This is the ATX 24 - Pin Power Supply Extension Cable - 12 Inch While many connectors carry power in addition to data, some connectors are used specifically to provide power connections to devices. Most computer hard drives, optical drives, and other internal peripherals get power through what is typically called a “Molex” connector. Molex connectors are designed to carry a lot of current: up to 11A per pin. Using this cable allows you to upgrade without having to buy a new power supply. This 12 inch cable is designed with high-quality materials that allow for the best electrical conductivity. With ATX Power 24-Pin Male and Female connectors, you can easily extend your power to meet any length needed. For more information on our products please contact our customer service department at 888-519-9505 For all your cable and connector needs choose Show Me Cables.