Hello, I am running XP SP3 and am looking to overclock it. I have read several places that the 8800gs can hit clock speeds of 600/800. Apple has clocked this thing at less than half of that. I have used rivatuner and ATI tool trying to get it to overclock with the latest drivers from laptopvideo2go. If you find a driver that is overclockable, please post the version number here. Lets see what this thing can do!