| Edition | Architecture | RAM Limit | Ideal For | |---------|-------------|-----------|------------| | Web Edition | x86 (32-bit) | 2 GB | Legacy web apps, IIS 6.0 testing | | Standard Edition | x86, x64 | 4 GB (x86), 32 GB (x64) | Small business file/print servers | | Enterprise Edition | x86, x64 | 64 GB (x86), 2 TB (x64) | Legacy database servers, old ERP systems | | Datacenter Edition | x64 only | 2 TB | Large-scale virtualization (pre-Hyper-V era) |