The Home versions of Vista suffer from some stricter limitations on available main memory
and peer-to-peer networking than the non-Home versions. We’ll summarize these
limits as follows:
_ 32-bit Vista versions will always be limited to 4 GB of RAM, due to limitations of
x86 processors.
_ 64-bit Vista versions have dramatically different limitations in the various editions:
• Home Basic is limited to 8 GB or RAM.
• Home Premium is limited to 16 GB of RAM.
• Business, Enterprise, and Ultimate can access over 128 GB of RAM.