Micron (MU)
Published 2026-03-17 • by semianalysis
Thesis Summary
Micron is likely to lose HBM4 market share in Nvidia's Rubin platform due to challenges meeting performance requirements, positioning Samsung and SK Hynix as stronger contenders.
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Detailed Deep Dive
While Nvidia is targeting 22TB/s, we understand that memory suppliers are having challenges hitting Nvidia’s requirements and we see it likely that initial shipments will come in slightly below at closer to 20TB/s. We have discussed the implications to SK Hynix, Samsung, and Micron extensively for Accelerator and HBM model subscribers. Micron is well behind Samsung and Hynix and we believe they are effectively out of the picture for Rubin HBM4. We have more details on qualifications and pin speeds in the Accelerator and HBM model