Hardware support limits

Physical memory

Maximum limits on physical memory (RAM) that Windows 7 can address vary depending on both the Windows version and between 32-bit and 64-bit versions. The following table specifies the maximum physical memory limits supported:

Physical memory limits for Windows 7 Version Limit in 32-bit Windows Limit in 64-bit Windows Windows 7 Ultimate 4 GB 192 GB Windows 7 Enterprise Windows 7 Professional Windows 7 Home Premium 16 GB Windows 7 Home Basic 8 GB Windows 7 Starter 2 GB N/A Processor

The maximum total number of logical processors in a PC that Windows 7 supports is: 32 for 32-bit, 256 for 64-bit.

The maximum number of physical processors in a PC that Windows 7 supports is: 2 for Professional, Enterprise, and Ultimate, and 1 for Starter, Home Basic, and Home Premium.