M5 Ultra 512GB vs M5 Ultra 256 GB X2 Cluster

To run large model like Deepseek V4.1 1017 or GLM 5.3 Pro. What is faster ? Single 512GB or Cluster 256GB . I under the cluster will be limited the the thunderbolt speed. Any data on such clusters ?

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2026-10-28 17:49 · r/LocalLLM
M5 Ultra 512GB vs M5 Ultra 256 GB X2 Cluster

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