Memory type | Limit on X86 | Limit in 64-bit Windows |
---|---|---|
User-mode virtual address space for each 32-bit process | 2 GB Up to 3 GB with IMAGE_FILE_LARGE_ADDRESS_AWARE and 4GT | 2 GB with IMAGE_FILE_LARGE_ADDRESS_AWARE cleared (default) 4 GB with IMAGE_FILE_LARGE_ADDRESS_AWARE set |
User-mode virtual address space for each 64-bit process | Not applicable | With IMAGE_FILE_LARGE_ADDRESS_AWARE set (default): x64: 8 TB Intel Itanium-based systems: 7 TB Windows 8.1 and Windows Server 2012 R2: 128 TB 2 GB with IMAGE_FILE_LARGE_ADDRESS_AWARE cleared |
Kernel-mode virtual address space | 2 GB From 1 GB to a maximum of 2 GB with 4GT | 8 TBWindows 8.1 and Windows Server 2012 R2: 128 TB |
Paged pool | 384 GB or system commit limit, whichever is smaller. Windows 8.1 and Windows Server 2012 R2: 15.5 TB or system commit limit, whichever is smaller. Windows Server 2008 R2, Windows 7, Windows Server 2008 and Windows Vista: Limited by available kernel-mode virtual address space. Starting with Windows Vista with Service Pack 1 (SP1), the paged pool can also be limited by the PagedPoolLimit registry key value. Windows Home Server and Windows Server 2003: 530 MB Windows XP: 490 MB | 384 GB or system commit limit, whichever is smaller Windows 8.1 and Windows Server 2012 R2: 15.5 TB or system commit limit, whichever is smaller. Windows Server 2008 R2, Windows 7, Windows Server 2008 and Windows Vista: 128 GB or system commit limit, whichever is smaller Windows Server 2003 and Windows XP: Up to 128 GB depending on configuration and RAM. |
Nonpaged pool | 75% of RAM or 2 GB, whichever is smaller. Windows 8.1 and Windows Server 2012 R2: RAM or 16 TB, whichever is smaller (address space is limited to 2 x RAM). Windows Vista: Limited only by kernel mode virtual address space and physical memory. Starting with Windows Vista with SP1, the nonpaged pool can also be limited by the NonPagedPoolLimit registry key value. Windows Home Server, Windows Server 2003 and Windows XP: 256 MB, or 128 MB with 4GT. | RAM or 128 GB, whichever is smaller (address space is limited to 2 x RAM) Windows 8.1 and Windows Server 2012 R2: RAM or 16 TB, whichever is smaller (address space is limited to 2 x RAM). Windows Server 2008 R2, Windows 7 and Windows Server 2008: 75% of RAM up to a maximum of 128 GB Windows Vista: 40% of RAM up to a maximum of 128 GB. Windows Server 2003 and Windows XP: Up to 128 GB depending on configuration and RAM. |
System cache virtual address space (physical size limited only by physical memory) | Limited by available kernel-mode virtual address space or the SystemCacheLimit registry key value. Windows 8.1 and Windows Server 2012 R2: 16 TB. Windows Vista: Limited only by kernel mode virtual address space. Starting with Windows Vista with SP1, system cache virtual address space can also be limited by the SystemCacheLimit registry key value. Windows Home Server, Windows Server 2003 and Windows XP: 860 MB with LargeSystemCache registry key set and without 4GT; up to 448 MB with 4GT. | Always 1 TB regardless of physical RAM Windows 8.1 and Windows Server 2012 R2: 16 TB. Windows Server 2003 and Windows XP: Up to 1 TB depending on configuration and RAM. |
Version | Limit on X86 | Limit on X64 |
---|---|---|
Windows 10 Enterprise | 4 GB | 6 TB |
Windows 10 Education | 4 GB | 2 TB |
Windows 10 Pro for Workstations | 4 GB | 6 TB |
Windows 10 Pro | 4 GB | 2 TB |
Windows 10 Home | 4 GB | 128 GB |
Version | Limit on X64 |
---|---|
Windows Server 2016 Datacenter | 24 TB |
Windows Server 2016 Standard | 24 TB |
Version | Limit on X86 | Limit on X64 |
---|---|---|
Windows 8 Enterprise | 4 GB | 512 GB |
Windows 8 Professional | 4 GB | 512 GB |
Windows 8 | 4 GB | 128 GB |
Version | Limit on X64 |
---|---|
Windows Server 2012 Datacenter | 4 TB |
Windows Server 2012 Standard | 4 TB |
Windows Server 2012 Essentials | 64 GB |
Windows Server 2012 Foundation | 32 GB |
Windows Storage Server 2012 Workgroup | 32 GB |
Windows Storage Server 2012 Standard | 4 TB |
Hyper-V Server 2012 | 4 TB |
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 |
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 |
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 |
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 |
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 |
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 (16 GB with 4GT) | 1 TB | 2 TB |
Windows Server 2003 with Service Pack 2 (SP2), Standard Edition | 4 GB | 32 GB |
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 |
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 |
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 |
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 |