You could always turn down settings in video games, so that your GPU does less calculations and therefore uses less power. In my experience, all modern cards i

You could always turn down settings in video games, so that your GPU does less calculations and therefore uses less power. In my experience, all modern cards idle at very low power usage (less than 10W), and scales up: using more and more electricity the more difficult the video games you throw at them. One of the better settings to come by (especially for laptops) is FPS limiters.