Ok, so i am switching over to intel from an AMD FX-8350, ASUS M5A99X EVO R2.0. Those are my current parts and I am getting an Intel i7-3770k, and a ASUS Z77 Sabertooth. I am wondering if i HAVE to do a fresh install of my OS and if there is any way to back-up my hard drive because i don't want to re download 600Gbs of stuff. Thanks in advance!