Review Zone

PCI Express Specifications and ECRs for Review
PCI-SIG members can influence PCI technology development by submitting engineering change requests (ECRs) as well as reviewing and commenting on draft specifications, ECRs and engineering change notices (ECNs). Members should check the Review Zone regularly for new postings.

Specifications and ECRs currently under review are listed below. PLEASE NOTE: THESE ARE DRAFT SPECIFICATIONS ONLY AND, AS SUCH, ARE SUBJECT TO FURTHER REVISION AND REVIEW WITHOUT NOTICE. THESE DRAFT SPECIFICATIONS ARE PROVIDED TO YOU FOR REVIEW PURPOSES ONLY AND SHOULD NOT BE RELIED UPON FOR DESIGN OR MANUFACTURING PURPOSES. For a list of documents with completed review cycles, visit the PCI Express Review Archive

Additional information on the ECR/ECN process can be found in the Procedures Center.

Documents for Review
Please submit review feedback on all documents below to administration@pcisig.com by the designated review period deadline. All documents for review can be accessed HERE.

12VHPWR Cable Plug Update ECR
 *Please note, this ECR is an ECR to address a system-side shroud design. This is unrelated to high power connections.

  • Review period closes on Tuesday, December 13, 2022.

Alternate Protocol DLLP Reservation ECN

  • Review period closes on Tuesday, December 13, 2022.

PCI Express M.2 Specification Revision 5.0, Version 0.7

  • Review period closes on Saturday, December 17, 2022.

Unordered IO (UIO) ECR

  • Review period closes on Tuesday, January 3, 2023.

Update to Transmitter Jitter requirements at 32.0 GT/s ECN

  • Review period closes on Monday, February 6, 2023.

ACCESS ALL DOCUMENTS FOR REVIEW HERE