Physical Memory Limits: Windows 7
The following table specifies the limits on physical memory for Windows 7.
Version
|
Limit on X86
|
Limit on X64
|
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
|
N/A
|
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 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
|
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 on X86
|
Limit on X64
|
Limit on IA64
|
Windows Server 2008 Datacenter
|
64 GB
|
1 TB
| |
Windows Server 2008 Enterprise
|
64 GB
|
1 TB
| |
Windows Server 2008 HPC Edition
|
128 GB
| ||
Windows Server 2008 Standard
|
4 GB
|
32 GB
| |
Windows Server 2008 for Itanium-Based Systems
|
2 TB
| ||
Windows Small Business Server 2008
|
4 GB
|
32 GB
| |
Windows Web Server 2008
|
4 GB
|
32 GB
|
Physical Memory Limits: Windows Vista
The following table specifies the limits on physical memory for Windows Vista.
Version
|
Limit on X86
|
Limit on X64
|
Windows Vista Ultimate
|
4 GB
|
128 GB
|
Windows Vista Enterprise
|
4 GB
|
128 GB
|
Windows Vista Business
|
4 GB
|
128 GB
|
Windows Vista Home Premium
|
4 GB
|
16 GB
|
Windows Vista Home Basic
|
4 GB
|
8 GB
|
Windows Vista Starter
|
1 GB
|
Physical Memory Limits: Windows Home Server
Windows Home Server is available only in a 32-bit edition. The physical memory limit is 4 GB.
Physical Memory Limits: Windows Server 2003 R2
The following table specifies the limits on physical memory for Windows Server 2003 R2. Limits over 4 GB for 32-bit Windows assume that PAE is enabled.
Version
|
Limit on X86
|
Limit on X64
|
Windows Server 2003 R2 Datacenter Edition
|
64 GB(16 GB with 4GT)
|
1 TB
|
Windows Server 2003 R2 Enterprise Edition
|
64 GB(16 GB with 4GT)
|
1 TB
|
Windows Server 2003 R2 Standard Edition
|
4 GB
|
32 GB
|
Physical Memory Limits: Windows Server 2003 with Service Pack 2 (SP2)
The following table specifies the limits on physical memory for Windows Server 2003 with Service Pack 2 (SP2). Limits over 4 GB for 32-bit Windows assume that PAE is enabled.
Version
|
Limit on X86
|
Limit on X64
|
Limit on IA64
|
Windows Server 2003 with Service Pack 2 (SP2), Datacenter Edition
|
64 GB
(16 GB with 4GT)
|
1 TB
|
2 TB
|
Windows Server 2003 with Service Pack 2 (SP2), Enterprise Edition
|
64 GB
|
1 TB
|
2 TB
|
Windows Server 2003 with Service Pack 2 (SP2), Standard Edition
|
4 GB
|
32 GB
|
Physical Memory Limits: Windows Server 2003 with Service Pack 1 (SP1)
The following table specifies the limits on physical memory for Windows Server 2003 with Service Pack 1 (SP1). Limits over 4 GB for 32-bit Windows assume that PAE is enabled.
Version
|
Limit on X86
|
Limit on X64
|
Limit on IA64
|
Windows Server 2003 with Service Pack 1 (SP1), Datacenter Edition
|
64 GB(16 GB with 4GT)
|
X64 1 TB
|
1 TB
|
Windows Server 2003 with Service Pack 1 (SP1), Enterprise Edition
|
64 GB(16 GB with 4GT)
|
X64 1 TB
|
1 TB
|
Windows Server 2003 with Service Pack 1 (SP1), Standard Edition
|
4 GB
|
32 GB
|
Physical Memory Limits: Windows Server 2003
The following table specifies the limits on physical memory for Windows Server 2003. Limits over 4 GB for 32-bit
Version
|
Limit on X86
|
Limit on IA64
|
Windows Server 2003, Datacenter Edition
|
64 GB(16 GB with 4GT)
|
512 GB
|
Windows Server 2003, Enterprise Edition
|
64 GB(16 GB with 4GT)
|
512 GB
|
Windows Server 2003, Standard Edition
|
4 GB
| |
Windows Server 2003, Web Edition
|
2 GB
| |
Windows Small Business Server 2003
|
4 GB
| |
Windows Compute Cluster Server 2003
|
32 GB
| |
Windows Storage Server 2003, Enterprise Edition
|
8 GB
| |
Windows Storage Server 2003
|
4 GB
|
Physical Memory Limits: Windows XP
The following table specifies the limits on physical memory for Windows XP.
Version
|
Limit on X86
|
Limit on X64
|
Limit on IA64
|
Windows XP
|
4 GB
|
128 GB
|
128 GB (not supported)
|
Windows XP Starter Edition
|
512 MB
|
N/A
|
N/A
|
Physical Memory Limits: Windows Embedded
The following table specifies the limits on physical memory for Windows Embedded.
Version
|
Limit on X86
|
Limit on X64
|
Windows XP Embedded
|
4 GB
| |
Windows Embedded Standard 2009
|
4 GB
| |
Windows Embedded Standard 7
|
4 GB
|
192 GB
|
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