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Introducing CXL 4.0: Significant Improvements in Bandwidth, Connectivity, Memory Maintenance, and Security

Introducing CXL 4.0: Significant Improvements in Bandwidth, Connectivity, Memory Maintenance, and Security

18 Nov 2025 CXL Consortium Tony Benavides and Mahesh Wagh, CXL Consortium Technical Task Force Co-Chairs
The CXL 4.0 specification doubles bandwidth from 64GTs to 128GTs, adds support for bundled ports, and enhances memory RAS features. The white paper details the new features in the specification. 
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