CXL 3.0 Specification Released - Doubles The Data Rate Of CXL 2.0

Written by Michael Larabel in Standards on 2 August 2022 at 09:30 AM EDT. 4 Comments
The CXL Consortium today announced the Compute Express Link 3.0 specification that doubles the data rate of CXL 2.0 to 64 GT/s while introducing no added latency.

While still waiting for more CXL 2.0 enabled servers and for the software support to get squared away within the Linux kernel for its CXL subsystem, CXL 3.0 will be the next iteration of Compute Express Link to look forward to in the future. In addition to doubling the data rate of CXL 2.0, CXL 3.0 introduces fabric capabilities and management, improved memory sharing and pooling, enhanced coherency, and peer-to-peer communication.

- Fabric capabilities
      Multi-headed and Fabric Attached Devices
      Enhanced Fabric Management
      Composable disaggregated infrastructure
- Better scalability and improved resource utilization
      Enhanced memory pooling
      Multi-level switching
      New enhanced coherency capabilities
      Improved software capabilities
- Doubles the bandwidth to 64GTs
- Zero added latency over CXL 2.0
- Full backward compatibility with CXL 2.0, CXL 1.1, and CXL 1.0

CXL 3.0 retains backward compatibility with CXL 2.0/1.1/1.0. The specification can be found at

More details on the CXL 3.0 specification via today's press release.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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