| KEY: | = Not Available | = Available |
| Specification | Web | Standard | Enterprise | Datacenter | Itanium |
| X86 Sockets | 4 | 4 | 8 | 32 | |
| X64 Sockets | 4 | 4 | 8 | 64 | |
| IA64 Sockets | 64 | ||||
| X86 RAM | 4 GB | 4 GB | 64 GB | 64 GB | |
| X64 RAM | 32 GB | 32 GB | 2 TB | 2 TB | |
| IA64 RAM | 2 TB | ||||
| Hot Add Memory | |||||
| Hot Replace Memory | |||||
| Hot Add Processors | |||||
| Hot Replace Processors | |||||
| Failover Cluster Nodes (Nodes) | 16 | 16 | 8 | ||
| Fault Tolerant Memory Sync | |||||
| Cross-File Replication (DFS-R) | |||||
| Network Access Connections (RRAS) | 250 | Unlimited | Unlimited | 2 | |
| Network Access Connections (IAS) | 50 | Unlimited | Unlimited | ||
| Terminal Services Gateway | 250 | Unlimited | Unlimited | ||
| Virtual Image Use Rights | 1 | 4 | Unlimited | Unlimited | |
| Remote Desktop Admin Connections | 2 | 2 | 2 | 2 |
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