SK hynix samples 12-layer HBM4E as AI memory race moves forward

SK hynix is sampling 12-layer HBM4E with major customers, according to StorageNewsletter. The compact payload cites a maximum speed of 16Gbps per pin and an updated Advanced MR-MUF process that lowers heat resistance by 17% while improving stability. The immediate market signal is roadmap progress rather than volume supply. HBM4E is positioned beyond current HBM4 ramps, and customer sampling gives hyperscalers, accelerator vendors, and memory suppliers an earlier view of performance, thermals, and integration requirements. For pricing, the direction remains supportive for premium memory: AI systems are still pulling suppliers toward high-value stacked DRAM, and each next-generation qualification cycle can keep capacity and packaging attention focused on HBM instead of commodity DRAM.