SemiAnalysis

We Visited China’s Stargate in Inner Mongolia
A wind-powered 800MW campus,
120MW built within a year,
a 5MW SST-native 800V DC pilot and a cooling design without central chillers

newsletter.semianalysis.com/p/we-visited-c…

After DeepSeek V4.1 Flash, Xiaomi MiMo is moving to a causal encoder-decoder for its next-gen models.

HySparse2: prompts run through only 25 of 49 layers. Decoder KV is projected from encoder states.

At 1M context vs MiMo-V2: 5x less prefill compute, 4.5x smaller KV cache.

We think tighter GPU financing is more likely to support rents than create a compute glut, because it slows new deployments while demand remains tight. (1/3)🧵

Brand new ultra low CTE glass cloth - Vlex, it is an ultra-low thermal expansion glass cloth being developed by Nittobo for the next generation of larger semiconductor package substrates. As substrates grow, controlling dimensional changes during heating and cooling becomes increasingly important. Vlex is designed to help manufacturers manage that challenge by lowering the coefficient of thermal expansion, or CTE, of the glass reinforcement used in copper-clad laminates. (1/2)🧵

Nvidia Rubin Teardown! Direct from SemiAnalysis: in the lab, on the bench. Reach out to sales@semianalysis.com now to learn how you can get early access to the hardest hitting insights in DC/AI hardware.