VR2R-0087
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Rubin - Line hint:
73
Context Before
Blackwell Ultra GB300 added 50% more dense FP4 while keeping sparse FP4 FLOPs the same, while AMD’s MI355X stopped supporting structured sparsity on MXFP8, MXFP6 and
Evidence
MXFP4 formats to save silicon area.
Context After
Rubin’s adaptive compression engine in the improved Transformer Engine is a key feature to re-boost naturally sparser inference performance by doing dynamic computation of sparsity in-flight and eliminating zeros in the data stream without zeroing out non-zero values, thus maintaining model accuracy while still boosting performance. This is done automatically on existing models built for Blackwell without the need for a new programming model or specific optimizations.
② Atomic Claim
……MXFP4 formats，以節省 silicon area。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"frame_type": "CLAIM_ONLY",
"qualifiers": {
"condition_text": "承接 VR2R-0086",
"numeric_mentions": [],
"temporal_mentions": []
},
"reason": "EXTRACTION_FRAGMENT_CONTINUES_PRIOR_MI355X_SPARSITY_CLAIM",
"statement": "……MXFP4 formats，以節省 silicon area。"
}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。