SA260324R-0254
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Rubin Ultra NVL288 - Line hint:
314
Context Before
If Rubin Ultra NVL288 is deployed, each Rubin Ultra GPU will have a scale-up bandwidth of 14.4Tbit/s uni-di, requiring 144 DPs of cables to connect the NVLink 7 switches. 72 DPs per GPU times 288 GPUs means a total of 20,736 additional DPs required to connect this larger world size domain.
Evidence
This entails a lot of cables, so it is an upper bound of how much cable content could be used.
Context After
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. This would also require fewer DPs worth of copper cables.
② Atomic Claim
這會需要大量 cable，因此可視為 cable content 使用量的上限估計。
- Epistemic Mode:
HYPOTHETICAL - Mapping Status:
PARTIAL
③ Semantic Frame
{
"frame_type": "CLAIM_ONLY",
"qualifiers": {
"condition_text": "承接 20,736 additional DPs 的 NVL288 scenario",
"numeric_mentions": [],
"temporal_mentions": []
},
"reason": "CABLE_UPPER_BOUND_DEPENDS_ON_PRIOR_NVL288_CONFIGURATION",
"statement": "這會需要大量 cable，因此可視為 cable content 使用量的上限估計。"
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| — | — | — |
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。