Heh, I lowered the PLL voltage back to 1.55 and it crashed within minutes, just as I was typing a reply here in fact.. So I've jacked it back up to 1.75v.. Is the PLL chip the one on the motherboard that SetFSB asks you to identify, or a chip on the processor?

And one more thing, would lowering the PLL and jacking up the vcore produce the same result? Can either compensate for another? I'd try but I don't have water cooling and it's already touching 70deg on the warmest core folding..