SK Hynix Accelerates HBM4E Sample Production with NVIDIA as First Customer
Alina Collins
SK Hynix will ship seventh-generation HBM4E memory samples to Nvidia as early as June 2026, ahead of its prior "second half" guidance — but Samsung has already delivered samples. Whoever clears customer validation first wins the volume orders.
What is HBM4E, and why the rush?
HBM4E — seventh-generation high-bandwidth memory, a step up in speed and capacity from HBM4 now entering mass production — is the critical companion to AI chips. Larger AI models demand ever more memory bandwidth and capacity.
SK Hynix's latest timeline: samples ship as early as June 2026, no later than July. This means → the schedule has moved forward by several months from the company's earlier "second half" guidance.
Nvidia is the only confirmed customer so far. The chips will go into Nvidia's next-gen AI accelerator Rubin Ultra, slated for a 2027 launch on a 1c-nanometer core-die architecture.
Samsung already moved first — how big is the gap?
Samsung Electronics acted faster: it completed HBM4 mass production in February 2026 and shipped HBM4E samples to customers by late May. In plain terms = Samsung leads SK Hynix by at least a month on HBM4E sample delivery.
Samsung and Nvidia have reportedly reached a long-term agreement covering HBM4E, foundry services, and HBM5 starting in 2027. This means → Samsung is not just winning one sample round — it is locking in a multi-generation partnership.
SK Hynix management says it is "ready to supply at any time," but on the sample-delivery clock, Samsung holds the lead.
What is really at stake in this race?
Industry sources say HBM competition is no longer just about spec sheets. It increasingly turns on shipping timing and customer-validation cadence.
This reflects a key dynamic: whoever puts samples in the customer's hands first → the customer starts validation and design optimization sooner → volume production orders are more likely to follow.
Put simply = on the AI memory track, "ship one step earlier" matters more than "squeeze out one more spec." The sample and production race in Q3 2026 will be the decisive test of each maker's ability to lock in customers.
Content is for reference only, not financial advice.