We installed and tested PGHPF and we will buy it in the near future.
Some comments related to PGHPF, by Jorge D'Elia
PGHPFPerformanceReportScalar ( in spanish ): Node performance, and comparison with linpack 1000 between pgf77 y GNU g77
PGHPFPerformanceReport ( in spanish ): : Linear system solution by Gauss elimination. Comparing the sane size in scalar mode, and in four nodes, and the maximum allowable size in four nodes.