Co-packaged optics-based networking switches with unmatched power efficiency and resiliency. Discover how Corning is innovating optical communications for 400G and beyond. Replacing pluggable transceivers with silicon. OFC 2025 made one thing clear: The transition to Co-Packaged Optics (CPO) switches in data centres is inevitable, driven primarily by the power savings they offer. From Jensen Huang showcasing CPO switches at GTC 2025 to a wide range of vendors demonstrating optical engines integrated inside ASIC. As AI clusters push beyond 100 Tb/s per node, the gap between what silicon can generate and what traditional copper interconnects can deliver is widening fast. Adding GPUs no longer scales linearly, with power and. At the SC25 SuperComputing conference in November, NVIDIA announced that GPU computing facility operators, including Lambda and CoreWeave, as well as the Texas Advanced Data Center (TACC), will adopt its Quantum-X Photonics CPO switches. This article provides a comprehensive overview of CPO optical modules, exploring their technology, benefits, challenges, and the pivotal role they play in future data centers.