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

I purchased this fan as a replacement for the one which came with ICY DOCK ToughArmor HDD enclosure. I went with Noctua brand because of the reviews and I am really impressed with the product. The build quality is pretty good and noise level is perfectly suited for desktop PC installation. I was looking for a fan that can operate quietly and at the same time provide adequate airflow into the HDD enclosure. This product lives up to its great reviews and reputation. There is nothing much for me to say, I would definitely recommend it.

Product advertised as quiet, sounds like a rocket ship. Too loud for silent setup use. Will be returning.

Noctua is a get what you pay for brand. They are expensive fans. But quiet and reliable. Definitely made the router under my desk quieter. Unlike some of the cheaper quiet fans, these guys will run for years and stay 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.

This fan is quiet, feels well built and works perfectly with my Jetson Nano kit.

This fan is quite and keeps the Nano from throttling back during extensive AI/DL, however the cable is way too long for a NVIDIA Nano and had to be bunched up between the Nano heat sink and the top of the SBC case.

Installed on a Jetson Nano. I had to buy M2.5 x 8mm screws / washers and nuts. Fan will not turn unless the tempature is high or you turn it on via a software command.

Works great!

Pretty silent cooler for Raspberry Pi tower. Main chip temperature can be reduced to 35 degrees.

Quieter then the Noctua 40x10mm fans and better air flow