Oldfart:
It seems to be stable at 1.75v - I am running at 1.8v just to be safe. I have tried running it at 1000MHz and it seemed stable in Windows. However, when I loaded up UT, it crashed pretty quickly. Mind you, I did have the memory set at 2,2,2 - so, it is possible that I might still hit 1000MHz with this CPU. I'll likely play around with it once I have more free time (i.e., once my says its OK to waste an afternoon... 😉)
Napalm