This post aims to show how the performance of systems implementing the 600/6000-series mainframe architecture evolved across hardware generations — and where the DPS8M Simulator fits in. It is not intended as an exhaustive reference for all models, instead focusing on the four generations of machines that ran the Multics operating system. Multics-capable Mainframe Performance Although exact details are often unclear (and we don’t have original systems available to run new benchmarks), we can present the graphic above, representing the various systems that were used for running Multics, with a very high level of confidence.