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

Looked up the wiring diagram on Noctua to make sure I had it right, looked up an easy little PWM can script, and fired right up. Only had to plug it into 5V, Ground, and the PWM pin set in the script. Works awesome, and its the same price as the non-PWM fan. Its almost silent if youre right by it. If your more than a few feet away you wont hear it on high.

For this tiny size, these are amazingly quiet and effective. Really a marvel.

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

As it was advertised

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

noctua needs to fix the issue with 5v not being compatible with 12v pin headers.

I bought this for my NVidia Jetson Nano because it was recommended by the Geekworm case I bought.

I bought two of these little gems with the intent of installing them to cool a pair of NVMe drives. Instead I created a bracket to mount both to place on the front end of an Sapphire RX580 Nitro. I set the fan speed to the lowest setting in BIOS and now the main GPU fans never come on. Temps are always in the mid 20c. Now I have to buy two more for the NVMe drives.

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.

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.