Which is the best fan for the NVIDIA Jetson Nano?
Both the NF-A4x20 5V PWM and NF-A4x10 5V PWM are great choices for upgrading the cooling of NVIDIA’s Jetson Nano Developer Kit. The NF-A4x20 5V PWM provides slightly better performance and is officially recommended by NVIDIA. Being slightly smaller (40x40x10mm instead of 40x40x20mm) the NF-A4x10 5V PWM is an excellent choice for more compact cases that can not fit 20mm thick fans. A 3D printed mesh case design that fits the NF-A4x20 can be found here.
Both models support PWM based speed control and can be connected directly to the 4-pin PWM fan header on the Jetson Nano Developer Kit, no adaptors are required. As the Jetson Nano provides 5V, please make sure to purchase the 5V PWM versions of the fans. The regular 12V PWM versions will not work. For a tutorial on how to set up PWM based fan control, please see this thread.
The mounting holes of the NF-A4x20 5V PWM and NF-A4x10 5V PWM align with the holes in the heatsink of the NVIDIA Jetson Nano Developer Kit. Please note that the holes of the heatsink are 2.5mm diameter and not threaded, so you can either use self-tapping M3 screws or regular M2 or M2.5 screws with nuts for mounting the fan to the heatsink. As it is not easy to hold the nuts in place, we recommend using self-tapping M3 screws, but please note that there can be aluminium shavings from tapping the thread, so make sure to clean off all shavings from the motherboard using canned air or a vacuum cleaner in order to avoid short-circuits. We recommend 15mm long screws for installing the NF-A4x10 and 25mm long screws for installing the NF-A4x20.
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