Core concept
GB200 NVL72: rack of 36 Grace CPUs + 72 Blackwell GPUs. NVLink Switch fabric. Single logical GPU-like.
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How it works
1200W per Blackwell. Rack draws 100+ kW. Liquid cooling mandatory. Deployment complex.
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Trade-offs + gotchas
Frontier training. Multi-trillion param inference. Hyperscaler use.