PATA specified that power is transmitted using a 4 pin Molex connector. With SATA, this connector. The 4 pin Molex connector has also been used to power floppy drives. SATA changed this connector. With SATA, the power connector and the data connector look similar, but the power connector is wider than the data connector. The standard power connector has 15 pins. It is used for standard 3.5 inch and 2.5 inch drives.