SATA Power Adapter
Serial ATA hard drives don't use the standard 4-pin power connector that most devices do. So, unless you have a special power supply, you'll need to pick one of these up if you're buying a SATA hard drive.
This LP4 to SATA power adapter cable (6in) features one LP4 male connector and one male SATA power connector
List Price: $4.99
You Save: $2.00 (40%)