Windows 2000 Professional:
*133 MHz or higher Pentium-compatible CPU.
*64 megabytes (MB) of RAM recommended minimum; more memory generally improves responsiveness.
*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 Professional supports single and dual CPU systems.
Windows 2000 Server:
*133 MHz or higher Pentium-compatible CPU.
*256 megabytes (MB) of RAM recommended minimum [128 MB minimum supported; 4 gigabytes (GB) maximum].
*2 GB hard disk with a minimum of 1.0 GB 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 1.0 GB 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.