High current AI chipsets are pushing the migration to higher DC voltage buses to efficiently distribute power. 800V or +/-400V high voltage DC buses require a new Power Delivery Board (PDB) DC/DC conversion stage to lower the voltage for server rack distribution. Unprecedented power density requirements must leverage modern topologies in combination with the latest in power semiconductor switch technology, specifically GaN MOSFETs. The seminar will review the ST PDB solution, how it fits into the latest AI server power architectures, and the newly released ST Power GaN portfolio that is at the core of enabling its ultra-high efficiency and power density.