SA260324R-0267_r1

SA260324R-0267

① SA Source

• Source: 開啟完整 SA 文章
• Section: Rubin Ultra NVL576
• Line hint: 334

Context Before

Optics will be required for the inter-rack connections, though strictly speaking it isn’t confirmed whether this will be with pluggable optics or with CPO, though CPO seems much more likely. The current Blackwell NVL576 prototype “Polyphe” uses pluggable optics.

Evidence

We have shown a concept of NVL576 for GB200 previously with pluggable optics to interconnect the second layer of NVLink switches.

Context After

The use of pluggables contributed to an enormous increase in BOM cost that made the system untenable from a TCO perspective for a switched all-to-all. However, it is plausible that Rubin Ultra NVL576 will be rolled out in test volumes before Feynman NVL1152, where we will see actual volume ramp of scale-up CPO.

② Atomic Claim

SemiAnalysis 先前曾展示 GB200 的 NVL576 concept，使用 pluggable optics 連接第二層 NVLink switch。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/GB200",
        "label": "GB200"
      },
      "role": "platform"
    },
    {
      "node": {
        "id": "04_knowledge_base/NVL576",
        "label": "NVL576"
      },
      "role": "system"
    },
    {
      "node": {
        "id": "04_knowledge_base/Pluggable optics",
        "label": "pluggable optics"
      },
      "role": "optics"
    },
    {
      "node": {
        "id": "04_knowledge_base/NVSwitch",
        "label": "NVLink switch"
      },
      "role": "switch"
    }
  ],
  "qualifiers": {
    "condition_text": null,
    "numeric_mentions": [
      "576",
      "second layer"
    ],
    "temporal_mentions": [
      "先前"
    ]
  },
  "relation_type": "SECOND_TIER_SWITCH_INTERCONNECT"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
platform	GB200	GB200
system	NVL576	NVL576
optics	pluggable optics	04_knowledge_base/Pluggable optics
switch	NVLink switch	NVSwitch

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。