I’ll just come out and say it: 50W. I know, I know an order of magnitude above what’s actually needed to host websites, media center and image gallery.
But it is a computer I had on-hand and which would be turned on a quarter of the day anyway. And these 50W also warm my home, although this is less efficient than the heat pump, of course.
What’s your usage? What do you host?
My main issue is I’m not shutting down my Pi-Hole, home assistant, NAS etc etc just to plug in something like this in, and then 24h or so later shut them all down again to retrieve it again. That said I basically have a collection of Pis (passively cooled and this silent) and a Synology disk station so the power use is pretty low.