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

Fits my 3d printed case perfect, also tested with market cases - fits in all standard Pi size cases.

replace my dreamcast fan with this one works pretty good.

Its definitely quite, using it currently for my Valve Index and it you can barely hear it. Does improve the heat dissipation from the headset quite well as it takes more ore less 1.5-2.0x longer (FOR ME) to have to take it off for being too hot.

I originally had a Canakit case for my Raspberry Pi 4 Model B 4GB with the Canakit 30mm Fan. I wanted to mess around and overclocked the RPi from its base 1.5GHz to 2GHz but in order to do so I needed the max overvoltage applied which was level 6 which adds 0.15V I believe to the SoC. When testing the CPU under load using sysbench the 30mm fan would need to be at 5V and would be loud and nearly reach 80C which is near throttling temperature for the CPU. at 3.3V I couldnt hear the fan but it would throttle.

Super quiet with a lot of wiring options. Noctua quality, always worth the extra

Have a Prusa printer with NF-A4x10 5v fan on it and it stopped working after 4 months. Tried contacting the customer support to [email protected] except my emails kept bouncing back. This is 100% the correct email, as even put in a ticket on the webpage and got an email from [email protected] which I tried replying and that email got bounced back. So, I just ordered another on Amazon and installed it. Really frustrating customer service as I get weekly emails from noctua support asking to hear back about my ticket but all my emails bounce. Tried to notify them of this problem by contacting them via the webpage again with a reference to the Ticket # but there was no reply. So, I took it even one step further and forward my email to another email address Google to Yahoo and their email still bounced. I believe they forward their emails through freshdesk which is causing the problems.

Added to a raspberry pi 4 Kodi box. I cant even hear it over the normal room noise even sitting right beside it.

I bought this to install in a musical synthesizer, so noise—both mechanical and electronic—were of great concern to me. This fans seems to deliver on both fronts. Mechanically, the fan is whisper quiet. Its not silent—no fan is—but it is certainly not going to be heard on any of the mics in my studio. Electrically, I actually cannot hear any hum or noise in the output of my synth; it sound exactly the same whether the fan is plugged in or not. This is nothing short of miraculous, and saves me a lot of trouble working up a filter.

Highest quality. Definitely worth the extra cost for Noctura products. The packaging and accessory installation options included are great! Fan is very quiet and moves a good amount of air. I purchased two of these to replace a CPU and case fan for a DVR.

Good quality