power supply - What are all the multiple pins on PSU connectors for? How does a 24-pin MB connector work exactly? - Electrical Engineering Stack Exchange
Adapter Cable Motherboard Hot Sale E-atx 20 Pin Female To 24 Pin Male F/m Power Supply - Pc Hardware Cables & Adapters - AliExpress
voltage - In an ATX power supply, how is the -12V supply made? - Electrical Engineering Stack Exchange
Convert ATX PSU to Bench Supply to Power Circuits
PC power supply cables and connectors
Why is -12V needed on an ATX power supply - Super User
All about the various PC power supply cables and connectors