Quote Originally Posted by WizardofOz View Post
Many on this forum have posted data about their OC'g efforts. Personally I have collected the data and used it to make my next Q6600 purchasing decision. The data shows that Batch# with low VID require less voltage at 3.6GHz any higher it does nor scale linearly as you have shown with your E6600 and Q6600 examples (this may just be the limit of the C2D design), so if I was in the market for a new Q6600 and wanted one that would run at 3.6GHz with the least voltage requirements then I would certainly choose a processor with a low VID value.
You're correct in a way.

Volate ID sets the reference voltage across the power land VCC which supplies the core voltage to the processors (measured across VCC_SENSE and VSS_SENSE). All this controls is the performance profile of the processor, so a lower working VID will have a lower TDP than a higher. Amps required (Icc) may also be lower with lower VID CPU's, so they do run cooler/lower power/lower TDP than one with a higher VID at the same frequency/amps per core/bus speed. That's why they're better. 0.85VID is the lowest and 1.6VID is the highest possible.

But they can run cool with a low VID at stock and still be bad oc'ers and so people tend to look at Batch/Wafer to "estimate" the oc potential. The two combined help potential customers.