The M1 Max also has twice the memory channels to feed that GPU. Instead of a 256b wide "quad channel" memory controller, it has a 512b wide "octa channel" memor

The M1 Max also has twice the memory channels to feed that GPU. Instead of a 256b wide "quad channel" memory controller, it has a 512b wide "octa channel" memory controller. That's an immense amount of bandwidth with LPDDR5. There's an in between 24-Core GPU for less money, but it's still quite the jump.