The Definitive Guide toAI Data Centers
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Guide › Glossary › LLM

LLM · Large Language Model

An autoregressive transformer trained on text at scale; its training and inference shapes drive the facility designs in this guide.

Current numbers

~1–3% tuned servingBlackwell (B200) confidential-computing overhead for a tuned LLM serving stack; 30–40% for a stock stack, ~10–13% for eight-GPU trainingas of 2026-09 · register ↗
30%peak grid-demand cut while training Megatron-LLM, measured on a GB200 rack fitted with the GB300 power shelfas of 2025-07 · register ↗
~43.4%Failure rate, top 5% most resource-intensive LLM tasks (Alibaba Unicron, Dec 2023); ~73% of failures fixable by restarting the jobas of 2023-12 · register ↗

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