3GB limit in XP? Go to Microsoft’s websites to find something else.
From Microsoft:
This shows the limit of the 32bit versions at 4GB.
http://msdn.microsoft.com/en-us/library/aa366778.aspx
You can also do some 4-Gigabyte Tuning to utilize all 4GB of memory.
http://msdn.microsoft.com/en-us/library/bb613473(VS.85).aspx
Memory Support and Windows Operating Systems
http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx
Operating Systems and PAE Support
http://www.microsoft.com/whdc/system/platform/server/PAE/pae_os.mspx
Physical Address Extension - PAE Memory and Windows
http://www.microsoft.com/whdc/system/platform/server/PAE/PAEdrv.mspx
From HP/Compaq:
Upgrading Memory Beyond Three Gigabytes (3GB) in Windows XP
TCC Shelbyville blog:
http://ttcshelbyville.wordpress.com/2008/07/01/3gb-barrier-fix-xp-and-vista/
Daniel Rodriguez