CXMT Forces AI Memory Production Forward Despite 70% Chip Failure Rate Amid China's Supply Crisis

CXMT Advances HBM3E Production Despite Critical Yield Challenges

ChangXin Memory Technologies (CXMT), China's largest DRAM manufacturer, plans to begin limited production of HBM3E within the next two months, despite achieving yields of only 20% to 30%1

1

2

2

. This stands in stark contrast to market leader SK Hynix, which achieves yields of around 70%1

1

. The low manufacturing yields mean that approximately 70% to 80% of chips coming off CXMT's production lines must be discarded or reworked, driving up costs significantly3

3

. CXMT has already sent HBM3E samples to several domestic AI chip designers in two versions: a standard design and an updated version with changes intended to improve yields1

1

. High-bandwidth memory is manufactured by vertically stacking memory chips, enabling rapid data exchange with AI processors—a crucial component for training and running large language models5

5

.

China's AI Memory Shortage Drives Risky Production Strategy

CXMT is pressing ahead with advanced AI memory production despite poor economics because Chinese AI chipmakers have struggled to obtain sufficient advanced memory to increase output1

1

. This decision highlights China's intense shortage of AI memory chips, which are essential to the government-backed push to develop domestic alternatives to Nvidia's AI processors at scale5

5

. The shortage has become so acute that major Chinese chipmakers including Huawei, Cambricon, MetaX, and Iluvatar CoreX raised prices for current and next-generation AI chips by 20% to 50% as memory costs complicated efforts to ramp up production1

1

5

5

. CXMT's HBM3E is expected to cost more than comparable products from overseas rivals, adding further pressure to an already strained supply chain1

1

.

US Export Restrictions Compound Supply Challenges

Washington tightened export controls on certain advanced HBM products bound for China in December 2024, significantly restricting access to foreign-made technology1

1

5

5

. These US export restrictions have pushed Chinese chipmakers to increasingly seek memory through unofficial channels, where it can cost several times more than official pricing1

1

2

2

. The geopolitical challenges extend beyond finished products—US export controls also limit CXMT's access to some of the most advanced chipmaking equipment, making it harder to close the gap with global rivals5

5

. The AI-fueled global memory shortage is hitting China particularly hard as tech companies pour billions into new data centers, with projects like OpenAI Stargate calling for hundreds of thousands more DRAM wafers per month—roughly 40% of global DRAM output3

3

.

Technical Performance Gap Reveals Generation Lag Behind Industry Leaders

In testing, CXMT's HBM3E performance was closer to SK Hynix's previous-generation HBM3 than to the South Korean company's current HBM3E products1

1

2

2

. Technical analysis reveals that CXMT's through-silicon via technology, which connects stacked memory layers, remains immature compared to competitors4

4

. While Samsung used around 5,000 TSVs per layer on HBM2 and SK Hynix used more than 8,000 per layer on HBM3, CXMT is reportedly attempting HBM3E with just 3,000 TSVs per layer across eight layers4

4

. This difficulty in producing HBM illustrates the substantial gap between CXMT and the industry's established leaders—SK Hynix, Samsung Electronics, and Micron Technology—which dominate global supply1

1

.

Market Position Highlights Competitive Disadvantage in Advanced Memory

SK Hynix held 50% of global HBM revenue in the second quarter, according to Counterpoint Research, followed by Samsung with 33% and Micron with 18%1

1

5

5

. Most revenue came from HBM3E, the research firm noted5

5

. While CXMT held a 10% share of global DRAM revenue in the quarter, making it the world's fourth-largest supplier of conventional memory chips, its position in advanced AI memory remains nascent1

1

5

5

. Samsung announced in July that it had expanded HBM4 sales and shipped HBM4E samples to major customers, putting CXMT at least one generation behind in commercial HBM production1

1

2

2

. SK Hynix recently reported that HBM4 had beaten its target yield and would pass HBM3E in shipments and revenue in the fourth quarter2

2

. Products using CXMT's memory could reach the market as soon as 2027, though the company began developing HBM internally as early as 20244

4

. The combined market value of SK Hynix, Samsung, Japan's Kioxia Holdings, and CXMT exceeds $2 trillion, with these companies supplying memory and storage components that account for roughly a third of major tech companies' data-center spending3

3

.