Monoprice 101253 6inch SATA 15-Pin Female to Molex 4-Pin Male Power Adapter Got a new SATA drive that you need to connect to a system with an older power supply? Here's a solution. This is an adapter is for connecting internal storage devices that require 15 pin SATA power connectors to Power supplies that only have 4 pin Molex power connectors. i. e. YOUR DRIVE IS A NEWER SATA BUT YOUR COMPUTER IS AN OLDER ONE WITH MOLEX. Warning: Molex connector provide 12V and 5V power lines but not 3. 3V required by some SATA drives. Make sure your drive does not require a 3. 3V power connection before purchasing this adapter.