Are there maximum RAM limitations for the operating system?
Operating system maximum RAM limits
Here is a breakdown of Windows operating systems.
Windows 8 limits on physical memory:
- 32-bit Edition
- Windows 8 = 4GB
- Windows 8 Professional = 4GB
- Windows 8 Enterprise = 4GB
- 64-bit Edition
- Windows 8 = 128GB
- Windows 8 Professional = 512GB
- Windows 8 Enterprise = 512GB
Windows 7 limits on physical memory:
- 32-bit Edition
- Windows 7 Ultimate = 4GB
- Windows 7 Enterprise = 4GB
- Windows 7 Professional = 4GB
- Windows 7 Home Premium = 4GB
- Windows 7 Home Basic = 4GB
- Windows 7 Starter = 2GB
- 64-bit Edition
- Windows 7 Ultimate = 192GB
- Windows 7 Enterprise = 192GB
- Windows 7 Professional = 192GB
- Windows 7 Home Premium = 16GB
- Windows 7 Home Basic = 8GB
- Windows 7 Starter = N/A
Windows Vista limits on physical memory:
- 32-bit Edition
- Windows Vista Ultimate = 4GB
- Windows Vista Enterprise = 4GB
- Windows Vista Business = 4GB
- Windows Vista Home Premium = 4GB
- Windows Vista Home Basic = 4GB
- Windows Vista Starter = 1GB
- 64-bit Edition
- Windows Vista Ultimate = 128GB
- Windows Vista Enterprise = 128GB
- Windows Vista Business = 128GB
- Windows Vista Home Premium = 16GB
- Windows Vista Home Basic = 8GB
- Windows Vista Starter = N/A
Windows Home Server = 4GB
Windows XP limits on physical memory:
- 32-bit Edition
- Windows XP = 4GB
- Windows XP Starter = 512MB
- 64-bit Edition
- Windows XP = 128GB
- Windows XP Starter = N/A
Source = Memory Limits for Windows Releases