Read the table I linked. No, MS did not make a decision not to support more
than 4GB in Vista. No 32bit Windows clients support more than 4GB, XP
included. Windows Server 2003 Standard Edition and Windows Home Server
don't either. Higher 32bit editions of Windows 2003 and 2008 do so through
PAE.

"dennis" wrote in message
...
Colin Barnhorst wrote:
32bit operating systems cannot address more than 4GB of memory. It is
simple math. Two to the 32nd power is 4GB. That's all the unique
addresses you get mathematically. To use your full 8GB of memory you
need to run a 64bit version of Windows XP or Vista, or a 32bit version of
Windows Server 2003 Enterprise Edition or higher.

It is not because 32bit systems cannot address more, as you also mention
Windows 2003 can do it, Microsoft just made a choice to not support more
than 4G in Vista.