Ok radaja, I think what you are looking for are tables like these --

EdgeOfStability - CPU & NB GTL Default Settings
Anandtech review of DFI UT P35-T2R - page 12: Quad-core CPU VTT/GTL Tables (do continue to read pp.13 & pp.14)

HOWEVER, the figures of those tables were sampled from just a couple of boards back then. Keep in mind that your voltages may vary! That's why it's always recommended that you measure your own board to get a much better idea. Although, those tables should serve a good starting point for you, who come from a different calculation methodology. And do study what the BIOS settings translate into as they don't mean direct % or absolute voltage values. There will be a lot of try and error so you need to be a little persistent to master your own board. Good luck.