HBM Base Die Signal Mapping for Scalable D2D Bandwidth

The system is divided into separate chiplets (compute die, HBM dies, I/O die) connected through die-to-die interconnects. Each chiplet can be independently manufactured and tested, then assembled into a superchip. This segmentation allows the system to achieve high memory bandwidth by adding more HBM chiplets without proportionally increasing overall system complexity, as each module remains relatively simple and standardized.

The die-to-die interconnect interface is designed as a universal standard that can connect different types of chiplets (compute, memory, I/O) with different functions. This universal interface reduces the need for custom connection logic for each chiplet type, thereby reducing overall device complexity while enabling flexible expansion of memory bandwidth through additional HBM chiplets.

By segmenting the memory system into multiple independent HBM chiplets connected via die-to-die interconnects, the system can activate only the number of chiplets needed for the current workload. This allows memory bandwidth to be scaled up or down dynamically, optimizing power consumption to match actual performance requirements rather than always operating at maximum capacity.

The system employs dynamic configuration capabilities where the number of active HBM chiplets and their connection topology can be adjusted based on workload demands. This dynamic adaptability allows the system to optimize the balance between memory bandwidth and power consumption by activating only the necessary number of high-bandwidth pathways when needed.

Instead of creating a single large compute die with numerous HBM interfaces, the system segments the memory interfaces across multiple smaller HBM chiplets. Each chiplet has a manageable edge size that is feasible to manufacture with current semiconductor fabrication capabilities. The high total bandwidth is achieved by parallelizing across multiple chiplets rather than concentrating all interfaces on one large die.

The system transitions from a two-dimensional layout constraint (edges of a single compute die) to a three-dimensional stacked architecture with multiple chiplets connected vertically through die-to-die interconnects. This dimensional change allows the system to achieve high memory bandwidth by adding layers (stacking HBM chiplets) rather than expanding the footprint of a single chip, thereby avoiding the manufacturing challenges of large-edge dies while still achieving the required bandwidth.