Recommended VCCR_GXB and VCCT_GXB settings for Arria V GX C4, C5, C6 and I5 designs that run transceivers at less than or equal to 3.125 Gbps - Recommended VCCR_GXB and VCCT_GXB settings for Arria V GX C4, C5, C6 and I5 designs that run transceivers at less than or equal to 3.125 Gbps Description If your design targets an Arria V GX C4, C5, C6 or I5 device and implements a data rate less than or equal to 3.125 Gbps, Altera recommends setting V CCR_GXB and V CCT_GXB to 1.1V to reduce power consumption. The Quartus II software sets the default VCCR_GXB and VCCT_GXB settings to 1.15V . You may change the VCCR_GXB and VCCT_GXB settings to 1.1V manually. Resolution Add the following assignment to your Quartus II Settings File ( .qsf ): s et_instance_assignment -name XCVR_VCCR_VCCT_VOLTAGE 1_1V -to * Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 11.1 ['Arria® V FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']