SA260324R-0143_r1

SA260324R-0143

① SA Source

• Source: 開啟完整 SA 文章
• Section: LPX Compute Tray
• Line hint: 181

Context Before

Each LPX compute tray or node has 16 LPUs with 2 Altera FPGAs, 1 Intel Granite Rapids host CPU and 1 BlueField-4 front-end module. As with other Nvidia systems, hyperscalers customers can and will use their own Front-end NIC of choice rather than paying for Nvidia’s BlueField.

Evidence

The LPU modules are mounted in a belly-to-belly on the PCB, meaning 8 LP30 modules on the top side of the PCB and the other 8 LP30 modules on the bottom.

Context After

All of the connectivity that comes out of the LPU are via PCB traces and given the dense all-to-all mesh for intra-node connections this requires a very high spec PCB to support the routing. The belly-to-belly mounting is used to reduce PCB trace lengths across the ‘X’ and ‘Y’ dimensions.

② Atomic Claim

LPU module 在 PCB 上採 belly-to-belly 安裝：8 個 LP30 module 位於 PCB 上側，另外 8 個位於下側。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/Groq LPU",
        "label": "LPU"
      },
      "role": "module_type"
    },
    {
      "node": {
        "id": "04_knowledge_base/Groq LP30",
        "label": "LP30"
      },
      "role": "specific_module"
    },
    {
      "node": {
        "id": "04_knowledge_base/PCB",
        "label": "PCB"
      },
      "role": "substrate"
    }
  ],
  "qualifiers": {
    "condition_text": "8 個 LP30 在 PCB 上側，另外 8 個在下側",
    "numeric_mentions": [
      "8",
      "8"
    ],
    "temporal_mentions": []
  },
  "relation_type": "BELLY_TO_BELLY_MOUNTING_CONFIGURATION"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
module_type	LPU	04_knowledge_base/Groq LPU
specific_module	LP30	04_knowledge_base/Groq LP30
substrate	PCB	PCB

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。