Minor correction: Nvidia GPUs on POWER9 are connected using NVLink, which shares its physical layer with OpenCAPI, and like OpenCAPI is cache-coherent, etc, but

Minor correction: Nvidia GPUs on POWER9 are connected using NVLink, which shares its physical layer with OpenCAPI, and like OpenCAPI is cache-coherent, etc, but uses a different data link and transport layer protocol. (I'm one of the OpenCAPI Linux kernel driver maintainers)