Windows 2000 Professional

• 133 MHz or higher Pentium-compatible CPU.
• 64 megabytes (MB) of RAM recommended minimum; more memory generally improves responsiveness [4 gigabytes (GB) RAM maximum.]
• 2 GB hard disk with a minimum of 650 MB of free space. (Additional free hard disk space is required if you are installing over a network.)
• Windows 2000 Professional supports single and dual CPU systems.

Windows 2000 Server

• 133 MHz or higher Pentium-compatible CPU.
• 256 MB of RAM recommended minimum. (128 MB minimum supported; 4 GB maximum.)
• 2 GB hard disk with a minimum of 1 GB of free space. (Additional free hard disk space is required if you are installing over a network.)
• Windows 2000 Server supports up to four CPUs on one machine.

Windows 2000 Advanced Server

• 133 MHz or higher Pentium-compatible CPU.
• 256 MB of RAM recommended minimum (128 MB minimum supported; 8 GB maximum.)
• 2 GB hard disk with a minimum of 1 GB of free space. (Additional free hard disk space is required if you are installing over a network.)
• Windows 2000 Advanced Server supports up to eight CPUs on one machine.