This presentation provides updates on the PCI Express CEM specification development work in the PCI-SIG Electromechanical Workgroup. The presentation focuses on providing an overview of the changes introduced in PCI Express Card Electromechanical Specification, Rev 5.0 (CEM 5.0) and related ECRs. The presentation also provides an overview of several potential improvements under investigation for CEM 6.0. This includes Add-in Card outline updates, sideband interfaces and connector optimizations.