The company that makes nearly everyone's processors may be about to make their memory too. TSMC is considering expanding into advanced memory manufacturing, according to a report from The Information summarized by The Verge, and it has reportedly begun drawing up plans for 3D DRAM at the request of its biggest customer, Nvidia.

Two people with direct knowledge of the matter told The Information that the work is led by Hsu Kuo-chin, a TSMC vice president who oversees advanced packaging, per Reuters' account of the report. TSMC could build new factories or buy an existing plant and convert it, much as Micron did with a fab purchase this year. It's not clear when production could start. TSMC and Nvidia didn't immediately respond to Reuters' requests for comment, so treat all of this as unconfirmed.

3D DRAM stacks memory cells vertically instead of spreading them across a single layer, packing in more capacity, bandwidth and power efficiency. That's exactly what AI accelerators are starving for. The Next Web notes that in October Nvidia reportedly asked Samsung, SK Hynix and Micron to build the base layer of its custom HBM memory on TSMC's 3nm process, so TSMC is already creeping toward the memory stack.

Why it matters: Memory is the choke point. Data centers are soaking up supply, prices are sky-high, and Nvidia depends on three suppliers that have dominated the market for years. A credible fourth source, built by the one foundry Nvidia already trusts with its GPUs, is leverage. For TSMC, it's a way to capture more of every dollar spent on an AI server.

The caveats: Memory is a famously cyclical, lower-margin business, and TSMC would be walking into a field where SK Hynix alone is reportedly planning to spend $720 billion on new plants. Building a competitive DRAM operation is also years of work, so this wouldn't ease today's shortage.

What to watch: TSMC's October sales report next week and its 2027 guidance in mid-January, where any capital-spending shift toward memory would show up first. Investors didn't wait: Yahoo Finance reports TSMC shares rose about 5% on the news.

— via The Verge