- 3.6 at 1.175v allegedly is stable for some people, 1.2 should be ok
- 3.9 at 1.3125v is allegedly ok if you are lucky 1.33 should be ok
- 3.0 at 0.95v is pretty definately fine?
So tweaking on the safe side of those figures should be fine.
Feel free to add your findings for downclocking figures for this 8 core processor that is preset to run like a hoover.