Nvidia ships Quantum-X Photonics, brings co-packaged optics to Ethernet in H2 2026; light replaces copper to wire million-GPU clusters at 3.5x the efficiency
Lightmatter
NVLink licensed to third-party CPUs and accelerators (MediaTek, Marvell, Astera, Lightmatter); a $2B Marvell stake reads as a toll booth, not an investment