heres a MSI 460 HAWK bios that opens it up to 1.21v in NVI use ab for the rest all the way up to a card frying 1.35v+ if you want.
I'd keep it under 1.25v for benching more if you want at your own risk thuo...
all else in bios is same as stock.
http://www.easy-share.com/1912531736/msi460hawk121