Max amount of memory supported with Win2k8 and Win2k8 R2

Here We Go ...

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Windows Server 2008 Maximum Memory Limits
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Windows Server 2008 x86

• Windows Server 2008 STD Edition supports a maximum of 4 GB of memory
• Windows Server 2008 EE/DCE support a maximum of 64GB of memory

Windows Server 2008 x64 with or without Hyper-V Role Enabled

• Windows Server 2008 STD Edition supports a maximum of 32 GB of memory
• Windows Server 2008 EE/DCE support a maximum of 1 TB of memory

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Windows Server 2008 R2 Maximum Memory Limits
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Windows Server 2008 R2 x64 with Hyper-V Role Enabled

• Windows Server 2008 R2 STD support a maximum of 32 GB of memory
• Windows Server 2008 R2 EE/DCE support a maximum of 1 TB of memory

Windows Server 2008 R2 x64 without Hyper-V Role Enabled

• Windows Server 2008 R2 STD support a maximum of 32 GB of memory
• Windows Server 2008 R2 EE/DCE support a maximum of 2 TB of memory

So be aware that when you use Windows Server 2008 R2 with the Hyper-V role enabled the maximum supported RAM configuration is 1TB.