Samsung Electronics has reached an 80% production yield on its HBM4 memory chips, according to a report published by Seoul Economic Daily — a threshold the chip industry calls the "golden yield," at which manufacturing becomes reliably profitable rather than a costly work in progress. Samsung reached the mark roughly six months after starting mass production, up from yields below 60% in February.
High-bandwidth memory, or HBM, stacks layers of DRAM to feed data to AI accelerators faster than conventional memory can, and it has become one of the tightest bottlenecks in AI hardware supply chains as demand for chips from Nvidia and AMD has outpaced production. Samsung also reported reliability-test yields above 70% on its newer HBM4E variant, which it is racing to bring to market alongside the base HBM4 generation.
Closing the gap with SK Hynix
The yield improvement matters because Samsung has spent much of 2026 playing catch-up. SK Hynix has held the dominant share of the HBM market, and Nvidia CEO Jensen Huang confirmed in June that Samsung, SK Hynix and Micron had all cleared certification to supply HBM4 for Nvidia's next-generation Vera Rubin platform, ending months of uncertainty over whether Samsung's chips would pass qualification at all. A separate report from Bloomberg earlier this year detailed Samsung's push through Nvidia's final certification phase.
Analysts at UBS project the balance of power could shift further in 2027, with Samsung edging ahead of SK Hynix in HBM shipment share, 41% to 39%, after trailing at roughly 48% to a smaller share this year. Samsung has said it is targeting close to 38% of the overall HBM market by the end of 2026, and that HBM4 revenue in the current quarter should more than triple from the prior quarter as shipments ramp.
Samsung has attributed the faster-than-expected yield gains to a "turnkey" approach that coordinates its memory, foundry and packaging divisions from the design stage, rather than treating each step as a separate handoff. Executives have framed that integration — not just raw process technology — as the company's core advantage in a market where SK Hynix has typically been regarded as the technical leader.
With HBM4 output still ramping and Hot Chips 2026, a major chip-architecture conference, set for later this month at Stanford University, the manufacturing race is shifting from who can design the fastest memory to who can produce enough of it. For Nvidia and AMD, which depend on a diversified supplier base to avoid shortages, a credible third source at scale is as significant as any single spec improvement.
