For some reason the 4gigs of RAM I got (see here: http://eshop.macsales.com/item/Other World Computing/53C4DDR2P4GB/) is showing up as 2.99 gigs inside of XP. Leopard shows it as 4. Windows XP is 32 BIT but with 4gigs that should not be a problem. I can't imagine Windows eating a gig either, I mean 1 entire gig is different from .10. Problem is I really need it for XP but rather then OSX to play Crysis. Thanks for any help!