Microsoft Windows Server 2003 R2 Standard Edition

Component Requirement Computer and processor
PC with a 133-MHz processor required; 550-MHz or faster processor recommended; support for up to four processors on one server
Memory
128 MB of RAM required; 256 MB or more recommended; 4 GB maximum
Hard disk
1.2 GB for network install; 2.9 GB for CD install
Drive
CD-ROM or DVD-ROM drive
Display
VGA or hardware that supports console redirection required; Super VGA supporting 800 x 600 or higher-resolution monitor recommended

Microsoft Windows Server 2003 R2 Enterprise Edition

Component Requirement Computer and processor
133-MHz processor required; 550-MHz recommended; up to eight processors supported on one server
Memory
128 MB of RAM minimum required; 256 MB or more recommended; 64 GB maximum for x86-based computers; 2 TB maximum for x64 and ia64 computers
Hard disk
1.2 GB for network install; 2.9 GB for CD install
Drive
CD-ROM or DVD-ROM drive
Display
VGA or hardware that supports console redirection required; Super VGA supporting 800 x 600 or higher-resolution monitor recommended

Microsoft Windows Server 2003 R2 Datacenter Edition

Component Requirement Computer and processor
400 MHz processor required; 733 MHz processor recommended
Memory
512 MB of RAM required; 1 GB of RAM recommended; 128 GB maximum for x86-based computers; 2 TB maximum for x64 and ia64 computers
Hard disk
1.2 GB for network install; 2.9 GB for CD install
Other
Maximums: 64-way capable multiprocessor machine supported for 64-bit processors and 32-way capable multiprocessor machine supported for 32-bit processors

Microsoft Windows Server 2003 Web Edition

Component Requirement Computer and processor
133-MHz processor (550 MHz recommended)
Memory
128 MB of RAM (256 MB recommended; 2 GB maximum)
Hard disk
1.2 GB for network install; 2.9 GB for CD install