clm_9657869428294bf5a77258b949558b32_r1

VR2-0304

① SA Source

• Source: 開啟完整 SA 文章
• Section: Replacing Internal Cables with Board-to-Board Connectors
• Line hint: 393

Context Before

Replacing Internal Cables with Board-to-Board Connectors

For the GB200/300, the most valuable cable that is exclusively supplied by Amphenol is the DensiLink OverPass cable set within the compute tray. This cable provides the ethernet connection between the CX-7/8 NIC and the OSFP cages. However, this cable is extremely vulnerable to scratches and damage of the cable termination during assembly, thereby creating many points of failure. There are also several other lower-end PCIe cables in use (MCIO and SlimSAS) that also suffer from the same points of failure. These cables involve many other suppliers as well – complicating procurement and vendor management. Given the delicate nature of the cable, workers must be extremely careful while placing the cables in a very dense and compact chassis, which prolongs assembly time.

Evidence

The signal is then routed through a PCB midplane sitting in the middle of the chassis

Context After

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

② Atomic Claim

接著 signal 會經由位於 chassis 中央的 PCB midplane 路由。

• Epistemic Mode: ASSERTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "attribute": "UNSPECIFIED_ATTRIBUTE",
  "context_nodes": [
    {
      "id": "04_knowledge_base/Midplane",
      "label": "midplane"
    }
  ],
  "entity": {
    "id": "04_knowledge_base/PCB",
    "label": "PCB"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": null,
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "value": {
    "numeric_mentions": [],
    "value_text": "接著 signal 會經由位於 chassis 中央的 PCB midplane 路由。"
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	PCB	PCB
context_0	midplane	Midplane

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。