Apple is facing a DRAM supply constraint that threatens iPhone 18 launch momentum.

Apple is facing a DRAM supply constraint that threatens iPhone 18 launch momentum. Tom's Hardware reports that roughly $1 billion in Apple processor wafers are sitting at TSMC awaiting packaging because DRAM is unavailable. The A20 Pro and C2 chips, built on TSMC's N2 process, require advanced WMCM packaging that bundles DRAM, and memory supply has been sold out through 2027 by Micron, SK hynix, and Samsung. Apple's primary DRAM supplier, Micron, along with competitors, has locked capacity via long-term agreements, leaving Apple scrambling.

Separately, TechNode reports Apple is considering China's CXMT as an LPDDR5X supplier, but talks have hit a pricing hurdle. CXMT is seeking prices at or above Samsung/SK hynix quotes, citing strong domestic demand from Huawei and Xiaomi. No supply agreement has been announced.

This DRAM shortage is not isolated to Apple. LPDDR5X is used in AI accelerators from Nvidia and AMD, so the constraint spills over to the AI-infra supply chain. For Apple specifically, the shortage could pressure iPhone 18 shipments beyond initial launch, despite Apple's stated confidence. The company plans ~200 million units over the device's lifespan.

What the sources said:

• TechNode: "CXMT is reportedly seeking prices at or above quotes from Samsung Electronics and SK hynix rather than accepting Apple’s push for lower prices."
• Tom's Hardware (quoting Culpium): Apple is "scrambling for memory supply ahead of release."
• Tom's Hardware: "Micron (along with the other major memory players) has reportedly sold capacity for DRAM and HBM through 2027."

Bottom line: Apple faces a memory-driven supply chain bottleneck that could delay or reduce iPhone 18 shipments, while memory suppliers retain pricing power. TSMC's packaging capacity is also a gating factor, and the squeeze extends to AI hardware makers competing for the same LPDDR5X supply.