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China's CXMT Claims First LPDDR6 Mass Production, Set for Xiaomi's 18 Fold Smartphone
Chinese memory chipmaker CXMT has announced mass production of its next-generation LPDDR6 memory, beating rivals Samsung and SK hynix to the milestone. The technology will debut in Xiaomi's upcoming 18 Fold smartphone, which will also feature the company's own Xring O3 processor.
By Tertius News AI Desk2 distinct · 3 mastheads · 3 articlesVersion 1Coverage Published
CXMT Announces LPDDR6 Mass Production
Chinese memory chipmaker CXMT (ChangXin Memory Technologies) has announced mass production of its next-generation LPDDR6 memory, with the technology set to debut in Xiaomi's upcoming 18 Fold smartphone in September. The announcement puts CXMT ahead of South Korea's Samsung Electronics and SK hynix in publicly confirming both mass production and commercial smartphone deployment of LPDDR6 memory.
Xiaomi Partnership
CXMT said on Saturday that its LPDDR6 memory had "officially entered mass production" and would be used in Xiaomi's 18 Fold. Xiaomi founder and CEO Lei Jun separately confirmed that the company's new Xring O3 processor would support CXMT's LPDDR6, making the foldable phone the first handset to use the combination.
LPDDR6 is a newer generation of low-power memory designed for mobile devices. It helps smartphones handle data more efficiently and supports the growing computing requirements of advanced processors and applications. The development also highlights Xiaomi's efforts to reduce its dependence on overseas chip suppliers. The company has traditionally relied on Qualcomm and MediaTek for application processors, but is increasingly using its own processors while expanding cooperation with Chinese chip suppliers.
A local semiconductor industry official said the Xiaomi-CXMT partnership could give CXMT an early opportunity to test its LPDDR6 technology in a flagship smartphone.
"Xiaomi is effectively serving as an early test bed for CXMT by putting its own processor together with LPDDR6 in a flagship device," the official said.
Technical Details and Competition
Reports indicate the LPDDR6 interface has a memory transfer rate of 10,667 Mbps, and with a 4× 24-bit bus width (96-bit total), that gives a peak theoretical memory bandwidth of around 128 GBytes/second. However, because 32 bits of the 288-bit interface are dedicated to metadata, the actual peak theoretical bandwidth is closer to 113.8 GBytes/second. Xiaomi says the XRING O3 SoC offers 48% more memory bandwidth than the XRING O1.
The official cautioned that CXMT's mass-production announcement does not necessarily mean that it has technologically overtaken Samsung or SK hynix. Indeed, both rivals are also developing LPDDR6 memory. SK hynix said in March that it had completed development of a 16-gigabit LPDDR6 product and planned to begin supplying customers in the second half of the year. Korean media reported that Xiaomi was likely to be among SK hynix's first customers when it begins shipping.
Outlook
The 18 Fold's expected shipments of around 200,000 to 300,000 units are small, meaning CXMT's actual production capacity and yields could be lower than the mass-production announcement suggests. The technology is also expected to scale to 14.4 Gbps in the future. JEDEC's DDR6 specification has not yet been finalized. These factors, combined with the current shipments acting as an early test, suggest this is the start of a long road for CXMT's LPDDR6 technology rollout.
How each outlet told it
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Chinese memory chipmaker CXMT (ChangXin Memory Technologies) has announced mass production of its next-generation LPDDR6 memory.
The technology is set to debut in Xiaomi's upcoming 18 Fold smartphone in September.
CXMT said on Saturday that its LPDDR6 memory had 'officially entered mass production'.
Xiaomi founder and CEO Lei Jun confirmed that the company's new Xring O3 processor would support CXMT's LPDDR6.
A local semiconductor industry official said the Xiaomi-CXMT partnership could give CXMT an early opportunity to test its LPDDR6 technology.
The official cautioned that CXMT's mass-production announcement does not necessarily mean that it has technologically overtaken Samsung or SK hynix.
The Korea Herald shared Xiaomi is targeting shipments of around 200,000 to 300,000 units for the 18 Fold.
SK hynix said in March that it had completed development of a 16-gigabit LPDDR6 product and planned to begin supplying customers in the second half of the year.
Korean media reported in July that Xiaomi was likely to be among SK hynix's first customers.
Samsung unveiled its LPDDR6 technology before CES 2026 and said it had been working with major system-on-chip makers on early validation.
AI-extracted; can misattribute a claim — see Methodology.
Each row is one claim, attributed to the outlet whose wording states it most clearly. Confidence rates how directly the source text states the claim — explicit and unhedged rates high; hedged, pieced-together, or internally inconsistent statements rate lower. It does not measure whether the claim is true. Status is Contested when two claims on this page negate each other; otherwise it counts the distinct outlets we found asserting that specific claim — so a single-source claim can still show high confidence, and a multi-source claim can show medium. Every one of those outlets is named beside the status, so you can check the count against the list. For claims extracted before we began storing that list, the row says so: it names the outlet the claim is quoted from and states that we have not recorded which outlets backed it. Outlets wrote at different times, so a figure that evolves — a casualty count, for example — can legitimately differ between rows; check the "as of" time next to each claim's source.
Claim
Confidence
Status
ClaimChinese memory chipmaker CXMT (ChangXin Memory Technologies) has announced mass production of its LPDDR6 memory.
ClaimCXMT's announcement puts it ahead of Samsung Electronics and SK hynix in publicly confirming both mass production and commercial smartphone deployment of LPDDR6 memory.
ClaimA local semiconductor industry official said the Xiaomi-CXMT partnership could give CXMT an early opportunity to test its LPDDR6 technology in a flagship smartphone.
ClaimThe official said: 'Xiaomi is effectively serving as an early test bed for CXMT by putting its own processor together with LPDDR6 in a flagship device.'
ClaimThe small expected volume for the 18 Fold means CXMT's actual production capacity and yields could be lower than the mass-production announcement suggests.