GB2-0011
① SA Source
- Source: 開啟完整 SA 文章
- Section:
The 4 Rack Scale Form Factors of Blackwell - Line hint:
163
Context Before
Source: SemiAnalysis
Evidence
The per rack power & cooling density is 66kW per rack for a total of 132kW for NVL36 racks * 2.
Context After
The last form factor is the specific rack with a custom “Ariel” board instead of the standard Bianca. We believe this variant will primarily be used by Meta. Due to Meta’s recommendation system training and inferencing workloads, they require a higher CPU core and more memory per GPU ratio in order to store massive embedding tables and perform pre/post-processing on the CPUs.
The content is similar to the standard GB200 NVL72: but instead the Bianca board is swapped for an Ariel board that has 1 Grace CPU and 1 Blackwell GPU. Due to the doubling of Grace CPU content per GPU, this SKU will be more expensive even compared to NVL36x2. Similar to NVL36x2, each NVSwitch tray has 18 1.6T twin-port OSFP cages which connect horizontally to a pair NVL36 rack.
② Atomic Claim
NVL36 每 rack 的 power/cooling density 為 66kW，兩個 rack 合計 132kW。
- Epistemic Mode:
ASSERTED - Mapping Status:
COMPLETE
③ Semantic Frame
{
"attribute": "rack_power_cooling_density",
"context_nodes": [],
"entity": {
"id": "04_knowledge_base/NVL36",
"label": "NVL36"
},
"frame_type": "ATTRIBUTE",
"qualifiers": {
"condition_text": "NVL36x2",
"numeric_mentions": [
"66kW",
"132kW",
"2"
],
"temporal_mentions": []
},
"value": {
"numeric_mentions": [
"66kW",
"132kW",
"2"
],
"value_text": "66kW per rack；兩 rack 合計 132kW"
}
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| entity | NVL36 | NVL36 |
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。