I dont know why and how this alwyas happens to people, most people say you need to reformat when geting a new mobo/cpu, that NEVER happens, and as long as you uninstall the mobo drivers or install the new ones before putting the nw mobo in i have never had to reinstall windows either, the only time i didn;t change drivers i did have to reinstall windows, so i asumme it was from that but who knows, my windows installation was pretty bad then anyways.
i have changed mobo/cpu comboinations 8 times i can count. and ram should not be a problem at all.