It all depends on the type of CPU you have! Is it a T'bred A, T'bred B, Barton, Mobile? The mobiles are the best overclockers. I have a XP2600+ mobile running on my Abit NF7-S Rev 2.0 (wife's machine) 24/7 @ 270*10.5 = 2.83Ghz. But then you need to have memory that can match that high FSB and also cooling to tame all the heat being generated.