CXL Consortium releases Compute Express Link 4.0 specification

The CXL Consortium, an industry standard organization that develops and promotes an open coherent interconnection for heterogeneous memory and computing solutions, announced the release of the Compute Express Link 4.0 specification. The specification is presented as a response to increasing demands from emerging workloads placed on todayu2019s data centers, positioning the standard as a foundation for improved memory and device connectivity in heterogeneous architectures.

Derek Rohde, CXL Consortium president and treasurer and principal engineer at NVIDIA, characterized the release as a milestone for advancing coherent memory connectivity. According to the announcement, the CXL 4.0 specification doubles the bandwidth over the previous generation and introduces powerful new features. The consortium framed the update as the result of member companiesu2019 collaboration to produce open standards that enable broader compliance and interoperability across implementations.

The consortium emphasized that the specification is intended to empower data center innovation and help the industry scale for future usage models. By promoting an open, coherent interconnect, the CXL 4.0 release aims to support heterogeneous memory and computing solutions while providing a common framework for compliance and interoperability. The announcement highlights the consortiumu2019s role in coordinating industry efforts to meet evolving workload requirements without detailing specific technical changes beyond the reported bandwidth increase and new feature set.