SA260324R-0257
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Rubin Ultra NVL288 - Line hint:
316
Context Before
The radix of the 28.8T NVLink Switch limits the number of GPUs that each switch can connect while still providing for cross-rack connectivity. Either a higher radix switch will have to be used - or there will have to be a degree of oversubscription in this architecture while potentially adopting a dragonfly-like network topology.
Evidence
This would also require fewer DPs worth of copper cables.
Context After
All current evidence in the supply chain points to NVSwitch 7 being the same bandwidth as NVSwitch 6, but that seems a bit illogical to be frank. Our belief is that NVSwitch 7 is actually 2x the bandwidth and radix of NVSwitch 6, so all-to-all can be done, and architecturally that makes the most sense from a systems perspective.
② Atomic Claim
這樣也會減少所需的 DP 數量與 copper cable content。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"attribute": "CABLE_REQUIREMENT_EFFECT",
"context_nodes": [],
"entity": {
"id": "04_knowledge_base/Copper",
"label": "copper"
},
"frame_type": "ATTRIBUTE",
"qualifiers": {
"condition_text": "This 指涉前一條 hypothetical network alternatives",
"numeric_mentions": [],
"temporal_mentions": []
},
"value": {
"numeric_mentions": [],
"value_text": "上述高 radix／oversubscription topology 會降低所需 DP 與 copper cable content。"
}
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| entity | copper | Copper |
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。