Keep in mind that the GPU architecture is TBDR, which is designed for lower memory bandwidth (and thus lower power consumption) than typical immediate mode GPUs

Keep in mind that the GPU architecture is TBDR, which is designed for lower memory bandwidth (and thus lower power consumption) than typical immediate mode GPUs. Desktop GPUs also use tiles these days, but for rendering use cases at least the TFLOPS:bandwidth ratio is probably not directly comparable between architectures that dissimilar. The CPUs can still eat half of the M1 Max's memory bandwidth alone, without the GPU to help. How often this happens with real world workloads, I don't know :-)