Electrical usually works at 100%. It's built that way. A light bulb does it, even your car, when you start it, works with full hp. Nothing to worry about.
Thinking about getting my system higher, I thought about SLI, I have a 560 GTX Titan, my mobo is capable of SLI, but I I started to ponder about... how much do I need it? 99% of my work is standard, I don't need that extra power! I tried to find a clue how to switch off one of cards, in a simple way, but couldn't find any. Other than "plug off", which isn't so very convenient.
Doobtetyfully.