Windows Compute Cluster Server 2003 provides a cost effective and powerful HPC (High Performance Computing) solution that runs on commodity x64-based computers and can be easily and quickly expanded and deployed using familiar tools and technologies. It is better management and deployment, integrated with Active Directory. You can use Compute Cluster Manager. The Microsoft Message Passing Interface (MS-MPI) is a version of the Argonne National Labs Open Source MPI2 implementation that is widely used by existing HPC clusters.