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Tom’s Hardware

Technology

Hassam Nasir

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 92.1 exaFLOPS of FP4 inference

Microsoft Nvidia OpenAI

Microsoft deploys GB300 NVL72 supercluster inside Azure.

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 interconnect bandwidth per GPU.

The world's first large-scale @nvidia GB300 NVL72 supercomputing cluster for AI workloads is now live on Microsoft Azure. The deployment connects 4,600+ NVIDIA Blackwell Ultra GPUs using next-gen InfiniBand network—built to train and deploy advanced AI models faster than… pic.twitter.com/CmmDtcrlwnOctober 9, 2025

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