| Version | Limit in 32-bit Windows | Limit in 64-bit Windows |
|---|---|---|
| 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 |
2 GB |
| 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 |
| Windows XP |
4 GB |
128 GB |
| Windows XP Starter Edition |
512 MB |
Not applicable |
References:
http://msdn.microsoft.com/en-gb/library/aa366778%28VS.85%29.aspx