Power Supplies for Your Homelab: 80+ Efficiency, Redundant PSUs, and Server PSU Quirks
Every build guide tells you to “get a good power supply” and leaves it there, as if that settles the question. It doesn’t. A PSU is the one component that touches every watt your homelab ever draws, and the difference between a cheap unit and a good one shows up as heat, noise, and a power bill you can actually measure, not just a line on a spec sheet. This is the PSU side of the picture: what the efficiency ratings mean, how server PSUs differ from the ATX unit in a tower build, and what redundant power supplies actually buy you once you start running used enterprise gear. ...