Except that PAE is not enabled on Windows clients, only servers. PAE on a
client is only useful in dealing with certain device driver issues raised by
Data Execution Protection.
See the memory tables at:
http://msdn.microsoft.com/en-us/library/aa366778.aspx
Also, from
http://technet2.microsoft.com/windo...2454-4222-841a-c6d5aa1fc54c1033.mspx?mfr=true
"By default, servers running the 32-bit editions of Windows Server 2003,
Enterprise Edition, and Windows Server 2003, Datacenter Edition, support
only 32-bit memory addressing and thus are able to access only 4 gigabytes
(GB) of physical memory. However, hardware that offers much larger amounts
of physical memory is available. Both the operating system and many
applications can benefit from using this additional memory.
PAE X86 allows servers running Windows Server 2003, Enterprise Edition, and
Windows Server 2003, Datacenter Edition, on a 32-bit hardware platform to
access physical memory beyond 4 GB. To do this, PAE changes the memory
addressing from 32-bit addressing mode to 64-bit addressing mode, allowing
the operating system and high performance drivers and applications access to
the additional physical memory. When using the larger amount of physical
memory made available by PAE X86, operating system performance can be
increased, particularly when the server is hosting multiple applications.
Applications can also have direct access to the physical memory beyond 4 GB
provided they use the Address Windowing Extensions (AWE) API set."
