5812MHz @ 2.024V -125C (QX9650, L744B156, C0). 3DMark 06 cpu test. With Rampage Formula.
One thing is for sure, they scale with voltage. But the leakage gets crazy, so running the cpu like this without paying attention to temps and stressing it too much will hurt the cpu. And you need a high-end pot like F1 Extreme :)

