Rasp pi 4 › Forums › General Discussion › Raspberry Pi model 4 thermal improvements › Rasp pi 4 6 December 2019 at 9:27 pm #581734 Terry McKnightParticipant I have a Pi2 and a Pi4. The latter I fitted with a fan on the processor. It runs cool but over time the fan has become noisier. Not obtrusive but a gentle hum.
