not at all: higher performance equals higher freq, which requires higher voltage. Power scales w/ frequency linearly and the with the voltage squared. Then any

not at all: higher performance equals higher freq, which requires higher voltage. Power scales w/ frequency linearly and the with the voltage squared. Then any active cooling will have its own power consumption. Best battery/power savings are achieved running as low as possible voltage for as high as possible frequency. At such voltages the CPUs/APUs are less likely to throttle to begin with.