This adapter cable by C2G means that you can power your new motherboard by using your existing ATX power supply. It connects a 24-Pin ATX power supply to a 20-Pin ATX motherboard power connector. Many new ATX power supplies & cases ship with a 24-Pin power supply connector; use our new adapter cable to convert the power supply to use with standard 20-Pin ATX motherboards. Product Features Connectors: 24-Pin Motherboard Female to 20-Pin ATX Male