机构：HBM4受规格提升与英伟达策略调整影响，预估量产时程延至2026年第一季度末

Core Insights - NVIDIA is adjusting the specifications for its Rubin platform's HBM4, increasing the Speed per Pin requirement to above 11Gbps, which necessitates design revisions from three major HBM suppliers [1] - The demand for NVIDIA's previous generation Blackwell products has exceeded expectations due to the AI boom, leading to a rescheduling of the Rubin platform's mass production timeline [1] - These factors have resulted in a delay for the HBM4 ramp-up, with mass production now expected to begin as early as the end of Q1 2026 [1]