Yeah that PSU will work. Haha its really not that hard. Its intimidating i guess if you have never done it before. What i did on my first time is just set the new one right beside the case as i unplugged the old one from every port. So each one id unplug from the old one, id take a port from the new one and plug it in right then and there so i wouldnt miss anything. Easier than it looks.