Unlikely. Just see current 32nm Gulftown and Clarkdale chips (1.4V) vs old 45nm Bloomfields (1.55V). I suppose it's around 1.4V for SB, too. They will eventually release a datasheet, though.
For Gulftown:
http://img.i4memory.info/reviewimage...te_minmax2.png
For Clarkdale:
http://www.overclockers.com/forums/a...1&d=1267198378