DeepSeek's DSec sandbox fleet: ~384 EPYC 9655 CPUs powering 380k concurrent sandboxes at ~30% utilization
teortaxesTex · x · 2026-09-23
An analysis sizes DeepSeek's DSec unit at roughly 384 AMD EPYC 9655 chips supporting 380k concurrent sandboxes. That's a peak of 12.6 sandboxes per CPU core — only about 25-30% of max achievable CPU utilization (officially reported transient peak: 41.4%). The author argues even OpenAI couldn't do 4x better, implying hard CPU-side constraints on massive sandbox execution.
Related event: DeepSeek Sandbox Cluster Details Emerge, Estimated $20M Per Unit(3 posts)→
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