They're achieving that bandwidth by putting ridiculous bus widths on the SoCs. The M1 Pro has a 256-bit bus to memory, the M1 Max has a 512-bit bus to memory, a

They're achieving that bandwidth by putting ridiculous bus widths on the SoCs. The M1 Pro has a 256-bit bus to memory, the M1 Max has a 512-bit bus to memory, and the M1 Ultra has a 1024-bit bus to memory.