This is a mod I did to an Epox nForce board I believe, can't even remember any more.... I do remember I got 939 Winchester up to like 3.4ghz on air with this mod, lolz.
naw its more along the line that mobo man's have figured out were gonna push it so why not support it without having to modify the board in such a way. so now they allow for voltage changes to a larger degree in bios.