VR2R-0292_r1

VR2R-0292

① SA Source

• Source: 開啟完整 SA 文章
• Section: Relocating ConnectX-9
• Line hint: 262

Context Before

To accommodate this cableless design, the CX-9 NICs, that would have been on the Strata modules, are relocated to the Orchid module (from the back half to the front half of the chassis).

Evidence

For the GB200/GB300, the PCIe signal distance between the GPU/CPU and the CX-7/8 is shorter than the Ethernet/InfiniBand signal distance between the CX-7/8 and the OSFP cages.

Context After

Previously—having to transmit a 200G Ethernet/InfiniBand signal from the NIC in the back half of the compute tray to the OSFP cage in the front of the compute tray necessitated the use of flyover cables as the signal loss over PCB at 200Gbit/s (uni-directional) per lane is too high.

② Atomic Claim

在 GB200／GB300 中，GPU／CPU 到 CX-7/8 的 PCIe signal 距離，比 CX-7/8 到 OSFP cages 的 Ethernet／InfiniBand signal 距離更短。

• Epistemic Mode: ASSERTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/GB200",
        "label": "GB200"
      },
      "role": "system"
    },
    {
      "node": {
        "id": "04_knowledge_base/GB300",
        "label": "GB300"
      },
      "role": "system"
    },
    {
      "node": {
        "id": "04_knowledge_base/GPU",
        "label": "GPU"
      },
      "role": "processor"
    },
    {
      "node": {
        "id": "04_knowledge_base/CPU",
        "label": "CPU"
      },
      "role": "processor"
    },
    {
      "node": {
        "id": "04_knowledge_base/PCIe",
        "label": "PCIe"
      },
      "role": "host_interface"
    },
    {
      "node": {
        "id": "04_knowledge_base/Ethernet",
        "label": "Ethernet"
      },
      "role": "network_protocol"
    },
    {
      "node": {
        "id": "04_knowledge_base/InfiniBand",
        "label": "InfiniBand"
      },
      "role": "network_protocol"
    }
  ],
  "qualifiers": {
    "condition_text": "CX-7/8 and OSFP cages are plain text in source claim; PCIe distance is shorter",
    "numeric_mentions": [
      "7",
      "8"
    ],
    "temporal_mentions": []
  },
  "relation_type": "COMPARE_PCIE_AND_NETWORK_SIGNAL_DISTANCES"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
system	GB200	GB200
system	GB300	GB300
processor	GPU	GPU
processor	CPU	CPU
host_interface	PCIe	PCIe
network_protocol	Ethernet	Ethernet
network_protocol	InfiniBand	InfiniBand

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。