Due to a problem in the Intel® FPGA P-Tile Avalon® Memory-mapped IP for PCI Express* for the Intel® Quartus® Prime Pro Edition software version 20.2, the GUI will show incorrect data bus width and clock frequency.
The Intel® FPGA P-Tile Avalon® Memory-mapped IP for PCI Express* User Guide, Table PHY Clock and Application Clock Frequencies, lists the correct values of data widths and application clock frequency (p_app_clk) for the Intel® FPGA P-Tile Avalon® Memory-mapped IP for PCI Express*.
https://www.intel.com/content/www/us/en/programmable/documentation/aib1557867923977.html#rsc1567029023459
This problem is scheduled to be fixed in a future release of the Intel® Quartus® Prime Pro Edition software.