DescriptionIBM continues its innovation around new memory technologies with the recently developed Hybrid Memory Subsystem (HMS) adapter, enabling 3TB per card of persistent memory in today's POWER9 system. Applications which require large memory footprints can utilize up to 24TB of load/store persistent memory in a 4 socket system, at a lower cost/GB than DRAM. This is IBM's first storage class memory card leveraging the OpenCAPI 25GB/s high speed serial interface in existing IBM systems. This presentation will cover the HMS architecture, software stack enablement around the standardized SNIA programming model and illustrate the benefits of persistent memory on a high speed serial interface. Additionally, we will be demonstrating HMS performance at the OpenCAPI booth, showing real-world benefits not previously achievable.