i have a gigabyte gtx 590 and i modify the voltage with nibitor but the voltage not change to both of gpu's as you can see to the screen..
http://i229.photobucket.com/albums/ee52/vagenrider/Desktop_2013_02_20_20_54_17_304_zps6e1a1d26.png
also look to the nibitor values..Is it wrong? or something else?
http://i229.photobucket.com/albums/ee52/vagenrider/Desktop_2013_02_20_20_56_42_892_zpscfacf46b.png