Review on 🌀 Efficient Cooling Solution: Argon Fan HAT for Raspberry Pi 4 Model B and Raspberry Pi 3 Model B – 40mm Fan with Power Button & Software Control by Deejay Allard

I bought it because of the price, possible cooling and the power switch. I have it in a Pishopian HighPi case. The configuration software can be downloaded via curl and installed via bash. Contrary to what another reviewer said, the controller software (at the time of this review) only allows 3 head/fan speed configurations [vs. 4] (your choice). I can't say how good the cooling system is yet (my Pi4 runs 1750-1900 anyway) - haven't tested the combo yet. It cleans all the small radiators I have. Only time will tell if the fan will hold up, which is the norm. Right now it only gets a 4 out of 5 because: 1) The fan isn't overly loud, but it's definitely audible if you sit next to it when it kicks in (and only gets louder as the speed picks up. If you turn it all the way up quiet want environment, that could be wrong). 2) Like the power button, works great if you do NOT have a cover on the case. I drilled a hole in the top of the HighPi just above the button. I don't have a 3D printer, but if I did I would make a hammer-like flat head that fits into a hole that could be used to press the power button with the case cover.