Added support for 600 W, -48 N PCB geometry
• Updated Figure 3-1
• Added Section 6.3.6
• Added Chapter 10, PCI Express 48VHPWR Auxiliary Power Connector Definition
• Added Chapter 9, PCI Express 12V-2x6 Auxiliary Power Connector Definition
• Replaced Sections 11.3 and 11.4.2
• Incorporated Manufacturer Test Mode Pin ECN
• Added Section B.3, 32 GT/s Test Channels
• Incorporated C
in
Maximum Increase ECN.
• Replaced Figure 3-1, Figure 6-5, Figure 11 40, Figure 11-43, Figure 11 43, and
Figure 11 44.
• Updated Table 5-3, Table 5-4, Table 5-7, and Table 5-8
• Added Table 5-9
• Removed reference to the PCI Express Mini Card Electromechanical Specification for
CLKREQ# signal details.
• Added Section 2.9 CLKREQ# Signal (Optional)
• Updated Table 2-9
• Updated Liquid Cooling Enablement section
• Updated Figure 9-1 through Figure 9-8
• Update Figure 6-10 and Figure 6-11
• Created Appendix D, Thermal Management
• Moved Chapter 12 into Appendix D
• Updated Appendix E, Acknowledgements
• Misc update
Incorporated following ECNs:
• Power Excursion Limits for 300-600 W PCIE AICs
• CEM_12VHPWR Sideband Allocation and Requirements
• Transmitter_Jitter_Requirements
• Expanding Power Excursion Spec to All Power Levels of PCIe AICs and to CEM
Connector Power Rails
• 12VHPWR Cable Plug Update
• CEM_ECN_Update_to_Transmitter_Jitter_RequirementsECN_Feb10_2023
12V Aux Power Header and Cable Assembly Improvements:
― Increased maximum Add-in Card total power to 675 W
― Moved previous Chapter 9 to new Appendix E, PCI Express 12VHWPR Auxiliary
Power Connector Definition
― Added new Chapter 9, PCI Express 12V-2x6 Auxiliary Power Connector Definitions
• Incorporated edits based on errata dated March 30, 2023.
• Added support for 64.0 GT/s.
• Corrected Figure 6-4; removed additional text box.
• Updated Section 6.3.7, Signal Integrity Requirements and Test Procedures for 64.0 GT/s
Support.
• Updated Table 6-9.
