Earlier quoted context omitted.
The memory bandwidth on Apple silicon is only sometimes comparable to, and in many cases worse than, that of a GPU. For example, an nVidia RTX 4060 Ti 16GB GPU (not a high-end card by any means) has memory bandwidth of 288GiB/sec, which is more than double that of the M4 CPU. On the higher end, building a machine with 6 to 8 24GB GPUs such as RTX 3090s would be comparable in cost (as well as available memory) to a hi…
Note that they said the _Mac Studio_ which in the M2 model has between 400GB/s and 800GB/s memory bandwidth. https://www.apple.com/mac-studio/specs/ Edit: since my reply you have edited your comment to mention the Studio, but the fact remains that the M2 Max has at least ~40% greater bandwidth than the number you quoted as an example.
Apple's chips have the advantage of being able to be specced out with tons of RAM, but performance isn't going to be in the same ballpark of even fairly old Nvidia chips.