vista processor support..
Processor and memory support
What about processor and memory support? Most Windows Vista product editions will be available in both 32-bit and 64-bit (x64) versions. Here's how the various versions support each processor type, and how much RAM they allow.
| Processor and memory support | |||||||||
| Feature | Str | Home N | Home B | Home P | Bus N | Bus | Ent | Ult | |
| Supports 32-bit processors (x86) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | |
| Amount of RAM supported on 32-bit systems | 256 MB | 8 GB | 8 GB | 16 GB | Max physical | Max physical | Max physical | Max physical | |
| Supports 64-bit processors (x64) | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | |
| Amount of RAM supported on x64 systems | n/a | 8 GB | 8 GB | 16 GB | 128 GB+ | 128 GB+ | 128 GB+ | 128 GB+ | |
| Number of physical CPUs supported | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | |
There's been some confusion about the difference between multiple processors and multiple processor cores (for example, both Intel and AMD are currently selling dual-core CPUs, and quad-core chips are on the way). While all of the Vista product editions support only one or two physical processors, none are limited to the number of processor cores they will support.
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