FriendlyElec Heat Sink for NanoPi M4/M4V2 Single Board Computer

Love this heat sink. However, for it to work well, it needs some air flow. While running with the heatsink on, the board temp rapidly went up to 45°C. With a fan blowing over it, it went down to around 33°C. So active airflow is a must... and it is very efficient, once it gets airflow.Side note, There are some through hole part pins on the Nano Pi M4, which extends fairly close to the heatsink. I would take a pair of clippers to shorten them to avoid shorts.

Pro: - Giant aluminum heatsink - Comes with case top plate which I did not expect. Bonus :)Cons: - Transport damage or reused item: note how the aluminum plate has a very visible scratch - Screws left indentations in the thermal patch, see image - Faceplate looked dirty/used. Might be a sign of a used product or simply a cosmetic defect. I don't care but I am mentioning it for those who might.Temperatures are ok, so I am thinking of just keeping this unit, just wondering how much better it would cool if it hadn't been damaged

Gets the job done well.