VR2R-0503_r1

VR2R-0503

① SA Source

• Source: 開啟完整 SA 文章
• Section: Rack Level Infrastructure: Power Delivery
• Line hint: 414

Context Before

For the hyperscale customers, they might choose to deploy a standalone power rack either in LVDC (low voltage direct current) or HVDC (high voltage direct current).

Evidence

Below we provide two possible scenarios of the power rack deployment for VR NVL72.

Context After

First, VR NVL72 rack with an HVDC power rack running at 800VDC (Nvidia Spec) or +/-400VDC (OCP Spec). Since the VR NVL72 rack busbar is still running at 50V and the compute tray can only take in 50V, the 800VDC from the power rack cannot be directly delivered to the busbar. There would still be DC-DC power shelves in the VR NVL72 rack. The DC-DC power shelves will step down the voltage of the current from 800VDC to 50VDC.

② Atomic Claim

SemiAnalysis 接著提出 VR NVL72 power-rack deployment 的兩種可能 scenarios。

• Epistemic Mode: HYPOTHETICAL
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "attribute": "POWER_RACK_DEPLOYMENT_SCENARIOS",
  "context_nodes": [],
  "entity": {
    "id": "04_knowledge_base/VR NVL72",
    "label": "VR NVL72"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": "hypothetical scenarios",
    "numeric_mentions": [
      "2"
    ],
    "temporal_mentions": []
  },
  "value": {
    "numeric_mentions": [
      "2"
    ],
    "value_text": "two possible power-rack deployment scenarios are presented."
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	VR NVL72	04_knowledge_base/VR NVL72

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。