Generated clocks in dcm1.v are declared with lower frequency, for a better PAR:

             /* synthesis FREQUENCY_PIN_CLKOS3="75.000000" */ instead of 90
             /* synthesis FREQUENCY_PIN_CLKOS2="11.250000" */
             /* synthesis FREQUENCY_PIN_CLKOS="30.000000" */
             /* synthesis FREQUENCY_PIN_CLKOP="60.000000" */ instead of 75
             /* synthesis FREQUENCY_PIN_CLKI="25.000000" */
