VR2R-0458_r1

VR2R-0458

① SA Source

• Source: 開啟完整 SA 文章
• Section: Procurement and Cooling Vendor Implications
• Line hint: 386

Context Before

Evidence

The primary vendor implication of the updated cooling architecture and doubled power density relates to CDUs and the rack-to-CDU ratio.

Context After

Today, a CDU can support around 10 GB200 racks. With a rack generating about 2x the heat, that ratio would need to decline unless CDU capacity increases, implying either more CDUs or higher-capacity CDUs. We believe most major operators expect to maintain a ratio of around 10 racks per CDU. As rack power density rises, this points to larger CDUs.

② Atomic Claim

Updated cooling architecture 與約翻倍的 power density，對 vendors 的主要影響落在 CDU 與 rack-to-CDU ratio。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/Power Density",
        "label": "power density"
      },
      "role": "driver"
    },
    {
      "node": {
        "id": "04_knowledge_base/Coolant Distribution Unit (CDU)",
        "label": "CDU"
      },
      "role": "cooling_unit"
    }
  ],
  "qualifiers": {
    "condition_text": "vendor implication of updated cooling architecture",
    "numeric_mentions": [
      "2x"
    ],
    "temporal_mentions": []
  },
  "relation_type": "POWER_DENSITY_DRIVES_CDU_RATIO_IMPLICATION"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
driver	power density	04_knowledge_base/Power Density
cooling_unit	CDU	04_knowledge_base/Coolant Distribution Unit (CDU)

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。