Originally Posted by Trotter
Swapping a PSU is actually pretty easy. Each plug is unique. If nothing else, take a pic of each connection before you unplug it, and then match it back up with the new one.
Oh to add to Trotter, YOU WILL HAVE EXTRA CABLE.
Assuming you went with the 520hx, what you can do to make it easier, as its modular, meaning the cables unplug from the main box, you can keep the old psu in place, remove the hard drive cables one at a time and then plug the loose new cable back in.
Once all the cables are swapped, remove the old psu, plop in the new, and finish pluging in the power cables..
My mother switched a psu, so you can too.