A technique for determining thermal design point (TDP) power efficiency for an integrated circuit is disclosed. A simulation executes a set of input vectors on a model of an integrated circuit to generate a first estimated power consumption data during a first number of clock cycles. A simulation executes the set of input vectors on a model of an integrated circuit to generate a second estimated power consumption data during a second number of clock cycles. TDP power efficiency for the integrated circuit is calculated based on the first estimated power consumption data and the second estimated power consumption data.