OpenAI, Nvidia, AMD and Microsoft unveil MRC protocol to accelerate large-scale AI training
OpenAI has released Multipath Reliable Connection (MRC), a new networking protocol developed with Nvidia, AMD, Intel, Microsoft and Broadcom, through the Open Compute Project. The protocol addresses critical bottlenecks in AI training by distributing data across multiple paths, enabling networks to support up to 131,000 GPUs with microsecond failure recovery. MRC is already deployed in OpenAI's frontier model training and Microsoft's GB200-based AI factories.