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英偉達 Vera Rubin 平台內存成本占比升至 62%,SOCAMM2 成主要驅動

2026-08-10 11:46:29

ChainCatcher 消息,据瑞银对 Vera Rubin 超芯片物料清单(BOM)的分析,內存半導體在該平台總成本中的占比已升至約 62 %,較上一代 Blackwell Ultra(GB300)的 53 % 大幅提升。Vera Rubin 超芯片(含 1 顆 Vera CPU 和 2 顆 Rubin GPU)總成本約 38,902 美元,其中內存相關成本達 24,297 美元。HBM4 成本約 4,943 美元(占總成本 12.7 %),而連接 CPU 的 SOCAMM2 成本約 19,355 美元(占總成本 49.8 %),成為內存成本上升的核心驅動。

SOCAMM2 是基於低功耗 DRAM LPDDR5X 的伺服器內存模組,支持單 CPU 最高 1.5TB 容量。Vera Rubin NVL72 機櫃(含 72 顆 Rubin GPU 和 36 顆 Vera CPU)共搭載 74.7TB DRAM,其中 HBM4 為 20.7TB,CPU 用 LPDDR5X 達 54TB,單機櫃的 LPDDR 用量相當於約 4,500 部高端智能手機。不過,受 LPDDR5X 及 HBM4E 供應不確定性影響,英偉達正考慮下調下一代 Rubin Ultra 的 HBM 配置。

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