Macronix Exits ROM Business, Leaving Nintendo Short a Switch Cartridge Supplier

Macronix, the Taiwanese chipmaker that supplies mask ROM for Nintendo's Switch cartridges, will phase out ROM production and redirect its capacity toward NOR flash memory for data centers. The company announced the shift during its Q3 2026 earnings call, as Taipei Times reports, and the decision leaves Nintendo searching for a new source for its game cards at a moment when the Japanese company still depends heavily on physical software sales.

The financial logic behind the exit is stark. Macronix's ROM revenue fell 39 percent year-over-year in the third quarter of fiscal 2026. Over the same period, revenue from NOR flash memory rose 158 percent, and NAND revenue surged 768 percent. Mask ROM, a mature and cheap technology well suited to write-once game cartridges, cannot compete for fab capacity against memory products that data center customers are scrambling to buy.

Macronix chairman and CEO Miin Wu described the demand directly during the earnings call. "Demand for NOR used in data centers is very robust. Customers are chasing us for more capacity, demanding that we deliver more NOR flash solutions for data centers," Wu said. The company also expects chip price hikes to persist, according to Taipei Times. Higher prices strengthen the case for Macronix to keep reallocating wafer capacity away from low-margin ROM.

The takeaway: a niche legacy product is losing its fab space because AI-driven data center memory pays far better per wafer.

Why does Nintendo care more than its rivals?

Nintendo stands apart from the wider industry shift toward digital distribution. Physical titles accounted for 38.5 percent of Nintendo's games sales as of August, a share the company disclosed itself and one it noted is higher than at competitors such as Capcom. Cartridge supply is therefore not a side issue for Nintendo; it touches more than a third of its software business.

The company has also stated its position plainly. Nintendo said recently that it has "no plans" to abandon physical games. That commitment contrasts with Sony, which has announced it will stop producing physical game discs starting in January 2028.

The takeaway: Nintendo's cartridge supply chain matters commercially in a way that disc supply no longer does for Sony.

Is this part of a wider pattern?

Macronix's ROM exit fits a broader reallocation of memory capacity toward AI infrastructure. Nearly a year before Macronix's announcement, Micron shut down Crucial, its consumer RAM and SSD brand, to concentrate on meeting AI data center demand. In both cases, chipmakers with limited fab capacity chose server customers over consumer markets, even established and profitable ones.

For Nintendo, the pattern raises a concrete question: which supplier will take over ROM production, and on what terms. Few fabs still run mask ROM at scale, because the technology serves a shrinking set of applications. Nintendo has not named a replacement supplier, and Macronix has described its phase-out as gradual, which gives the console maker time but not certainty.

The pricing environment adds pressure. If Macronix expects chip price hikes to persist across its portfolio, any successor supplier will likely demand more per cartridge chip than Nintendo has been paying. Nintendo sells hardware at thin margins and prices its first-party games uniformly, so rising component costs bite either into cartridge margins or into retail pricing.

The takeaway: consumer electronics firms without their own fabs are finding that AI demand sets their supply terms, not their own volume.

What happens next?

Nintendo's stated commitment to physical media means it must secure ROM supply, absorb higher costs, or redesign its game cards around a different memory technology. Macronix, for its part, will keep chasing data center revenue while its ROM line winds down. If NOR prices stay strong and customers keep pressing for capacity, expect further consumer memory products to lose their fab space to the data center build-out.