ChangXin Memory Technologies, commonly known as CXMT, is a Chinese manufacturer of dynamic random-access memory. It designs, develops, manufactures and sells DDR memory for PCs and servers and low-power LPDDR memory for smartphones and other mobile devices. In 2025, the company publicly presented expanded DDR5 and LPDDR5X product portfolios.
This article explains what CXMT does, its current product lineup, the difference between CXMT and YMTC, its Hefei and Beijing manufacturing sites, competitors and U.S. regulatory risks. Confirmed company information is separated from third-party production and market-share estimates.
CXMT in brief
- Chinese DRAM manufacturer founded in 2016
- Handles DRAM design, research and development, production and sales
- Products include DDR4, DDR5, LPDDR4X and LPDDR5/LPDDR5X
- Official history identifies Fab A in Hefei and Fab C in Beijing
- Privately held, so investors cannot directly buy CXMT shares on a stock exchange
What is CXMT?
CXMT stands for ChangXin Memory Technologies. According to the company’s official profile, it was founded in 2016 and manufactures DRAM for phones, PCs, tablets, servers and other products. Its activities cover design, R&D, production and sales rather than manufacturing alone.
| Brand | CXMT |
|---|---|
| English name | ChangXin Memory Technologies |
| Chinese names | 長鑫存儲 / 長鑫科技集団 |
| Founded | 2016 |
| Main location | Hefei, Anhui Province, China |
| President | Mark Cao, as identified on the official English website |
| Business | DRAM design, research and development, manufacturing and sales |
| Listing status | Privately held |
| Products | DDR4, DDR5, LPDDR4X, LPDDR5/LPDDR5X and memory modules |
Older profiles often identify Yiming Zhu as CEO and cite an employee count of more than 5,000. Because those figures do not match the timing of the current company profile, this guide uses the company’s current identification of Mark Cao as President and does not present an outdated employee figure as current.
Headquarters map
CXMT’s main base is in Hefei. The current Chinese-language privacy policy lists the registered address of ChangXin Technology Group Co., Ltd. as No. 799 Qide Road in the Hefei Economic and Technological Development Zone. Older certification documents for ChangXin Memory Technologies also identify No. 388 Xingye Avenue. Registered and operating-site addresses should therefore not be treated as interchangeable.
The map is a broad location reference. Confirm the latest address with CXMT before visiting or sending correspondence.
CXMT vs. YMTC
CXMT and Yangtze Memory Technologies are both Chinese memory manufacturers, but they produce different types of memory. They are better understood as companies serving complementary segments of China’s memory industry than as partners unless a specific relationship is supported by primary evidence.
| Company | Main memory | Use | Positioning |
|---|---|---|---|
| CXMT | DRAM | Temporary working memory for processors | Develops and manufactures DDR and LPDDR |
| YMTC | NAND flash | Non-volatile data storage | Develops and manufactures 3D NAND for SSDs and storage |
CXMT products
The official product catalog lists DDR5, LPDDR5/LPDDR5X, DDR4 and LPDDR4X. DDR5 should no longer be described only as a future project because CXMT now publicly presents a DDR5 product family.
| Product | Officially stated specifications | Applications |
|---|---|---|
| DDR5 and modules | Up to 8,000 Mbps; 16Gb and 24Gb dies | Servers, workstations, desktop and notebook PCs |
| LPDDR5X | 12Gb and 16Gb dies; up to 10,667 Mbps | Flagship smartphones, tablets and mobile devices |
| DDR4 and modules | Multiple DRAM and module products | Servers, PCs, IoT and industrial equipment |
| LPDDR4X | Low-power mobile DRAM | Smartphones, wearables and tablets |
CXMT states that its DDR5 consumes 20% less power than DDR4 in internal testing. It says LPDDR5X is 66% faster and consumes 30% less power than LPDDR5 in internal comparisons. These are company test results rather than independent head-to-head benchmarks against competitors.
From LPDDR5 to LPDDR5X
In November 2023, CXMT announced 12Gb LPDDR5 dies and 6GB and 12GB packaged products. It said the 12GB product had received customer validation from Xiaomi and Transsion. The company announced LPDDR5X mass production in October 2025 and displayed DDR5 and LPDDR5X portfolios at IC China in November 2025.
