“The Pi4 needs a heat sink if it it to run at full power. I didn't want a fan based solution as that's noisy, takes up space and is susceptable to mechanical failure. Using the case as it's own heatsink is therefore the obvious solution. This case is the most effective passive cooling solution I've found, with the pi reaching a maximum of 60degrees whatever I throw at it (the pi starts speed throttling at 80degrees, so 60 is a very safe number) - no need of a fan unless you're into serious over-clocking! This case doesn't fully enclose the pi, like others do, but gives free access to the GPIO pins and allows airflow around the USB connectors (some USB memory sticks get VERY hot themselves). If you want a fully enclosed case there are others out there, but if you want the best passive cooling performance then I would suggest that this is the one for you :-).”
“Nice looking case, seems to do a good job at cooling passively. Instructions don’t fully match the package contents (they ask for one heat pad to be installed but several are shipped), but still easy to follow. Tolerances seem a bit tight for some of the cut outs but doesn’t prevent use.”