Have tried to give my 3 GTX280's some more juice with softmod on rivatuner. All cards are recognises, my GTX's are on sd0 sd1 and sd3 (9600 gt for physx on sd2) I can change voltages for card 1 and 2 (sd0 and sd1) When i poll sd3 all values are 'invalid' Have tried sd up to 15, all recognize the G200 but all give invalid values. Is there a way to change the voltage for the 3rd GTX ? Is this because rivatuner only support 3 slots ? Has it something to do with Classified build (other irq's) ? Hope there is a solution for this.