Matching Workloads to Blackwell: Power-Resolved Benchmarking of NVIDIA B200 and B300 across HPC and AI Workloads
Auteurs : Mohsen Zand, Trung Dac Nguyen, H. Birali Runesha
Résumé scientifique
We evaluate NVIDIA B200 and B300 (Blackwell Ultra) GPUs on two independent eight-GPU clusters, spanning computer-vision inference and training, LLM inference with Llama-3-8B and 70B~\cite{llama3}, and six production HPC codes. The B300 is not a uniform successor to the B200: it trails by up to 5.6$\times$ on convolutional inference, 8$\times$ on 3D vision transformer training, 24--27\% on 70B LLM throughput, and 16$\times$ on double-precision Quantum ESPRESSO. We resolve the convolutional deficit using per-GPU board power rather than throughput alone: on the affected workloads the B300 draws only 36--53\% of its 1100\,W envelope, whereas on ViT-Large, which it wins, both parts saturate at 95--97\% of TDP. Because our harness keeps inputs resident in device memory, a host-side data pipeline is excluded by construction, localizing the cause to per-kernel cost. Two B300 nodes of identical silicon differ by 2.1$\times$ in time-to-first-token solely from a development vLLM build. We give per-workload procurement guidance.
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Mis à jour le 2 novembre 2026.