Nintendo's Cartridge Chip Supplier is Leaving the ROM Business as AI Data Center Demand Takes Over

Macronix is phasing out ROM chip production to prioritize more profitable memory components, raising questions about the future cost and availability of physical Nintendo Switch games.

Nintendo's physical game cartridge business could take another hit as one of its key memory chip suppliers prepares to exit the ROM business. Macronix in Taiwan is slowly phasing out ROM production and is now focused on more profitable memory technologies in high demand in AI data centers. This has raised concerns among Nintendo fans about the future of physical game releases, as the industry increasingly moves toward digital.

The issue came to light through financial analyst David Gibson, who shared details of Macronix's latest financial results and new business strategy. The company has announced it will stop developing all new ROM products and will move away from the gaming business over time. Because Macronix has been a major supplier of the memory chips used in physical Nintendo Switch game cartridges, this is a significant development for Nintendo's current supply chain.

The financials also help explain why the company is re-evaluating its focus. ROM products were only responsible for 5% of Macronix's revenue in Q3 2026 (down 39% on the prior year). Demand for other memory products has risen significantly. NOR flash and NAND are clearly more attractive opportunities as the industry responds to the data center and AI infrastructure requirements.

At the latest earnings call, Chairman and CEO Miin Wu pointed to strong demand for NOR memory in the data center space, with customers actively asking for more manufacturing capacity. With capacity at a premium, Macronix is clearly more interested in allocating its capacity to the products that present the strongest business opportunities. The $1.2bn planned investment in additional capacity clearly signals the company's intent to build out its position in the memory market.

However, the announcement doesn't mean Nintendo will stop making physical game cartridges straight away. There's a key distinction: Macronix has primarily supplied the ROM chips for the original Nintendo Switch cartridges. Their exit doesn't necessarily mean physical Switch 2 cartridges will vanish. Hardware analysis and teardowns point to other suppliers (Rohm-associated companies in particular) as being the likely suppliers of the Switch 2 cartridges.

The exact manufacturing details are, of course, not 100% clear, so the longer-term implications are still very much up in the air.

Nintendo also has other suppliers that it can draw on to meet its cartridge manufacturing requirements. So it's not at all reliant on Macronix to keep physical game production going. That said, losing an established supplier could add pressure to the manufacturing process, especially if alternative suppliers can't step in immediately with sufficient capacity at competitive prices.

The bigger issue is the increasing impact of AI infrastructure on the semiconductor industry. Data centers will need massive amounts of memory and storage to run the workloads they'll be handling. As the AI industry continues to invest, the incentive for semiconductor manufacturers to supply the tech sector will be much greater than to supply more marginal consumer electronics.

Macronix's decision is a case in point for how these shifting priorities can eventually affect an industry that has traditionally relied on a specialist hardware supplier. For Nintendo, the fallout could go well beyond manufacturing the cartridges themselves. If sourcing cartridge components costs more, publishers will eventually face higher production costs for their physical games.

Smaller developers and publishers would be most affected, as cartridge manufacturing costs factor into their decisions to go physical. Some may look at whether it's worth making a physical version at all, and others may take an alternative route. Game-Key cards could also come into play here. They're an alternative to the traditional cartridge because the game isn't actually on the card itself; you have to download it via the internet.

They do provide a physical product for collectors, but they don't offer the same sense of ownership as a traditional game cartridge.

If physical manufacturing becomes prohibitively expensive, the publisher may find the Game-Key format more attractive for maintaining a retail presence without the same level of cartridge storage. Nintendo's position is interesting because physical games are still a significant part of their business. They've made it clear in the past that they have no intention of giving up on physical game sales, even as the industry continues to move toward digital.

Their physical software sales actually constitute a bigger proportion of their business than they do for a number of the other publishers. For the moment, Macronix's decision shouldn't be read as Nintendo being all set to walk away from physical media. They still have other manufacturing partners, and the short-term impact on Switch 2 cartridges seems limited given what we know right now.

It does, though, underline a bigger issue facing the industry as a whole: the same semiconductor capacity used to make traditional gaming products is increasingly being funneled into the exploding AI market. Ultimately, the future of physical Nintendo games will depend on how well it manages its supplier base, manufacturing costs, and cartridge capacity. Macronix exiting the ROM business may not be the death knell for physical Switch games in any immediate sense. Still, it underscores that the AI industry's appetite for memory will affect the physical gaming market over time.