NIEK2-0232
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Oberon and Kyber Updates, Larger World Sizes Introduced, More Networking Updates - Line hint:
283
Context Before
Kyber midplane PCB (GPU side). Source: Nvidia, SemiAnalysis
Evidence
A copper backplane will still be used for scale-up networking within the racks however
Context After
Moving back to the Kyber Rack, each Rubin Ultra logical GPU offers 14.4Tbit/s uni-di of scale-up bandwidth, using an 80DP connector (72 DPs used x 200Gbit/s bi-di channel = 14.4Tbit/s) per GPU for connectivity to the midplane board. Connecting all 144 GPUs in an all-to-all network will require 72 NVLink 7.0 Switch Chips running at 28.8Tbit/s uni-di of aggregate bandwidth each.
② Atomic Claim
不過機櫃內的 scale-up networking 仍會使用 copper backplane。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"frame_type": "NARY_RELATION",
"participants": [
{
"node": {
"id": "04_knowledge_base/Scale-up networking",
"label": "scale-up networking"
},
"role": "user_or_subject"
},
{
"node": {
"id": "04_knowledge_base/Copper",
"label": "copper"
},
"role": "used_entity"
},
{
"node": {
"id": "04_knowledge_base/Backplane",
"label": "backplane"
},
"role": "used_entity"
}
],
"qualifiers": {
"condition_text": null,
"numeric_mentions": [],
"temporal_mentions": []
},
"relation_type": "USES"
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| user_or_subject | scale-up networking | 04_knowledge_base/Scale-up networking |
| used_entity | copper | Copper |
| used_entity | backplane | Backplane |
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。