Bingo,
Could you please find out a table of values for what QPI PLL voltage is set when a CPU PLL voltage is selected on the Rampage 3 Extreme?
Example:
1.36v = x.xv QPI
1.81v = 1.1v QPI(assumed)
1.82v = x.xv QPI
1.84v = x.xv QPI
etc.

I asked ASUS support for this information and got a very bad reply:
Dear Valued Customer,

Thank you for contacting ASUS Customer Service.

I am afraid to say that I am not allowed to give this kind of value.
I think you can operate according to the spec and manual of your CPU.
Or contact with Intel for consultation.
Sorry for the inconvenience.
Please contact with me if you have any other questions.

Best Regards,

Stacey

ASUS Customer Service
This is a key overclocking value and we need to know this information to prevent providing too much voltage to QPI PLL!!!
If you could supply the full table of values or a method of calculating the values all the way from 1.2 to 2.0v it would be excellent.
Thanks!