Samsung's Nvidia Memory Win Comes With a TSMC Asterisk

Samsung Electronics investors got two very different stories on the same day — and the trick is not to confuse them. A report out of Korea suggests Samsung has agreed to a Nvidia request that would put rival TSMC at the center of its custom AI memory supply chain, while a separate set of media reports points to a foundry business running at two speeds. Neither development is confirmed, and neither should be read as a signed order.

The Nvidia request, and what it actually covers

According to Insight Korea, Nvidia has asked its three memory suppliers — Samsung, SK hynix and Micron — to build the base chips for its custom NVHBM on TSMC's 3-nanometer process. The goal is a uniform design and fewer separate quality checks. A Samsung representative declined to confirm any custom supply plans, saying only that the existing HBM roadmap is being followed. The reported agreement therefore remains an unconfirmed press account, not an announced contract.

The distinction matters because the base chip is one component of the memory product, not the whole of Samsung's memory output. The Seoul Economic Daily reports that NVHBM is built on HBM4E, with Nvidia shifting the memory controller onto the base die. Any cooperation would thus cover a specific custom building block rather than Samsung's broader memory production.

Samsung's own HBM4 and HBM4E continue to use internally manufactured 4-nanometer base chips, per Insight Korea, and HBM4 is already in mass production. Memory shipments to customers such as AMD are likewise planned on Samsung's own base dies. The company is also weighing whether its foundry could take over NVHBM base-chip production if TSMC's capacity falls short — a possible fallback, not a confirmed order.

Foundry: full at 4nm, slow at 2nm

The contract-manufacturing picture is mixed. Media reports say Samsung's 4nm capacity is practically fully utilized, while the company hunts for new 5nm customers. Contracts with global technology groups for 2nm production, by contrast, are slipping. High utilization is a positive operating signal, but it is not the same as a signed deal on more advanced nodes — they are different technologies, and lumping them together misreads the business.

Tuesday's selling pressure had a wider backdrop. Doubts about the returns on AI investments are weighing on other South Korean chip names too, alongside concerns about financing the buildout and the durability of semiconductor profits. The 3.0% daily decline cannot be pinned on the foundry alone.

A qualified memory win

One genuinely positive thread: media reports dated October 9 said Samsung's twelve-layer HBM4E memory passed quality validation at Nvidia and at major data-center operators. Passing a customer check is progress, but it yields no concrete volumes and no added revenue on its own. Set against the foundry delays, the reported customer projects do not add up to a single coherent picture.

What does look strong is the demand backdrop. KB Securities estimates that roughly 80% of Samsung's planned 2027 memory output is locked up in long-term supply contracts. Five-year agreements cover about 70% of planned DRAM and NAND production, and for HBM the entire planned volume is under contract — all KB Securities estimates. The brokerage also expects average HBM selling prices to rise 100–150% in 2027 versus 2026, a forecast that speaks to pricing momentum but says nothing about the terms of any TSMC arrangement.

What to watch on October 29

Samsung put preliminary third-quarter 2026 group revenue at about KRW 195 trillion and operating profit at about KRW 107.4 trillion — expectations, not final figures. The earnings conference is scheduled for October 29 at 10:00 KST, the next announced checkpoint for judging the business.

The through-line for investors: Samsung's memory outlook and the success of its own foundry are not the same bet. A memory order routed through TSMC would still leave Samsung supplying the product — while handing part of the manufacturing to a competitor. Until custom supply plans are confirmed, that separation is the story.