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

Plugged right into my nVidia Jetson Nano. Variable speed works great.

This 40x20mm fan fits Waveshare case for Nvidia Jetson Nano, 4-pin connector fits the board too. Software controlled. Well made and whisper quiet.

Installed easily with screws I had laying around. Turns on when its needed and off when its not. The only complaint is the rubber corners on the top of the fan eventually rubbed off and one day one of them jammed the fan blade up and almost overheated my nano. But I took the rest off and its fine now.

Noctua sets the standard for small, quiet, functional fans. My only desire is for Noctua to eventually adopt much thinner packaging. The current packaging, clearly design to reveal the products premium experience, is needlessly inconsiderate of its environmental impact.

Super quiet fan. My workflow improved and I can record now without the fan Boise in background.

Fantastic high quality fan. It is amazingly silent and includes many adapters and extras. Packaging and instructions are top notch. You really get what you pay for.

Just to be safe since my ASUS Prime Z390 a mother board was air-cooled, added this fan since the motherboard supported a 40 or 50 mm fan for cooling the heatsink on M2 SSD. Also attached temp sensor to M2 heatsink, Asus software controls fan speed automatic, great solution.

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.

As it was advertised

Unless Im running something intense, the PWM fan is usually off. Then when the Jetson Nano gets warm the fan turns on just enough to cool it. I never notice this fan - I have to look at the blades to see if its spinning because its so quiet. The default fan I replaced came with a third party acrylic Jetson Nano case, it was not PWM, always running full speed and a noisy little fan at that. Ive seen other comments on the default fan saying its not very loud. I suspect the low quality, default case fan varies in noise from unit to unit. If you want quiet - Get the Noctua PWM! I got the thick one, so I had to find some longer screws. I should have gotten the thin one which I expect would work fine and use the existing HW. At any rate, if quiet and sanity are worth a couple coffees to you, get the Noctua PWM fan, such an improvement over the default fan that came with the third party Jetson Nano case.