All things being equal, the philly chips should have the same potential to overclock as malay chips, but I haven't done enough research on the issue to really be sure. There seems to be a lot of divisiveness on the matter. The most intelligent thing I can say is that your chip has a chance of being able to overclock well, just as any chip does. Malaysian chips are rumored to be the best overclockers, but I wouldn't use it as a rule of thumb; there have been numerous successful o/cs with philly chips too. All this is making me want a philly cheesesteak. Mmm. Anyway I have heard some horror stories about philly chips as well as success stories.