There have been multiple different revisions of the ATX power supply standard over the years ... the wiring loom of motherboard and disk power connectors, a handy source of medium-sized hook ...

With the ATX standard also came the ATX power supply (PSU), the standard for which ... the new 12 VSB standby voltage rail. The 4-pin 12 V connectors would still remain, and still require one ...

The power supply blows air over the CPU ... but to place all the connectors directly on the motherboard. Prior to the ATX, only the keyboard connector was attached to the motherboard.