AMD’s Instinct MI455X: Aiming for the Sun

Editor’s Note (7/25/2026): The article has been edited with more information about the L2 behavior along with the bandwidth of the die to die interface.Hello you fine Internet folks, here at AMD’s Advancing AI event we are looking at AMD’s brand new Instinct MI455X, replacing the older Instinct MI355X at the top of their AI stack. It is AMD’s first GPU designed for rack-scale AI deployments and is based on the new CDNA5 architecture with major changes to the compute unit and SoC, including enhan...