I am surprised that nobody else has mentioned this, but I think the Dual 2.5 is just an overclocked 2.0. Why else would they use liquid cooling? When they went down to a 90nm process, it also reduced heat. That's why the xserve G5 2.0 @ 90nm consummed fewer watts than the 130nm 2.0 in the last generation G5 desktop. So i think that they overclocked the G5 up to 2.5 using 90nm technology, and then were forced to liquid cool the steaming monster. It's kinda funny that Steve Jobs said that they're improving in speed better than Intel at the developers conference, considering the fact that IBM has only changed their process to 90nm and apple has overclocked a 2.0. If you look at the picture from this angle, IBM hasn't made any speed improvements The new P4's run quite cool even amongst preformance increases. Oh well, I still think i'd be awesome to liquid cool a G5. They should have added flourecent lights and stuff though. Too bad they don't sell an upgrade kit for those running 1.6/1.8/2.0 ...after all, it's just an added feature (non-nessesary) to the top-end powermac, right Don't get me wrong though... I understand that the G5 rocks the P4 (in specific instances).