2025-08-12_scaling-the-memory-wall-the-rise-and-roadmap-of-hbm::HBM25-0023

① SA Source

Context Before

Adding more HBM stacks per package adds more bandwidth and capacity

Evidence

Here we can see this in Nvidia’s roadmap. HBM capacity explodes from the A100’s 80 GB of HBM2E to a 1024 GB of HBM4E for Rubin Ultra.

Context After

image

Source: SemiAnalysis

② Atomic Claim

Nvidia roadmap 中,HBM capacity 從 A100 的 80GB HBM2E 增至 Rubin Ultra 的 1,024GB HBM4E。

  • Epistemic Mode: ASSERTED
  • Mapping Status: COMPLETE

③ Semantic Frame

{
  "comparison_expression": "80GB HBM2E -> 1024GB HBM4E",
  "entities": [
    {
      "id": "04_knowledge_base/A100",
      "label": "A100"
    },
    {
      "id": "04_knowledge_base/Rubin Ultra",
      "label": "Rubin Ultra"
    },
    {
      "id": "04_knowledge_base/HBM",
      "label": "HBM"
    }
  ],
  "frame_type": "COMPARISON",
  "metric": "memory_capacity",
  "operator": "INCREASES_TO",
  "qualifiers": {
    "condition_text": null,
    "numeric_mentions": [
      "80 GB",
      "1024 GB"
    ],
    "temporal_mentions": []
  }
}

④ Canonical Entity Mapping

RoleSurface LabelCanonical Target
comparison_entity_0A100A100
comparison_entity_1Rubin Ultra04_knowledge_base/Rubin Ultra
comparison_entity_2HBMHBM

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。