There are drive pwr connectors and Mobo power connectors in a PC.
Drive power conns are stdized in size, shape, placement and the voltage carried through their wires.
- Peripheral conns, (Molex typically conn HDDs and CD/DVDs to the PS (see left).
- Floppy conns (BERG, mini-Molex) conn are smaller
- Serial ATA (the new version of IDE) are the third kind. (See right).