kuroyume0161; Ummm, if I'm not mistaken, the 3 gigabyte memory addressing range is all you are going to see. It's the 32 bit addressing limit, remember? The -only- way a service pack could get around that limitation is to split the banks and set up some kind of independant soft switch memory manager...effectively not addressing 4 gig, but 2 banks of 2 gig each, and using the direct addressing for above the 2 gig mark for bank selection. Just like they did in the old, old days. Linux has that built into it at compile time; hopefully MS did its homework so we don't have another go around of addressing failures like was seen in Win 3.0........