A mini UPS with 5V, 9V, 12V DC output and optional PoE can be used to power a WiFi access point, a broadband router, an SBC, ...
As the ATX PSU standard moved from the old 1.x revisions into the current 2.x revision range, the -5V rail was removed, and the -12V rail made optional. The ATX power connector with the mainboard ...
Some thermal imagery shared on Twitter/X underlines how toasty-hot power connectors servicing Nvidia GeForce RTX 5090 graphics cards can get.