Originally Posted by Rasparthe
I think the 'mod' that Mike was talking about, if that is the one your referring to, is that many of the P45 (the UD3P, for example) severely limit the Vcore in the BIOS for P4 and Celeron chips. They get limited to 1.4v for some reason that I've never really heard a clear explanation on. You can mod the actual processor using BSEL pin mods to bypass this. The problem is limited to certain boards and only the older single core 775 stuff, but they work impressively for Core2 family.
I have the ASUS P5B Deluxe and I've used a P4 520 and don't have a 1.4v limitation. Are you talking about something else?