Depends mostly on the CPU “TDP” (even tho nowadays the TDP is not an actual power limit) and size of heatsink, check out Streacom passive cases for example.

But the essential part in a pc is the heatsink, before the cpu fan (or any fan).

Fast Seedvault offline backups. Say you’re traveling and wanna backup your phone to a fast usb ssd, or you need to transfer everything to another phone without Internet