Energy use desktop computer. To use more energy Notebook because, if used, computer desk to plug in charger constantly to activate it. Make to power all the time, but Notebook save energy than a desktop computer. Because if the charger battery full for you, take it off, is still in use. Don't waste the rail line charging time as desktop computer and Notebook was designed to use portable essentially have the Yang energy. So Notebook, thus saving more energy than a desktop computer.