VR2R-0357_r1

VR2R-0357

① SA Source

• Source: 開啟完整 SA 文章
• Section: PCB Materials Upgrade and Area Growth
• Line hint: 306

Context Before

Within VR NVL72, Quartz is initially adopted for the Orchid board and

Evidence

the midplane to allow the longest distance PCIe Gen 6 signal traveling through these two boards with as little insertion loss as possible.

Context After

However, given the cost of the Quartz cloth and the difficulty in Q cloth processing, Nvidia is currently exploring the option of downgrading back to glass fiber cloth. The final decision is pending on the signal performance with the downgraded glass fiber cloth.

② Atomic Claim

……以及 midplane，讓最長距離的 PCIe Gen 6 signal 穿過這兩塊 boards 時，insertion loss 盡可能低。

• Epistemic Mode: HYPOTHETICAL
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/Midplane",
        "label": "midplane"
      },
      "role": "board"
    },
    {
      "node": {
        "id": "04_knowledge_base/PCIe",
        "label": "PCIe Gen 6"
      },
      "role": "interface"
    }
  ],
  "qualifiers": {
    "condition_text": "continuation of VR2R-0356; 'these two boards' refers to Orchid board and midplane",
    "numeric_mentions": [
      "6"
    ],
    "temporal_mentions": []
  },
  "relation_type": "QUARTZ_SUPPORTS_LONG_REACH_PCIE6_ON_ORCHID_AND_MIDPLANE"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
board	midplane	Midplane
interface	PCIe Gen 6	PCIe

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。