VR2-0280
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Compute Tray Topology - Line hint:
371
Context Before
Source: Nvidia VR NVL72 BoM and Power Budget Model ↗
Firstly, the connection between the GPU and the ConnectX NICs evolved from GB200 to GB300 then to Vera Rubin. For GB200, the GPU does not have direct access to the ConnectX-7. Instead, B200 connects to Grace CPU via C2C connection then the Grace CPU talks to the ConnectX-7 over PCIe 5. For GB300, Nvidia introduced NIC direct to ConnectX-8, which allows the B300 GPU to communicate directly with the ConnectX-8 NIC without going through the Grace CPU.
Evidence
Rubin connects to Vera via C2C link, then Vera will connect to ConnectX-9 via PCIe6 lanes
Context After
Secondly, the local NVMe storage for Rubin has been moved to a different location from that of NVMe storage in Grace Blackwell. Previously, local NVMe storage was managed by BlueField-3. For VR NVL72, the local NVMe storage is physically on the Orchid module managed by the ConnectX-9.
② Atomic Claim
Rubin 先透過 C2C link 連接 Vera，再由 Vera 透過 PCIe6 lanes 連接 ConnectX-9。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"frame_type": "NARY_RELATION",
"participants": [
{
"node": {
"id": "04_knowledge_base/Chip-to-Chip Interconnect",
"label": "C2C"
},
"role": "endpoint_or_system"
},
{
"node": {
"id": "04_knowledge_base/PCIe",
"label": "PCIe6"
},
"role": "connected_entity"
},
{
"node": {
"id": "04_knowledge_base/ConnectX-9",
"label": "ConnectX-9"
},
"role": "connected_entity"
},
{
"node": {
"id": "04_knowledge_base/Vera Rubin",
"label": "Rubin"
},
"role": "context_entity"
}
],
"qualifiers": {
"condition_text": null,
"numeric_mentions": [
"9"
],
"temporal_mentions": []
},
"relation_type": "CONNECTS_TO"
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| endpoint_or_system | C2C | 04_knowledge_base/Chip-to-Chip Interconnect |
| connected_entity | PCIe6 | PCIe |
| connected_entity | ConnectX-9 | ConnectX-9 |
| context_entity | Rubin | 04_knowledge_base/Vera Rubin |
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。