If the majority of ram isn’t being utilized you either have a problem or have entirely to much ram. I’m not saying programs can’t be memory hogs, but they should utilize what resources are there to perform better. It would be like turning on a flash light, using all of the power and then covering half the bulb while trying to cross a field in the dark. The CPU and GPU use more electricity when running at higher percentages, ram is negligible for the most part.