Physical Memory Limits: Windows VistaThe following table specifies the limits on physical memory for Windows Vista.
| Version | Limit in 32-bit Windows | Limit in 64-bit Windows |
|---|---|---|
| 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 | Not applicable |
