The Taiwanese semiconductor and non-volatile memory manufacturer Macronix is phasing out its ROM production, according to its CEO and chairman, Miin Wu. That’s potentially terrible news for fans of physical games, as Macronix is Nintendo’s main ROM supplier for Nintendo Switch cartridges.

This was spotted by MST Financial’s Senior Analyst David Gibson in a post on X earlier today, but the news itself actually stems from Macronix’s Q3 2026 results which the company shared on October 27. During the presentation, Macronix CEO Miin Wu revealed that the company had enjoyed a “record-high” net profit of roughly $337 million for its Q3 2026 period. But in a translation provided by the Taipei Times, Wu stated that Macronix’s customers’ “demand for NOR used in data centers” was primarily the source of its record-high profits, while also noting that its ROM sales had dwindled by a whopping 39 percent over the past year.

1/4 Nintendo's main memory chip maker is quitting the Switch business
Macronix, which makes the ROM chips in Switch 1 and Switch 2 game memory cards, is phasing out that business. There will be no new ROM products, and Q3 is the last quarter it reports ROM sales separately.

As ROM chip sales only made up five percent of Macronix’s sales in Q3 2026, down from 26 percent in Q2 2025, Wu stated that the company has already begun gradually phasing out ROM production in favor of delivering “more NOR flash solutions for data centers” and “allocating capacity to NAND, a high-growth segment that will drive Macronix’s long-term expansion.”

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