ChangXin Memory Technologies (CXMT) says it has begun mass production of LPDDR6 memory, with the Xiaomi 18 Fold set to be the first device to use it. According to Tom's Hardware and HotHardware, this puts the China-based DRAM maker ahead of Samsung, SK hynix, and Micron on the industry's newest mobile memory standard, though it's so far validated for only one phone.
CXMT posted on its Weibo account that it has started mass production of LPDDR6 memory, with Xiaomi's upcoming 18 Fold smartphone set to be the first device to ship with it in September, according to HotHardware and Tom's Hardware. That timing is notable: CXMT, a relatively young player in the DRAM market, has effectively beaten Samsung, SK hynix, and Micron — the industry's three long-standing DRAM leaders — to the announcement of mass-produced LPDDR6.
LPDDR6 is a significant architectural shift from LPDDR5/LPDDR5X. It moves from NRZ to PAM3 signaling, which packs 3 bits of data across two symbols, and narrows the per-channel I/O bus from 32 bits down to 24 bits, requiring changes at both the hardware and software level. The standard is specified for transfer rates up to 43.2 GT/s, though the first real-world implementation in the Xiaomi 18 Fold runs at 10,667 Mbps — the same peak rate as the fastest LPDDR5X — while using a wider 4x24-bit (96-bit total) bus to reach roughly 113.8 GB/s of peak bandwidth, according to HotHardware's calculations.
Tom's Hardware is careful to note the caveats: this is one smartphone maker validating one model, not proof that CXMT has reached full technological or manufacturing parity with its larger rivals across the board. Still, the fact that CXMT is entering the market at the start of a new standard's commercialization — rather than years behind, as with previous DRAM generations — marks a real narrowing of the gap between China's leading DRAM producer and the established industry players.
For PC builders, this announcement doesn't have immediate implications. LPDDR6 is a mobile memory standard and won't appear in desktop products; the desktop equivalent, DDR6, is still not finalized by JEDEC. HotHardware also points out that AMD has committed to supporting AM5 (DDR5) through 2029, and Intel's upcoming Nova Lake platform is also expected to stick with DDR5, meaning desktop DDR5 remains the standard for the foreseeable future.
What We Know
| Spec | Detail |
|---|---|
| Signaling | PAM3 (encodes 3 bits across two symbols), replacing the NRZ signaling used by LPDDR5/LPDDR5X |
| LPDDR6 standard transfer rate | Up to 43.2 GT/s |
| First implementation speed (Xiaomi 18 Fold) | 10,667 Mbps (10.67 Gbps) — matching the fastest LPDDR5X |
| I/O bus width | Reduced to 24-bit per channel; Xiaomi's config uses 4x24-bit for a 96-bit total bus |
| Peak theoretical bandwidth (Xiaomi config) | ~113.8 GB/s |
| First device | Xiaomi 18 Fold, launching in September |
| Future scaling | LPDDR6 expected to scale to 14.4 Gbps and beyond |
| Paired SoC | Xiaomi XRING O3, said to offer 48% more memory bandwidth than the XRING O1 |
Frequently Asked Questions
What is CXMT and what did it announce?
CXMT (ChangXin Memory Technologies) is a China-based DRAM maker that announced on Weibo it has started mass production of LPDDR6 memory, ahead of Samsung, SK hynix, and Micron, according to Tom's Hardware and HotHardware.
What device will use the first LPDDR6 memory?
The Xiaomi 18 Fold, launching in September, will be the first device to ship with CXMT's LPDDR6 memory.
How is LPDDR6 different from LPDDR5X?
LPDDR6 uses PAM3 signaling instead of NRZ, encoding 3 bits across two symbols, and reduces the per-channel I/O bus from 32 bits to 24 bits. The standard supports transfer rates up to 43.2 GT/s, though the first implementation runs at 10.67 Gbps, matching top LPDDR5X speeds, while relying on a wider bus for higher bandwidth.
Does this affect desktop DDR5 or DDR6 memory?
No. LPDDR6 is a mobile memory standard. The desktop DDR6 spec has not yet been finalized by JEDEC, and both AMD's AM5 platform and Intel's upcoming Nova Lake platform are expected to continue using DDR5 for the near term.
