I actually did just throw my main drive in to the new build with an install of windows 8.1 already on it, just to save time. Everything worked for the most part, some games would crash but I had the system lock up 2 times in about a 4 hours span. So then I reinstalled windows from scratch. I'm actually still getting all my programs and things installed now but I am still hitting 100% usage when in games. I have only tried Bad Company 2 and CS:GO since the fresh install, but still 100% load.