In an embodiment, processor includes at least one logic circuit to generate information to be output from the processor; an input/output (IO) interface circuit coupled to the at least one logic circuit to receive and transmit the information; a voltage regulator to provide an operating voltage to the IO interface circuit; and a controller to control the voltage regulator to provide the operating voltage at an adjusted level from a nominal operating voltage based on a process variation of at least a portion of a die including the IO interface circuit. Other embodiments are described and claimed.