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The maximum memory that Windows XP will use in total is 3.25GB. There is no fundamental 4GB limit for memory in 32 bit operating systems - Windows Server 2003 can use more than 4GB. The key limit that defines a 32-bit system is per-process (the virtual address space for one particular application).
- Should I Use Windows 7 64-Bit Or 32-Bit in This Situation
My notebook is Satellite A100, which supports RAM...
- Should I Use Windows 7 64-Bit Or 32-Bit in This Situation
I have Xp Pro x32 with 4Gb installed. My Xp says I have 3.43Gb. I have seen some only recognize 3.32Gb. Much of this is dependent on whether your graphics are integrated or card. The link below will give you the ram limits for all Windows OS. http://msdn.microsoft.com/en-us/library/aa366778%28v=vs.85%29.aspx#physical_memory_limits_windows_xp
XP can run on 64 MB RAM. Win7 is more bloated, but if you cut out the Aero graphic effects and reduce unnecessary background processes then 7 can run fairly lean. If you go up to 8 GB RAM it won't do anything for XP.
The maximum amount of memory that can be supported on Windows XP Professional and Windows Server 2003 is also 4 GB. However, Windows Server 2003, Enterprise Edition supports 32 GB of physical RAM and Windows Server 2003, Datacenter Edition supports 64 GB of physical RAM using the PAE feature."
Although the theoretical memory limit of a 64-bit computer is about 16 exabytes (17.1 billion gigabytes), Windows XP x64 is limited to 128 GB of physical memory and 16 terabytes of virtual memory. [ 4 ]
All 32-bit client versions of Windows (not just XP/Vista/7/8) have a 4GB address space (64-bit versions can use much more). That's the theoretical upper limit beyond which you can not go. But you can't use the entire address space. Even though you have a 4GB address space, you can only use around 3.1GB of RAM. That's
Here's how to enable more than 4GB RAM on 32-bit versions of Windows XP... only tried this on XP Professional SP3. YMMV So that's how I got XP to see all 16GB on my Optiplex 5040. There are instructions in the 7z archive. Download here.
