Windows XP - How much Ram can it Recognize

[cgilmore]

How much ram can XP Pro Recognize? More than 3Gb or can it take 4 and up?

 

[bsobel]

32bit versions can recogonize upto 4gig, but with many mother boards your usefull amount will be less than this. The 64bit versions can use above 4gig (16gig for XP pro 64 I think, but would have to go double check)

 

[spyordie007]

Actually XP Pro x64 can support up to 128GB of RAM and 16TB of virtual memory:
http://www.microsoft.com/windowsxp/64bit/evaluation/overviews/overview.mspx

 

[ktwebb]

The Intel /pae switch extension in the boot.ini is supported under 32 bit XP installations, including home I believe.

All this does is expand the number of bits that can be used by physical memory addresses. This would allow the OS to recognize up to 64GB of physical memory.

 

[bsobel]

Originally posted by: ktwebb
The Intel /pae switch extension in the boot.ini is supported under 32 bit XP installations, including home I believe. All this does is expand the number of bits that can be used by physical memory addresses. This would allow the OS to recognize up to 64GB of physical memory.

Thats really only usefull for appliations written to support AWE, which are few if any on the desktop platforms.