Crossing Chiplet Boundaries With PCIe Over UCIe

By Kartik Sahajpal and Prashant Dixit Chiplet-based architectures are reshaping how high-performance systems are built, enabling designers to partition functionality across multiple dies in a single package for better scalability, yield, flexibility, and power efficiency. At the same time, PCI Express continues to remain one of the industry’s most trusted interconnects, delivering the software compatibility, transaction semantics, bandwidth scaling, and ecosystem maturity that modern compute pla