Ulrick28

I am running an Intel P4 660 With 4 gigs of DDR2 533 memory. The problem I am having is that Windows x64 is showing 3 gigs. I thought one of the advantages of windows 64 was the ability to have more ram available (I realize that in Windows XP Pro 32bit a lot of hardare assigned itself between the 3 gig and 4 gig space). Is this still true for XP x64 as well? It's painful knowing I have a full gig of ram I can't use....