“Great addon to the RPI4. Keeps temps under control, with included heatsink for CPU. The only drawback, is the noise. There's a high pitch whine from the fan.”
“Noisy! in fact louder then all the fans combined in my threadripper case when I'm rendering (it may also be possible that my fan had a problem with it) It just seems to be either on at full revolutions or off (using their built in drivers) and if I use a case just seems to amplify the sound more.
But it does cool the pi... I moved to heat sinks...”