VR2R-0447
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Rack Level Infrastructure: Thermal - Line hint:
374
Context Before
Although NVIDIA initially did not formally publish full specifications for Vera Rubin’s liquid cooling system, we believe the platform will support maximum coolant return temperatures up to 65C.
Evidence
This aligns with Nvidia’s warm-water operating envelope, and while the exact implication for delta-T depends on the chosen supply setpoint and flow control strategy, we can expect a slightly tighter delta-T.
Context After
The pressure envelope is expected to be unchanged versus GB200, with maximum operating pressure of 72 psig (5 bar) and minimum burst pressure of 217 psig (15 bar), aligning with OCP’s MGX rack-level liquid-cooling specification.
② Atomic Claim
這與 Nvidia 的 warm-water operating envelope 一致；實際 delta-T 取決於 supply setpoint 與 flow-control strategy，但 SemiAnalysis 預期 delta-T 會略微收窄。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"attribute": "WARM_WATER_DELTA_T_EXPECTATION",
"context_nodes": [],
"entity": {
"id": "02_companies/NVDA",
"label": "Nvidia"
},
"frame_type": "ATTRIBUTE",
"qualifiers": {
"condition_text": "exact delta-T depends on supply setpoint and flow-control strategy",
"numeric_mentions": [],
"temporal_mentions": []
},
"value": {
"numeric_mentions": [],
"value_text": "warm-water operation is expected to produce a slightly tighter delta-T depending on supply setpoint and flow-control strategy."
}
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| entity | Nvidia | NVDA |
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。