clm_b5f2ae450700484f908bc39511b53537_r1

VR2-0594

① SA Source

• Source: 開啟完整 SA 文章
• Section: GB200 Hardware Architecture - Component Supply Chain & BOM
• Line hint: 717

Context Before

Source: Nvidia VR NVL72 Component BoM and Power Budget Model ↗

Evidence

Hence, the NVLink 6 Switch board PCB is upgraded to 32 layers with M8+ graded CCL - minimally LDK2 glass fiber cloth or potentially Quartz fiber cloth

Context After

We have more details on the switch tray and various components in the VR NVL72 Component BoM and Power Budget Model ↗.

Zooming out, backplane copper cables are used to connect NVLink Switch trays to the GPU trays for the VR NVL72 system. Although the bandwidth doubles, with bi-directional SerDes, the number of cables required does not change from the GB300 backplane generation to the Vera Rubin NVL72 backplane generation. The number of connectors and the number of DPs per connector also does not change from Grace Blackwell NVL72 to VR NVL72.

② Atomic Claim

因此，NVLink 6 Switch board PCB 升級為 32 layers、M8+ grade CCL，至少採 LDK2 glass fiber cloth，也可能採 Quartz fiber cloth。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "attribute": "LAYER_COUNT",
  "context_nodes": [
    {
      "id": "04_knowledge_base/PCB",
      "label": "PCB"
    },
    {
      "id": "04_knowledge_base/Copper-clad laminate",
      "label": "CCL"
    },
    {
      "id": "04_knowledge_base/高階玻纖布",
      "label": "glass fiber cloth"
    },
    {
      "id": "04_knowledge_base/Quartz cloth",
      "label": "Quartz fiber cloth"
    }
  ],
  "entity": {
    "id": "04_knowledge_base/NVLink",
    "label": "NVLink"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": null,
    "numeric_mentions": [
      "6 S",
      "32 layers"
    ],
    "temporal_mentions": []
  },
  "value": {
    "numeric_mentions": [
      "6 S",
      "32 layers"
    ],
    "value_text": "因此，NVLink 6 Switch board PCB 升級為 32 layers、M8+ grade CCL，至少採 LDK2 glass fiber cloth，也可能採 Quartz fiber cloth。"
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	NVLink	NVLink
context_0	PCB	PCB
context_1	CCL	04_knowledge_base/Copper-clad laminate
context_2	glass fiber cloth	04_knowledge_base/高階玻纖布
context_3	Quartz fiber cloth	04_knowledge_base/Quartz cloth

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。