VR2R-0550_r1

VR2R-0550

① SA Source

• Source: 開啟完整 SA 文章
• Section: Scale-Up Network - NVLink 6
• Line hint: 462

Context Before

Each VR NVL72 Switch tray contains four NVLink 6 Switch ASICs and one system management module. The design of the Rubin NVLink 6 Switch tray is also simpler and relatively seamless compared to the first Oberon NVLink 5 Switch released for GB200 because Rubin NVLink 6 Switch trays will not use flyover cables.

Evidence

As such, all NVLink signals will run over the PCB.

Context After

The NVLink 6 Switch board is liquid cooled and will be covered with a cold plate, which is a single module. Connected to the NVSwitch tray is the system management module (SMM) that comes with a CPU and acts as a host to the switch tray. The switch tray to SMM connection uses flyover cables, but this is the only flyover cable connection required in the entire Vera Rubin NVL72 system.

② Atomic Claim

因此，所有 NVLink signals 都會走 PCB。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "additional_nodes": [],
  "frame_type": "RELATION",
  "object": {
    "id": "04_knowledge_base/PCB",
    "label": "PCB"
  },
  "predicate": "ROUTES_SIGNALS_OVER",
  "qualifiers": {
    "condition_text": "NVLink 6 Switch tray context",
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "subject": {
    "id": "04_knowledge_base/NVLink",
    "label": "NVLink"
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
subject	NVLink	NVLink
object	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。