Lambda Unboxes NVIDIA's First Co-Packaged Optics Switch for Large GPU Clusters

Jul 11, 2026

Lambda has unboxed one of NVIDIA's first co-packaged optics switches, the Quantum-X InfiniBand Photonics Q3450-LD. The company notes that at 800G and GB300 NVL72 scale, the back-end fabric accounts for 86% of networking power in a three-layer cluster, and highlights the potential of co-packaged optics (CPO) to address power and reliability challenges in large-scale AI clusters.

Why it matters: Co-packaged optics could help reduce networking power and improve reliability in large GPU clusters as workloads generate more east-west traffic.

Full story at: Lambda Blog ↗