In all honesty, I would get your processor idle temp below 45 before you try any kind of overclock at all. 2618 mhz is my maximum stable overclock on the Barton core, but my multiplier is locked on the current CPU so that was an FSB overclock only (238). This required a core voltage of 1.9 volts to keep stability; I would not recommend higher voltages than 1.7/1.8 without good water/pelt/VPC cooling.