My current 24/7 speed for my Wolfdale is 4600mhz at 1.47v on its own massive water loop. I can bench at 4800 at 1.625v I just finished a run of Orthos small FFT at 4510mhz which needed 1.50v but could run all day long and my temps never even got into the 50s though this Computer room is rather chilly. I have been running this Wolf at 4500+ now for about a month with no signs of electro migration break down yet. Really incredible little chip for the money.