A system includes one or more processor cores, and a voltage regulator that provides an operating voltage to the one or more processor cores in response to receiving a voltage identifier signal that is indicative of the operating voltage. The system also includes a power management unit that may provide a first voltage identifier signal corresponding to a first operating voltage in response to determining that the processor cores are operating in a first operating state in which the one or more processor cores may draw up to a maximum load current. The power management unit may also provide a second voltage identifier signal corresponding to a second operating voltage, which is less than the first operating voltage, in response to determining that the processor cores are operating in a second operating state in which the processor cores are incapable of an increase in load current above a predetermined amount.