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

This is a fantastic fan to use when modding your dreamcast. I am so pleased with this fan choice. Its super quiet, installs easily (with 3d printed mount) and was simple to rewire to the dreamcast connector.

works well with my Lorex camera system

This replaced the OEM fan that came with my Deeper Network (DPR Miner/VPN)

The fan is quieter than a typical cheap fan you can find online. However, it doesnt seem to be as quiet as I would expect for a fan from Noctua especially at this price point. However, this being a 5V fan, it does work quite nicely off USB power (adapter required).

First Noctua fan that I planned to use with a Raspberry Pi project. Lasted maybe a day or two before a bearing went out and it started making a horrible grinding noise and then eventually died.

I love these fans and have replaced all of my Pi 4 fans with these. I just wish they made them smaller so I didnt have to make my own case. Ive lost cut a new top to fit these larger fans and it dropped my CPU temp about 10 degrees from the stock Canakit fan, and much quiet.

The best. Period.

Used for an old AMD modder trick. Mounted to the backside of the motherboard blowing on the bottom of the cpu socket to reduce the cpu temps.

Its quiet and does what its advertised to do. What more can you ask than that?

I used one of these to replace the noisy fan in my Q-See DVR that I bought at Costco. This one is much quieter but not totally silent. Id say it is probably about half as loud as the original, so it is well worth it. Comes with every imaginable connector to adapt to whatever you have, which is nice. On a Q-See DVR, you will not need any of those adapters.