An intel rep came on the forum many months ago when QX9650 first came out. He suggested slow increase in voltages, running TAT or similar, for break-in. Huge jumps in voltage aren't a good idea...even 1.25v to 1.35v is a bit much...I have followed this and even after running IBT for a week @ 90c, I've noticed absolutely no degredation, and if anything, temps have dropped a few degrees.