HI guys i am unable to increase the voltages for my 4870 x2 using rivatuner. I am using a reference gpu. The more button at the bottom left is blanked out.

I'll post the pictures




I open riva tuner it's the latest 2.2.4



Mine does not have the VRM instead it's called something else here:




I right click on it and enter setup:




This is what i'm talking about u see, the more at the bottom left is blanked out