Physical Memory Limits: Windows 7
The following table specifies the limits on physical memory for Windows 7.
| Version |
Limit in 32-bit Windows |
Limit in 64-bit Windows |
| Windows 7 Ultimate |
4 GB |
192 GB |
| Windows 7 Enterprise |
4 GB |
192 GB |
| Windows 7 Professional |
4 GB |
192 GB |
| Windows 7 Home Premium |
4 GB |
16 GB |
| Windows 7 Home Basic |
4 GB |
8 GB |
| Windows 7 Starter |
2 GB |
2 GB |
Physical Memory Limits: Windows Server 2008 R2
The following table specifies the limits on physical memory for Windows Server 2008 R2. Windows Server 2008 R2 is available only in 64-bit editions.
| Version |
Limit in 64-bit Windows |
| 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 |
Physical Memory Limits: Windows Server 2008
The following table specifies the limits on physical memory for Windows Server 2008. Limits greater than 4 GB for 32-bit Windows assume that PAE is enabled.
| Version |
Limit in 32-bit Windows |
Limit in 64-bit Windows |
| Windows Server 2008 Datacenter |
64 GB |
2 TB |
| Windows Server 2008 Enterprise |
64 GB |
2 TB |
| Windows Server 2008 HPC Edition |
Not applicable |
128 GB |
| Windows Server 2008 Standard |
4 GB |
32 GB |
| Windows Server 2008 for Itanium-Based Systems |
Not applicable |
2 TB |
| Windows Small Business Server 2008 |
4 GB |
32 GB |
| Windows Web Server 2008 |
4 GB |
32 GB |
I though its good to be know :)