But a 650W PSU compared to the given power from this box or hardware is nonsense in
my eyes, I drive also a Intel Xeon E3-1285v3 and be happy with a 200W PSU, but compared
to the delivered power from this box, the one from the @kicker892 is far far away from.
Sorry, I have no idea what point you're trying to make here.
You could put a 1200W PSU on your system that needs 200W, it still only draws 200W.
You just have LOTS of unused power capacity available for future expansion (1000W worth).