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Research|TPU 8t/8i and Virgo Network: 自从TPU v4引入ICI网络以来最大的网络升级，optics的又一次大胜利，而且我们早就预告了
Andy
Google's TPU 8i/Virgo make OCS mandatory and double optical links, lifting transceiver and laser ASPs.
这次把 Google 的两篇技术blog（Virgo network Introducing Virgo Network megascale data center fabric | Google Cloud Blog和 TPU 8t / 8iTPU 8t and TPU 8i technical deep dive | Google Cloud Blog）看，发现印证了非常多我们之前已经预告的内容。
https://funda.ai/reports/deepai-infra-2026-shifting-from-brain
https://funda.ai/reports/deeplite-googles-newly-introduced
几个月前，在我们那篇关于 in-rack switch tray 的分析里，我们当时试图把一个关键误区拆开：Google 这次升级，真正动的不是 3D torus，而是 DCN，也就是 scale-out 这张网。我们当时写得很直接——
“the in-rack switch tray represents a change in this DCN network, not in the scale-up network”
以及更进一步：
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