I want to overvolt but... (9600 gt)

I have had a 9600gt for several years and I have been wanting a little more from it lately. It has been running with absolutely no problems and I can OC it to: Core 775, Memory 1000, Shader 1900. After that It has artifacts in Furmark Burn in tests but has no heat problems. I want to over-volt it to see how far I can OC this card.
I found a neat guide here: (http://www.techpowerup.com/articles/overclocking/vidcard/150/2) of how to over-volt my card.
The setup of my card is consistent with the picture in the guide for a 1.15V setup, however nVidia inspector and my multimeter both display 1.10V.
So I am confused as to what I need to do to overvolt my card. Can I? Or is it a lost cause?

According to the link, you have to solder in a resistor on VID5 to get 1.15v. You did this?

Well my card already had a resistor there from the box and still shows 1.10v so I was thinking that EVGA just did something very different from the reference card.
It is this card here (http://www.techpowerup.com/articles/overclocking/vidcard/150/2) It is not too important that I am able to overvolt it I just thought It would be fun to push it till I got my next card.