I've had at a 40mm noctua usb fan running off rpi4 usb port for years. It's big enough to be very quiet even though it is running flat out. One is rested on top of one of those "sticklebrick" metal cases. The other used to blow straight onto a bare rpi4 board. There's nothing you can do to an rpi4 with one of those fans that will even approach throttling (less than 40c max iirc).
Statistics: Posted by swampdog — Wed Aug 21, 2024 10:45 pm