VR2R-0565_r1

VR2R-0565

① SA Source

• Source: 開啟完整 SA 文章
• Section: Scale-Up Network - NVLink 6
• Line hint: 472

Context Before

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

Evidence

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.

Context After

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

雖然 bandwidth 翻倍，但因使用 bidirectional SerDes，從 GB300 backplane 到 Vera Rubin NVL72 backplane，所需 cable 數量並未增加。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "comparison_expression": "bandwidth doubles with bidirectional SerDes while required cable count stays unchanged from GB300 backplane to Vera Rubin NVL72 backplane.",
  "entities": [
    {
      "id": "04_knowledge_base/GB300",
      "label": "GB300"
    },
    {
      "id": "04_knowledge_base/Vera Rubin",
      "label": "Vera Rubin"
    },
    {
      "id": "04_knowledge_base/Backplane",
      "label": "backplane"
    },
    {
      "id": "04_knowledge_base/SerDes",
      "label": "SerDes"
    }
  ],
  "frame_type": "COMPARISON",
  "metric": "BACKPLANE_CABLE_COUNT_WITH_BANDWIDTH",
  "operator": "SAME_COUNT_WITH_HIGHER_BANDWIDTH",
  "qualifiers": {
    "condition_text": "bidirectional SerDes",
    "numeric_mentions": [
      "2x"
    ],
    "temporal_mentions": []
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	GB300	GB300
entity	Vera Rubin	04_knowledge_base/Vera Rubin
entity	backplane	Backplane
entity	SerDes	SerDes

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。