The new standard, called OpenCAPI provides an open, high-speed pathway for different types of technology – advanced memory, accelerators, networking and storage – to more tightly integrate their functions within servers. This data-centric approach to server design, which puts the compute power closer to the data, removes inefficiencies in traditional system architectures to help eliminate system bottlenecks and significantly improve server performance.

These specifications were contributed to the OpenCAPI Consortium pursuant of the IPR Policy as input specifications and will be reviewed and updated appropriately following the work group process.  

The OpenCAPI consortium looks forward to publishing draft specifications when this process completes.

OpenCAPI 3.0 Transaction Layer Specification (updated*)

OpenCAPI 3.1 Transaction Layer Specification (updated*)

*The changes in the V3.0 specification can be found in the revision log.  A new section on profiles has been added with some new terms and clarifications added.  The V3.1 specification is a revision of the V3.0 specification (includes all the V3.0 changes) and adds new content.  The revision log shows the changes.  In both specifications, changes from the October drop have change bars noted.

OpenCAPI 3.0 Data Link Layer Specification**

**Updates to this DL specification includes a reserved bit change in the DL content to short flit next indication, cleaned up test and numbering for consistency and added a version table.

 

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