Title explains most of it. I was asked if plugging BOTH the molex and SATA power cables into a SATA HDD with both types of connections would do any harm, I said plugging both in would likely cause enough of a zap to destroy the data on the HDD, if not kill the HDD due to too much voltage being fed to it. Somebody I don't even know then butted in saying nothing would happen, an I was like voltage dude, voltage! So to try and settle this once and for all, does anyone have a SATA HDD with both SATA and molex power connections or knowns in general what may happen. The HDD in question is a Western Digital.