Unfortunately, the memory bandwidth that matters here is not bandwidth to GPU memory, but bandwidth to main system memory (unless anyone knows how to splice a p

Unfortunately, the memory bandwidth that matters here is not bandwidth to GPU memory, but bandwidth to main system memory (unless anyone knows how to splice a pointer to GPU memory onto a unix pipe). That's specifically why the M1 came to mind, as a powerful UMA machine that can run Linux. Perhaps a modern gaming console could hit the same performance, but I don't know if they can run Linux.