I hope my experience will help some others. Especially if you plan to buy a embed CPU motherboard with intel celeron etc...   My objective was to build a silent and low watt usage HTPC for home usage. In europe (I am in France), 1W / year cost 1€ / year. So if I build a  configuration at 250W, the cost is 250€ per year. Which is amazing just for plex !! netflix + amazon prime are cheapest per year   My usage is at 90% for plex/emby & seedbox, and 10% nextcloud and V