Apple Silicon M1 chip in MacBook Air outperforms high-end 16-inch MacBook Pro

Can somebody explain how is M1 going to work on larger GPU tasks (rendering, encoding etc) with it's memory bandwidth M1 total memory bandwidth is 68.2 GB/s (128 bit LPDDR4x-4267)

AMD Radeon Pro 5600m memory bandwidth is 394.2 GB/s (2048 bit HBM2)

https://www.techpowerup.com/gpu-specs/radeon-pro-5600m.c3612

68.2GB/s is a ton of bandwidth.

Actually, very, very few tasks on a desktop can stress a CPU enough to saturate the bandwidth on a single task.

Proper HPC programs written to have absolutely zero cache misses can. A javascript eating 1GB of RAM to show some text, and pictures, cannot.