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Why is GPU utilization low during PyTorch training?

Low GPU utilization in PyTorch training usually means the GPU is waiting on the CPU: for the next batch, for a sync like .item() , or for Python to launch the next small kernel. On Nodus, as on any platform that bills by the hour, an NVIDIA H100 SXM listed at $2.60/hr on the Nodus pricing page cost…

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  1. 2026-11-07 02:39 · DEV Community — Machine Learning
    Why is GPU utilization low during PyTorch training?

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