AMD attacks the rack with Helios systems that rival Nvidia's

AMD unveiled the Instinct MI455X AI accelerator at the Advancing AI 2026 event, featuring CDNA 5 and the Helios rack-scale architecture. Designed for data centers, the platform emphasizes large HBM memory capacity and strong competitive performance. On paper, the House of Zen's first rack-scale AI compute platform is bigger and faster than Nvidia's Vera Rubin by nearly every metric, positioning Helios as a direct rival to Nvidia's offerings in the high-performance AI compute market.