Power your internal sata hard drive from an lp4 molex connector on your power supply the sata18pow sata data and power cable features a combination 22 pin sata receptacle data and power connector as well as an molex lp4 power connector and sata receptacle data connector allowing you to create a conventional serial ata data connection to a computer while powering the drive through an lp4 connection to the computer power supply this high quality sata powerlp4 adapter cable measures 18in