M1Max doesn’t have more I/O than M1Pro. All I/O blocs are localized on the top part of two dies.
And as Hector said, M1Max is identical to M1Pro but with an bottom extension which provides more Ram interfaces, Caches, GPU, Média and Neural Engines, PLL and probably all the logic for a die to die connection.
But this die-to-die area has been cutted on the Apple picture presented in keynote.
I don’t think M1Pro has a such die-to-die logic, but I don’t see real picture of M1Pro die.
And as Hector said, M1Max is identical to M1Pro but with an bottom extension which provides more Ram interfaces, Caches, GPU, Média and Neural Engines, PLL and probably all the logic for a die to die connection.
But this die-to-die area has been cutted on the Apple picture presented in keynote.
I don’t think M1Pro has a such die-to-die logic, but I don’t see real picture of M1Pro die.