Montage Technology, an integrated circuit company, has recently introduced its CXL 3.1 Memory eXpander Controller (MXC) to the market. The controller is currently undergoing testing by key customers such as AMD and Intel. It is designed to comply with the CXL 3.1 Type 3 specification, supporting CXL.mem and CXL.io protocols. Montage Technology claims that the controller offers low-latency memory expansion, high-bandwidth performance, and polling capabilities that are ideal for next-generation data center servers.
The CXL 3.1 MXC is based on a PCIe 6.2 physical layer interface and can achieve data transfer rates of 64 GT/s (x8). It features a flexible configuration with multi-width and multi-rate support, allowing it to be split via two x4 ports. The compact size of 25 mm x 25 mm makes it suitable for EDSFF (E3.S) and PCIe add-in card (AIC) form factors commonly found in high-performance computing environments. The chip includes a dual-channel DDR5 memory controller capable of operating at speeds of up to 8000 MT/s.
In addition to its impressive technical specifications, the controller is equipped with dual RISC-V microprocessors serving as an Application Processing Unit (APU) and Security Processing Unit (SPU) for system management. The system can dynamically adjust DDR and CXL memory resources, manage security in-hardware, and respond to system events in real-time.
The CXL 3.1 MXC also offers multiple communication interfaces, including SMBus/I3C for sensor and control data, SPI for high-speed communication with other chips, and JTAG for hardware testing and debugging. The chip supports firmware updates without complex processes.
Industry leaders such as AMD and Intel have praised the CXL Memory expansion technology, emphasizing its importance in enabling heterogeneous memory architectures and scalable memory solutions. Montage Technology aims to address scalability and bandwidth bottlenecks in standard memory architectures by offering CXL memory pooling solutions to help customers utilize memory more effectively.
Stephen Tai, President of Montage Technology, highlighted that the CXL 3.1 MXC accelerates the adoption of disaggregated memory architectures through standards-based solutions, serving as a foundation for memory pooling and sharing in next-generation computing infrastructure.
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