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      NVIDIA DGX H200 vs. DGX B200: Choosing the Right AI Server

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      uvation
      Team Uvation
      16 minute read
      July 29, 2025
      Industry : energy-utilities
      NVIDIA DGX H200 vs. DGX B200: Choosing the Right AI Server
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      Reen Singh
      Reen Singh

      Writing About AI

      Uvation

      Reen Singh is an engineer and a technologist with a diverse background spanning software, hardware, aerospace, defense, and cybersecurity. As CTO at Uvation, he leverages his extensive experience to lead the company’s technological innovation and development.

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      FAQs

      • NVIDIA DGX systems are pre-built, supercomputing platforms specifically engineered to handle the intensive demands of enterprise-level Artificial Intelligence (AI). They are factory-tuned engines designed to accelerate AI development and deployment. The fundamental difference between the DGX H200 and DGX B200 lies in their underlying GPU architectures. The DGX H200 is powered by eight H200 Tensor Core GPUs based on the established Hopper architecture, which is a second-generation design optimised for AI and High-Performance Computing (HPC). In contrast, the DGX B200 features eight B200 GPUs, which are part of the newer, revolutionary Blackwell architecture, introduced in 2024, offering groundbreaking compute performance and higher memory capacity.

      • The GPU architectures significantly differentiate the memory and interconnect capabilities of the two systems. The DGX H200, leveraging the Hopper architecture, includes eight H200 GPUs with a total of approximately 1,128 GB of GPU memory using HBM3e (High Bandwidth Memory), providing data access speeds of up to 4.8 terabytes per second (TB/s) per GPU. This makes it highly effective for large-scale AI inference and HPC. The DGX B200, built on the next-gen Blackwell platform, also features eight B200 GPUs but offers a higher total GPU memory of around 1,440 GB due to its advanced HBM3e memory. Crucially, the B200 boasts an extremely high system interconnect bandwidth of up to 64 TB/s, enabling significantly faster communication between GPUs and enhancing overall performance, especially for large generative AI models.

      • The DGX H200 delivers impressive performance for enterprise AI inference, offering up to 32 petaFLOPS of FP8 (floating point 8-bit) AI performance across its eight GPUs. This is approximately 2 times faster than its predecessor, the DGX H100, making it excellent for large language models (LLMs) and HPC at enterprise scale. The DGX B200, however, represents a significant leap in raw AI performance, particularly for training and generative AI. It provides up to 72 petaFLOPS for AI training and up to 144 petaFLOPS for AI inference using FP8 precision. NVIDIA claims the DGX B200 offers up to 3 times faster training and 15 times faster inference compared to the DGX H100, making it ideal for massive generative AI models and real-time inference due to its superior compute power, increased GPU memory, and faster internal communication.

      • Both DGX H200 and DGX B200 are designed with top-tier components for enterprise AI, but the DGX B200 offers higher capacity and bandwidth. The DGX H200 includes two Intel Xeon Platinum 8480C CPUs (112 cores total) with speeds up to 3.8 GHz, 2 TB of DDR system memory, and a 4th-generation NVSwitch for GPU communication. It has 8 ConnectX-7 OSFP ports (400 Gb/s) and BlueField-3 DPUs. Storage comprises two 1.9 TB NVMe drives for the OS and eight 3.84 TB NVMe U.2 drives for data caching. The DGX B200 also has dual Intel Xeon Platinum CPUs (8570, 112 cores), but these reach up to 4.0 GHz. Crucially, it doubles the system memory to up to 4 TB DDR and features a 5th-generation NVSwitch, delivering 14.4 TB/s of aggregate bandwidth between GPUs. While networking and storage layouts are similar, the DGX B200 has a higher maximum power consumption of around 14.3 kW compared to the H200’s 10.2 kW.

      • The DGX H200 is best suited for scalable inference, High-Performance Computing (HPC), and general enterprise AI scaling. Its FP8 precision support makes it highly efficient for deploying large language models (LLMs) and complex data analysis tasks that require high bandwidth and memory performance. It integrates well into enterprise settings building “AI factories” for simultaneous model deployment. The DGX B200, conversely, is built for large-scale model training and generative AI applications. Its superior GPU memory, faster interconnects, and higher compute throughput make it optimal for teaching AI models with vast datasets, creating generative content (images, code, natural language), and real-time inference where speed is critical. It excels in advanced LLM training, recommender systems, and comprehensive AI pipelines that encompass both training and inference.

      • Both the DGX H200 and DGX B200 are supported by an integrated and comprehensive NVIDIA software stack. They are bundled with NVIDIA AI Enterprise, a full suite of software tools and libraries for end-to-end AI development, including frameworks for training, inference, security, and performance optimisation. This ensures enterprise-grade reliability for AI application deployment. Both systems also include NVIDIA Base Command for orchestration and job scheduling, facilitating the management of multiple AI workloads, tracking training jobs, usage metrics, and system health. They run on DGX OS, NVIDIA’s optimised operating system for AI, which supports Ubuntu Linux and Red Hat Enterprise Linux (RHEL). DGX OS includes optimised containers, libraries like cuDNN and TensorRT, and direct access to NVIDIA NGC (NVIDIA GPU Cloud) for pre-trained models, streamlining setup and deployment for developers.

      • Data centre planning requires consideration of the physical and power demands of these servers. The DGX H200 is more compact, occupying 8U of rack space (approximately 356 mm high) and weighing around 130 kg. Its power consumption during full operation is approximately 10.2 kilowatts (kW), which is considered efficient given its performance. The DGX B200 has a slightly larger physical footprint, requiring 10U of rack space (about 444 mm high), providing more internal space for power delivery and thermal management. It is also slightly heavier at around 142 kg. The DGX B200’s peak power consumption is significantly higher at approximately 14.3 kW, reflecting its increased GPU memory, CPU power, and faster interconnects. This higher power draw necessitates more careful planning for electrical and cooling infrastructure in data centre environments.

      • The NVIDIA DGX H200 and DGX B200 represent current high-performance AI infrastructure standards, with the DGX B200 already leveraging the latest Blackwell architecture. NVIDIA’s roadmap indicates a continuous progression towards more advanced systems, such as the GB200 Grace Blackwell Superchip, which combines Blackwell GPUs with Grace CPUs for even higher performance and memory throughput. The upcoming DGX GH200 is also anticipated, offering over 16 TB of unified memory using NVLink for the largest, most data-intensive models. Both DGX H200 and B200 servers are designed as modular units that can scale within larger DGX SuperPOD or NVIDIA BasePOD environments, allowing businesses to expand their AI capabilities while maintaining compatibility with new GPU generations. This modularity ensures long-term value through an upgradeable architecture, positioning them as foundational blocks for building future-proof AI factories and data centres.

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