NVIDIA expands Spectrum-X Ethernet with Multi-Rail Connectivity for gigascale AI

NVIDIA announced Multi-Rail Connectivity (MRC) for Spectrum-X, its open AI-native Ethernet scale-out fabric, positioning the platform as the standard for hyperscale AI factories. The announcement was co-signed by AMD, Broadcom, Intel, Microsoft, and OpenAI as a new open networking protocol to reduce wasted GPU time during large training runs.