In this section, we use our general framework to design a self-optimizing memory controller that will strive to optimize for energy-delay-squared (Et 2 )’“a metric that combines performance and energy consumption. Our evaluation provides quantitative evidence that the resulting controller is significantly superior to a power-aware extension of FR-FCFS that includes Hur and Lin’s Queue-Aware Power-Down mechanism [15], which we refer to as Pwr-FRFCFS.10