SA260324R-0237_r1

SA260324R-0237

① SA Source

• Source: 開啟完整 SA 文章
• Section: Oberon and Kyber Updates, Larger World Sizes Introduced, More Networking Updates
• Line hint: 292

Context Before

Moving back to the Kyber Rack, each Rubin Ultra logical GPU offers 14.4Tbit/s uni-di of scale-up bandwidth, using an 80DP connector (72 DPs used x 200Gbit/s bi-di channel = 14.4Tbit/s) per GPU for connectivity to the midplane board.

Evidence

Connecting all 144 GPUs in an all-to-all network will require 72 NVLink 7.0 Switch Chips running at 28.8Tbit/s uni-di of aggregate bandwidth each.

Context After

In the Kyber Switch Blade picture below, we can see that there are 2 separate PCBs carrying 3 Switches each. The switch blade should have 6 152DP connectors, 3 connectors serving each midplane board. The picture is a prototype blade using less dense connectors, which is why there are 12 connectors instead of the 6 that we expect in the production version.

② Atomic Claim

要把 144 顆 GPU 以 all-to-all network 互連，需要 72 顆 NVLink 7.0 switch chip，每顆提供 28.8Tbit/s uni-di aggregate bandwidth。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/GPU",
        "label": "GPU"
      },
      "role": "compute_device"
    },
    {
      "node": {
        "id": "04_knowledge_base/NVLink",
        "label": "NVLink 7.0"
      },
      "role": "switch_technology"
    }
  ],
  "qualifiers": {
    "condition_text": "all-to-all network",
    "numeric_mentions": [
      "144",
      "72",
      "28.8Tbit/s"
    ],
    "temporal_mentions": []
  },
  "relation_type": "ALL_TO_ALL_GPU_SWITCH_REQUIREMENT"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
compute_device	GPU	GPU
switch_technology	NVLink 7.0	NVLink

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。