I'm thinkin of upgrading to an AMD Athlon64 3000 or 3200+. I'm planning to use the same hdd i hv now, which is a seagate barracuda 160gb. Will I be able to directly boot into XP as soon as the new mobo and processor are connected, or will I have to reinstall XP? Why I'm asking is, when I went to get this harddisk, I took my old hdd along to copy stuff from that, and when I connected that to my comp guy's comp, it refused to boot up with that configuration...makes me wonder if XP will boot only from the config with which it was installed??