Ok first of all. His computer doesn't have 100gig of ram and he or I never said that, it has 24. Secondly, you really need to open your mind to the possibilty that you DON'T know about all the hardware there is in the world and what it can do. I'm not saying that desktop's could hold that much but it is definetily possible in a larger set-up. XP 64bit wouldn't be made with these sorts of capabilities for no reason. http://msdn.microsoft.com/en-us/library/aa366778(VS.85).aspx#physical_memory_limits_windows_xp