Question for the experts:

My E6600 does 3.2Ghz with ease with all voltages left at stock "Auto" (I just disabled Hyperthreading 3), with idle temps at 42C and load temps at 54C.

Despite its impressive overclockability to 3.2 Ghz at stock settings, I can't run stable at 3.6 Ghz even with the CPU VCore cranked up to 1.525V and the VMCH cranked up to 1.65V. Its actually a bit more stable when I leave the VMCH on Auto, although not much. Temps at these voltages increase to 54C at idle and 70C at load.

I can't believe there is no more headroom in this CPU over what it can do with stock voltages! Anybody have any similar experiences? Suggestions?