clm_41c29491e80f4f86a1cc6b77339ed94d_r1

GB2-0043

① SA Source

• Source: 開啟完整 SA 文章
• Section: GB200 NVL576
• Line hint: 349

Context Before

Source: SemiAnalysis

Evidence

Unfortunately, between the L1 NVSwitch and the L2 NVSwitch, the distance is greater than what copper can achieve; thus, optical connections must be used.

Context After

Applying a blanket 75% gross margin means customers would need to pay an additional 38.8k per GPU for NVL576 copper + optical connections. While Nvidia can cut back on margins, even at 0% for the scale out NVLink solution, it’s basically untenable. This is the exact same reason to why DGX H100 NVL256 never shipped due to the massive cost of transceivers ↗. Optics is far too expensive for the accelerator interconnect as the accelerator interconnect needs to be extremely high bandwidth.

② Atomic Claim

NVL576 的 L1 與 L2 NVSwitch 距離超出 copper 可達範圍，因此必須採 optical connections。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "additional_nodes": [
    {
      "id": "04_knowledge_base/Copper",
      "label": "copper"
    }
  ],
  "frame_type": "RELATION",
  "object": {
    "id": "04_knowledge_base/NVSwitch",
    "label": "NVSwitch"
  },
  "predicate": "REQUIRES",
  "qualifiers": {
    "condition_text": "L1-to-L2 distance requires optical rather than copper",
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "subject": {
    "id": "04_knowledge_base/NVL576",
    "label": "NVL576"
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
subject	NVL576	NVL576
object	NVSwitch	NVSwitch
additional_0	copper	Copper

⑤ Human Review

請在 Properties 逐項確認：

• 原文 → Atomic Claim 是否忠實
• Atomic Claim → Semantic Frame 是否忠實
• Canonical Entity mapping 是否正確
• Epistemic mode 是否保留原文語氣
• 最後選擇 review_action

Review state

Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。