When HPC or Virtual Reality are mentioned, the product best suited will be EnSight Gold or EnSight DR.
EnSight Gold is designed for shared memory parallel post-processing and visualization. First developed for large HP and SGI visualization servers it is now deployed as often for large models on computers running Windows, Linux, or Mac OS X.
EnSight DR (Distributed Rendering) is designed for distributed memory parallel post-processing and visualization. If you want to leverage a graphics cluster then EnSight DR is the right product for you.