Noctua NF-A4x20 5V PWM, Premium Quiet Fan, 4-Pin, 5V Version (40x20mm, Brown)

As it was advertised

This is a very good fan that fitted well on my Nvidia Jetson Nano. It has a very low noise when it is running at full speed. I did some experiments by running various loads on the CPU to see how it behaves and it worked really well to keep the CPU temperature at the set value.

Its a little tall in proportion to the Jetson Nano but it works great.

Kind of forced to use noctuas because the only other 40mm 5v 4pin fans available are tied to the Jetson nano and they straight didnt work for me so i had to get these puke colored babies which worked like a charm.

Purchased to cool my raspberry pi. Modified the pinout a bit. Its quiet and circulates air well - true to Noctuas reputation.

I am really impressed with the amount of additional cables, connectors, and mounting options provided. I ordered the fan to place inside of a fursuit (costume) head. It is very quiet, if even one person is talking you cannot hear it running. The air flow is low, but it is constant and hands free so that is very nice. I thought it might be much louder than it was which is why I ordered the PWM version. Since it is *so* quiet theres no reason to not let it spin at full speed unless your application is severely power limited.

Works the way is supposed to as advertised. A little bit noisy tho, but it does cool down my Jetson Nano quite a bit.

perfect for the Nvidia Jetson Nano.

The rubber anti-vibration pads can squeeze out and detach if you sandwich the fan between a fan guard and a Jetson Nanos heat sink then bolt it down tight.

Im using this to cool a Raspberry Pi running a 3d printing server. It would overheat causing the printer to stutter - but no longer. This fan is impressively small delivering impressive airflow and virtually silent. Im very satisfied.