About 10W, as I was looking for a power efficient CPU when I bought the server. So 7kWh a month, a little bit over 2€/month.

I have been using a j5005 with 16GB Ram, 40TB attached storage (the harddrives are spun down when not in use) for the last five years and so far I never had the impression that I need to upgrade.

The Gemini lake series supports only 8GB Ram officially, but apparently up to 32GB are possible.

Looks very promising! Thanks :)