AMD’s Instinct MI455X: Aiming for the Sun
Summary
AMD unveiled the Instinct MI455X, the flagship GPU built on the CDNA5 architecture for rack-scale AI deployments and packaged in the Helios rack system. The article outlines major architectural changes, including new WGP-based compute units, enhanced memory subsystem, and a scalable interconnect that enables up to 72 GPUs per rack. It highlights the potential impact on data-center AI workloads through high memory bandwidth, multicast loads, and scale-out networking.