Irrespective of whether you use the significantly less specific or more precise process, you will have a wattage benefit. For our calculation examples, we're going to use 400w as our benefit. The EC650LCD is sufficiently small to cover absent, taking on little or no desktop area for a 390W device. https://trevor4678a.blogoscience.com/40359547/the-fact-about-power-supply-battery-backup-12v-that-no-one-is-suggesting