I OC'd my 2.4ghz Processor along time ago to 3.0ghz 1ghz FSB, well 2 months ago. Perfectly fine, I got a mutant mods fan to cool it and does it well, always in the 20's and not hot. And I got a 300Watt PS, But upgrading soon to a 600Watt PS Ocz Soon. But could my max be 4.0Ghz Tops? or near to that? I got a P4S800 mobo to.