After a few upgrades on my own systems, i have found that the only time you
need to re-install windows is if you change a major component like the
mother board or hard drive that the orriginal copy of windows is on, most
other changes in hard ware do not justify a re-install, just a xhange in
driver setup, so there for up-ing the proccessor you dont need to to
reinstall, but cos your installing a fx processor you will need to install
ecc ram as thats what an fx processor requires after a lengthy convo with
amd support a while ago