a multi-chip package may contain several dies from different fabs optimized for different purposes (logic, memory, device i/o, power, radio, sensors), interconnected more densely and energy-efficiently than on a printed ciruit board.
The next gen Instinct MI300 chips will be AMD's first 3D stacked APU design integrating up to 24 Zen 4 EPYC cores combined with CDNA 3 GPGPU cores and on-die HBM3 memory for a total of more than 146 billion transistors.