a RP3B Temps now ~37c. Easy to install into a new CPU cooler.

Despite wondering why I was paying $14 for a tiny fan, I dont regret this purchase. I have this installed in a custom case for a Comma.ai self-driving device in my car. It keeps the device cool and is nearly inaudible with the car running. I can also trust that this thing will outlast the Comma device itself. A cheaper fan may have accomplished one or two of these things, but it sure wouldnt be able to do all 3.

So quiet! Replaced a fan in my Amcrest security system that was so loud. Great product

Quiet and moves the air... bought it to replace a underpowered fan on my 3d printer.

Got the job done perfectly and is super quiet. Love that it comes with a 3 pin to 2 pin adapter in the box. 10/10 would buy again