As of July 2026, HBM is not listed in CXMT’s official product catalog. External reports about HBM development should be distinguished from products whose mass production and sale are confirmed by the company.
History
- 2016: CXMT was founded
- March 2017: construction of Fab A in Hefei began
- January 2018: Fab A1 construction was completed
- July 2018: 8Gb DDR4 taped out
- May 2019: DDR4 testing succeeded
- September 2019: CXMT announced 8Gb DDR4 mass production
- November 2019: first order received and product sales began
- June 2020: Fab C project began
- December 2021: Fab C2 construction began
- January 2022: Fab C1 trial production line in Beijing began operating
- June 2022: Fab A2 construction in Hefei was completed
- November 2023: LPDDR5 portfolio announced
- October 2025: LPDDR5X mass production announced
- November 2025: expanded DDR5 and LPDDR5X portfolios presented
Manufacturing sites
| Location | Official history name | Confirmed milestones |
|---|---|---|
| Hefei, Anhui | Fab A, A1 and A2 | Fab A construction began in 2017, A1 was completed in 2018 and A2 in 2022 |
| Beijing | Fab C, C1 and C2 | Project began in 2020, C2 construction in 2021 and C1 trial production in 2022 |
Older summaries often mention only Hefei factories. The official history also identifies the Beijing Fab C project. Claims that all back-end work is outsourced are not repeated here because they could not be confirmed in current primary company material.
CXMT vs. Samsung, SK hynix and Micron
| Company | Base | Memory focus | Difference from CXMT |
|---|---|---|---|
| CXMT | China | DDR and LPDDR | Focused on Chinese DRAM production; privately held |
| Samsung Electronics | South Korea | DRAM, NAND and HBM | Much broader product range and larger production scale |
| SK hynix | South Korea | DRAM, NAND and HBM | Leading position in AI-oriented HBM |
| Micron Technology | United States | DRAM, NAND and HBM | Large global customer base and public financial disclosure |
Process labels measured in nanometers are difficult to compare directly because manufacturers use different naming conventions. Product availability, speed, density, customer qualification and production scale are generally more useful comparison points.
U.S. restrictions and regulatory risk
CXMT appears on the U.S. Department of Defense list of Chinese military companies published under Section 1260H in January 2025. U.S. government procurement restrictions involving CXMT semiconductors are also being implemented.
The Department of Defense Section 1260H list and the Department of Commerce BIS Entity List are different systems. A Section 1260H designation should not automatically be described as a comprehensive BIS Entity List export ban. Separately, U.S. export controls on advanced DRAM and semiconductor manufacturing equipment can affect equipment access and technology development in China.
Strengths and risks
| Strengths | Risks and questions |
|---|---|
| Expanded from DDR4 into DDR5 and LPDDR5X | Access to advanced manufacturing tools and materials |
| Manufacturing base in Hefei and Beijing | DRAM pricing cycles and capital intensity |
| Close to China’s large PC and smartphone market | Technology and scale gap with Samsung, SK hynix and Micron |
| Integrated design, manufacturing and sales | Limited public financial and capacity disclosure |
Frequently asked questions
What does CXMT do?
CXMT designs, develops, manufactures and sells DRAM for phones, PCs, servers and other devices.
Are CXMT and YMTC the same company?
No. CXMT focuses on DRAM, while YMTC focuses on NAND flash memory.
Does CXMT mass-produce DDR5 and LPDDR5X?
CXMT lists DDR5 in its official product catalog and announced LPDDR5X mass production in October 2025. It states maximum speeds of 8,000 Mbps for DDR5 and 10,667 Mbps for LPDDR5X.
Is CXMT publicly listed?
No. CXMT is privately held, so ordinary investors cannot directly purchase CXMT shares on a public stock exchange.
Is CXMT under U.S. sanctions?
CXMT is on the Defense Department’s Section 1260H list, but that is separate from the BIS Entity List. Government procurement and advanced semiconductor export-control rules should be identified by the specific legal regime rather than grouped under one broad sanctions label.
Summary
CXMT is a privately held Chinese DRAM manufacturer that has progressed from DDR4 into officially presented DDR5 and LPDDR5X portfolios. It differs from YMTC, which makes NAND flash. The major points to watch are customer adoption, production scale in Hefei and Beijing, access to advanced equipment, any official HBM product launch and the limits of financial and capacity disclosure.
