Microsoft deploys world’s first ‘supercomputer-scale’ GB300 NVL72 Azure cluster — 4,608 GB300 GPUs linked together to form a single, unified accelerator capable of 1.44 PFLOPS of inference

Microsoft has just upgraded its Azure cloud platform with Nvidia’s Blackwell Ultra, deploying what it calls the world’s first large-scale GB300 NVL72 supercomputing cluster. This cluster includes several racks housing exactly 4,608 GB300 GPUs connected by NVLink 5 switch fabric, which is then interconnected via Nvidia’s Quantum-X800 InfiniBand networking fabric across the entire cluster. This allows a single NVL72 rack to have a total memory bandwidth of 130 TB/s, with each rack providing 800 Gb/s of…