VR2R-0362_r1

VR2R-0362

① SA Source

• Source: 開啟完整 SA 文章
• Section: PCB Materials Upgrade and Area Growth
• Line hint: 308

Context Before

Beside material upgrade, the other driver of PCB content value is the increase of high end PCB area coverage. In Grace Blackwell, the only boards with high end material are the Bianca board with M7 grade CCL and the NVSwitch board with M8 grade CCL, leaving front half of the compute tray uncovered by high end PCB board.

Evidence

For VR NVL72, the Orchid board and the midplane board increases the high end PCB board area in the compute tray covering the front half of the chassis.

Context After

With the Strata board bigger than the Bianca board and the extra peripheral boards in the compute tray, we estimate that the area of high end PCB board increases by ~2.3 times from GB300 to VR NVL72. The Orchid board is the main contributor to the delta of total high-end PCB area between GB300 and VR NVL72 rack.

② Atomic Claim

對 VR NVL72 而言，Orchid board 與 midplane board 增加了 compute tray 的 high-end PCB board area，覆蓋 chassis 前半部。

• 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": "system"
    },
    {
      "node": {
        "id": "04_knowledge_base/NVIDIA Orchid Board",
        "label": "Orchid board"
      },
      "role": "board"
    },
    {
      "node": {
        "id": "04_knowledge_base/Midplane",
        "label": "midplane"
      },
      "role": "board"
    },
    {
      "node": {
        "id": "04_knowledge_base/Compute Tray",
        "label": "compute tray"
      },
      "role": "system_component"
    },
    {
      "node": {
        "id": "04_knowledge_base/PCB",
        "label": "PCB"
      },
      "role": "board_type"
    }
  ],
  "qualifiers": {
    "condition_text": "covers the front half of the chassis",
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "relation_type": "VR_ORCHID_MIDPLANE_EXPAND_HIGH_END_PCB_AREA"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
system	VR NVL72	04_knowledge_base/VR NVL72
board	Orchid board	04_knowledge_base/NVIDIA Orchid Board
board	midplane	Midplane
system_component	compute tray	04_knowledge_base/Compute Tray
board_type	PCB	PCB

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。