CXL 3.2 memory expander controller chip enters trial production at Montage Technology

Montage Technology has started trial production of a CXL 3.2 Memory eXpander Controller (MXC) chip aimed at CXL Type 3 memory expansion for AI, cloud, and data center platforms. The CXL 3.2 MXC is built to support higher-capacity memory behind a CXL link, with an eye toward memory pooling and tiered-memory designs.

The MXC complies with CXL Type 3 specifications and supports both CXL.mem and CXL.io. It’s designed with PCIe 6.x and CXL 3.2 protocol support, with stated transfer rates up to 64 GT/s. On the memory side, the chip integrates dual DDR5 memory controllers supporting up to 8000 MT/s DDR5, translating host-side CXL memory requests into DDR commands in real time to access backend DDR5.

Integration is a big part of the pitch here. Montage says the chip includes PCIe 6.x PHY, DDR5 PHY, dual RISC-V processor subsystems, and a set of management interfaces. It also supports multiple CXL memory expansion form factors, including PCIe add-in cards (AIC) and EDSFF modules.

For operators and system architects, the practical question is whether the ecosystem is ready to move beyond “CXL on paper” to repeatable, validated memory expansion products. A controller that targets PCIe 6.x and CXL 3.2, while also supporting AIC and EDSFF implementations, is clearly intended to land in the part of the stack where platform interoperability and qualification cycles matter as much as raw bandwidth.

Stephen Tai, president at Montage Technology, called the trial production “an important milestone” for “CXL innovation and commercialization,” adding, “As memory demands continue to surge in the AI era, we are providing our customers with high-bandwidth, large-capacity, and highly reliable memory expansion solutions, accelerating the large-scale adoption of CXL in data center and AI infrastructure.”

Alongside the silicon, Montage says it provides a software development kit (SDK) plus analysis and testing tools intended to help customers with product development, compatibility validation, and mass production. Montage says the CXL 3.2 MXC has been integrated into next-generation CXL products by memory module manufacturers including Samsung and SK hynix, with initial validation completed, and is designed to align with server platforms including Intel Xeon and AMD EPYC.

Montage Technology also included statements from Samsung, SK hynix, Intel, and AMD describing CXL’s role in increasing memory capacity, improving resource utilization, and enabling more flexible memory architectures for AI and data center workloads.