clm_2df896a4dff34893bd38dbea07efe247_r1

VR2-0175

① SA Source

• Source: 開啟完整 SA 文章
• Section: CPX Form Factor
• Line hint: 235

Context Before

Rubin CPX was originally architected as a GDDR7-based accelerator optimized for prefill, based on three key considerations:

Evidence

Prefill is primarily FLOPs-limited, not bandwidth-limited, making HBM less indispensable

Context After

HBM’s increased bandwidth is structurally underutilized in prefill.

② Atomic Claim

Prefill 主要受 FLOPs 限制，而非 bandwidth，因此 HBM 並非不可或缺。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "attribute": "BANDWIDTH",
  "context_nodes": [
    {
      "id": "04_knowledge_base/HBM",
      "label": "HBM"
    }
  ],
  "entity": {
    "id": "04_knowledge_base/Prefill",
    "label": "Prefill"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": null,
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "value": {
    "numeric_mentions": [],
    "value_text": "Prefill 主要受 FLOPs 限制，而非 bandwidth，因此 HBM 並非不可或缺。"
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	Prefill	Prefill
context_0	HBM	HBM

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。