SA260324R-0265
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Rubin Ultra NVL576 - Line hint:
332
Context Before
To push the scale up world size beyond 144 GPUs and across multiple racks, optics are needed as we are approaching the maximum compute density that is within the reach of copper. Rubin Ultra NVL576 is now on the roadmap with 8 racks of lower density Oberon.
Evidence
Optics will be required for the inter-rack connections, though strictly speaking it isn’t confirmed whether this will be with pluggable optics or with CPO, though CPO seems much more likely.
Context After
The current Blackwell NVL576 prototype “Polyphe” uses pluggable optics.
② Atomic Claim
inter-rack connection 需要 optics，但目前尚未確認會使用 pluggable optics 還是 CPO；其中 CPO 看起來可能性高得多。
- Epistemic Mode:
EXPECTED - Mapping Status:
COMPLETE
③ Semantic Frame
{
"comparison_expression": "inter-rack optics 尚未確認採 pluggable optics 或 CPO，但 CPO 明顯較可能。",
"entities": [
{
"id": "04_knowledge_base/Pluggable optics",
"label": "pluggable optics"
},
{
"id": "04_knowledge_base/CPO",
"label": "CPO"
}
],
"frame_type": "COMPARISON",
"metric": "LIKELIHOOD_FOR_INTER_RACK_OPTICS",
"operator": "CPO_MORE_LIKELY_THAN",
"qualifiers": {
"condition_text": "inter-rack connections require optics",
"numeric_mentions": [],
"temporal_mentions": [
"目前"
]
}
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| entity | pluggable optics | 04_knowledge_base/Pluggable optics |
| entity | CPO | CPO |
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。