Error(14566): The Fitter cannot place x periphery component(s) due to conflicts with existing constraints (x IOPLL(s)). - Error(14566): The Fitter cannot place x periphery component(s) due to conflicts with existing constraints (x IOPLL(s)). Description Due to the Triple-Speed Ethernet Intel® FPGA IP restriction with the option "LVDS" as "Transceiver type," IOPLLs can't be merged. You may see this error in the Intel® Quartus® Prime software when you initiate multiple Triple-Speed Ethernet Intel® FPGA IP with option "LVDS" as "Transceiver type" in a single I/O bank for the Intel® Arria® 10, Intel® Cyclone® 10 GX or Intel® Stratix® 10 L-Tile/H-Tile device. Resolution To avoid this error, follow the steps below: Generate the Triple-Speed Ethernet Intel® FPGA IP with the option "None" as "Transceiver type." Generate the LVDS SERDES Intel® FPGA IP with multiple channels. Connect two IPs manually. Custom Fields values: ['novalue'] Troubleshooting 1508356366 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 17.1 ['Arria® 10 FPGAs and SoCs', 'Cyclone® 10 GX FPGA', 'Stratix® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']