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Macronix’s ROM phase-out: what the figures establish for Switch game cards

ROM fell to 5% of Macronix’s parent-company product sales. That shift and Nintendo’s existing game-key cards answer different questions about physical games.

TechKili3 min read
A plain black chip package on a grey work surface, with the curved edge of a silver disc behind it.
TechKili · Conceptual semiconductor illustration generated with Cloudflare Workers AI FLUX.2 klein; not a Macronix product photograph.
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Macronix's shift away from ROM is a material change for a supplier associated with Nintendo game cards, but its results do not announce the end of physical Switch games. The clearest evidence is a changing sales mix: ROM accounted for 5% of the parent company's product sales in the third quarter of 2026, compared with 26% a year earlier.

The company's results presentation is dated October 27. Taipei Times reported on October 29 that chairman Miin Wu described a gradual phase-out of ROM production. Kotaku's originating coverage followed on November 4. Those dates should not be mistaken for a newly announced, immediate stop to all cartridge supply.

ROM is shrinking within a growing memory business

Page 14 of Macronix's presentation labels its product-sales breakdown as parent-company data. NAND represented 47% and NOR 46% in the quarter, alongside ROM's 5%. ROM revenue fell 39% year on year, but rose 9% against the previous quarter. A lower share and an annual decline therefore do not mean that quarterly ROM sales had already fallen to zero.

The same deck describes strong data-centre demand for high-density NOR and a structural shortage in SLC NAND and eMMC. These are company assessments of its markets. They explain the commercial context for prioritising other memory products without establishing which Nintendo game will use which physical format.

A supplier's direction is not a publisher's format decision

Taipei Times reports that planned new capacity is intended for NAND products and that Macronix is gradually leaving ROM production. Its account links the remarks to the earnings conference, rather than to an announcement of a specific Switch title changing format.

For players, the missing information is title-level: what data a particular card contains, whether a download is required and what its publisher has actually committed to. The documents examined here do not establish a Nintendo-wide cartridge discontinuation date or a resulting retail-price increase. Those would require their own evidence.

Check what the individual card contains

Nintendo's official Game-Key Card overview distinguishes regular Switch 2 game cards from game-key cards. A game-key card does not contain the full game data: it enables a download that needs internet access and sufficient system or microSD Express storage. Nintendo says the required space is indicated on the packaging.

After downloading, the card must remain inserted to play. Nintendo says the game can then be started without an internet connection; that does not remove any online requirement of the game itself. A physical card and a self-contained offline copy are therefore different questions.

If keeping the game data on the card matters to you, check the exact edition's packaging and publisher documentation before choosing it. Macronix's sales mix is useful supply-chain context, but it cannot answer that question for an individual release.

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