clm_49665e7e30604208ae010729f5ca00ad_r1

VR2-0598

① SA Source

• Source: 開啟完整 SA 文章
• Section: GB200 Hardware Architecture - Component Supply Chain & BOM
• Line hint: 721

Context Before

As previously explained, high speed signals require better PCB materials, especially for NVLink 6 which has much lower tolerance for insertion loss given the use of bidirectional signaling. The number of lanes between the PaladinHD2 connectors and the NVLink Switch also creates complexity for PCB design. 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.

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

Evidence

Zooming out, backplane copper cables are used to connect NVLink Switch trays to the GPU trays for the VR NVL72 system

Context After

Grace Blackwell NVL72 Scale-up Topology. Source: SemiAnalysis AI Networking Model ↗

② Atomic Claim

從整體架構來看，VR NVL72 使用 backplane copper cables，把 NVLink Switch trays 連接到 GPU trays。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/VR NVL72",
        "label": "VR NVL72"
      },
      "role": "user_or_subject"
    },
    {
      "node": {
        "id": "04_knowledge_base/Backplane",
        "label": "backplane"
      },
      "role": "used_entity"
    },
    {
      "node": {
        "id": "04_knowledge_base/Copper",
        "label": "copper"
      },
      "role": "used_entity"
    },
    {
      "node": {
        "id": "04_knowledge_base/NVLink",
        "label": "NVLink"
      },
      "role": "used_entity"
    },
    {
      "node": {
        "id": "04_knowledge_base/GPU",
        "label": "GPU"
      },
      "role": "used_entity"
    }
  ],
  "qualifiers": {
    "condition_text": null,
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "relation_type": "USES"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
user_or_subject	VR NVL72	04_knowledge_base/VR NVL72
used_entity	backplane	Backplane
used_entity	copper	Copper
used_entity	NVLink	NVLink
used_entity	GPU	GPU

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。