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← ML Infrastructure & GPUs / 28
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How many GPUs do you need to serve 1,000 requests/sec, walk me through the capacity math.

The back-of-envelope chain every inference-platform round expects: traffic → tokens/sec → per-GPU throughput from bandwidth math → fleet size → dollars. With the headroom factors candidates forget.

Updated Sep 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.

The back-of-envelope chain every inference-platform round expects: traffic → tokens/sec → per-GPU throughput from bandwidth math → fleet size → dollars. With the headroom factors candidates forget.

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