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Memory Limits for Windows Releases

Memory, Operating System
Version

Limit on
x64

Limit on
IA64
Windows Server 2008 R2 Datacenter

2 TB

 
Windows Server 2008 R2 Enterprise

2 TB

 
Windows Server 2008 R2 for Itanium-Based Systems  

2 TB

Windows Server 2008 R2 Foundation

8 GB

 
Windows Server 2008 R2 Standard

32 GB

 
Windows HPC Server 2008 R2

128 GB

 
Windows Web Server 2008 R2

32 GB

 

These and ALL MSFT memory limits including ALL server releases can be found at the following:

http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778%28v=vs.85%29.aspx#physical_memory_l...