Little details for the Overclockers preparing their Core i7 stuffs ...
I got many questions about the QPI voltage.
This voltage inclused memory controler and QPI voltage. The default is usually around 1.15v. You got to understand that different technologies are used in this area, that means the power to voltage ratio is different.
you ll see that over 1.3Volts, you will not get much more room for clocking up air cooled. if you stay at 1.22Volts, you can archive already very high speed memory.
Notice that the QPI voltage is shared with the cache, when increasing this voltage, you increase massively the power, due to the number of transistors you are over volting. nothing wrong in the design, it is just the transistor count that is big on this parameter.

Enjoy the fun! and get ready.

thanks for sticking to the NDA ... remember, even the date is under NDA ;-)