GUANGDONG HENGQIN, China, September 02, 2025 –Montage Technology today announced the launch of its CXL® 3.1 Memory eXpander Controller (MXC, Part No. M88MX6852), now in sampling phase with key customers. Compliant with the CXL 3.1 Type 3 specification, the controller supports both CXL.mem and CXL.io protocols, delivering high-bandwidth, low-latency memory expansion and pooling solutions for next-generation data center servers.
Built on a PCIe® 6.2 physical layer interface, the CXL 3.1 MXC achieves data transfer rates of up to 64 GT/s (x8) and offers versatile configurations with multi-rate and multi-width support, including the option to split into two x4 ports. The chip integrates a dual-channel DDR5 memory controller operating at speeds of up to 8000 MT/s, substantially enhancing data exchange efficiency between the host CPU and backend SDRAM or DIMM modules.
To support intelligent system management, the controller incorporates dual RISC-V microprocessors serving as an Application Processing Unit (APU) and a Security Processing Unit (SPU), enabling dynamic configuration of DDR/CXL resources, real-time system event handling, and hardware-level security management. The device also provides various interfaces, including SMBus/I3C, SPI, and JTAG, for seamless system integration and simplified firmware updates.
As the demand for cloud resource pooling increases rapidly, traditional memory architectures face growing bandwidth and scalability bottlenecks. By leveraging CXL memory pooling, the controller facilitates dynamic and elastic memory allocation across data centers, helping customers to reduce total cost of ownership (TCO).
Housed in a compact 25 mm x 25 mm package, the chip supports both EDSFF (E3.S) and PCIe add-in card (AIC) form factors, making it ideal for deployment in servers, all-flash arrays, and edge computing platforms.
“The launch of the CXL 3.1 MXC marks another major step forward in our continued leadership in CXL innovation,” said Stephen Tai, President at Montage Technology. “This chip not only improves the memory expansion performance and energy efficiency, but also accelerates the industry’s adoption of disaggregated memory architectures through standards-based solutions, laying a solid foundation for memory pooling and sharing in next-generation computing infrastructure.”
Currently sampling with customers, the controller is available with a complete Reference Design Kit (RDK), helping customers streamline evaluation and development of CXL-enabled memory expansion systems.