“The official cooler works very well. I have fitted it in place of the official cooling case so that I could fit the NVMe adapter below the PI. So far I have not seen the temperature of the CPU rise to over 50C, although I've not really stretched it yet”
“Low profile and only turns on when deemed necessary. On first boot up you can definitely hear it until boot complete. After running I don’t hear it at all. While doing temperature checks with sensors below and above, it even cools off the HAT I have attached over it. Would definitely recommend for every Rpi5”