Samsung HBM to Take 30% of DRAM Capacity by 2027 - SNS Insider

Samsung's decision to dedicate 30% of DRAM wafer capacity to HBM by 2027 is not a product roadmap—it is a capacity lock-in that signals the AI memory war has entered a zero-sum phase. TSV stacking and advanced packaging overhead consume disproportionate die area per bit, structurally squeezing conventional DDR5 and LPDDR output. The contract price firmness observed since mid-2025 is not cyclical; it is the mechanical consequence of HBM cannibalizing standard DRAM supply. Strategically, SK Hynix has already built switching costs through its NVIDIA HBM3E qualification. Samsung's 30% target reads as defensive positioning to secure second-source status rather than an offensive leap. The real inflection sits in the 12-to-24-month window: HBM4's base-die migration toward 1β nm will reset the yield curve. If Samsung's 12-high stack cannot match Hynix's 16-high yield trajectory, that 30% figure becomes a vanity metric. For downstream AI ASIC designers—Broadcom, Marvell, and hyperscaler custom silicon—the bargaining power over HBM pricing is being eroded by the three-supplier capacity race. Expect HBM spot premiums to compress below 15% by 2026 as oversupply risk in the HBM segment collides with persistent accelerator demand.