My server is usually between 30w-40w (that’s about 20-25p per day electricity cost in the UK).

That’s with the aforementioned processor/ram,a Gigabyte A520M motherboard, 1 case fan, the stocker cooler, a 120gb 2.5" SSD, 2 4TB 3.5" HDDs and 1 8TB 3.5" HDD (all drives always spinning).

It’s running OpenMediaVault as OS and 5 docker containers 24/7 (Flatnotes, FreshRSS, Kavita, qBittorrent and RecipeSage). Other than that I use it for media access from a MiniPC running Debian w/ Kodi accessing it via SMB (the server doesn’t transcode).