Is it normal for the MacPro 2013 power light to stay solid when it is asleep and the fans to stay on, although at a low RPM? Things weren't like this with with my 2009 MacPro tower. I am genuinely trying to figure out if this is a "feature" or a flaw I have with my unit. AppleCare so far has not been helpful. All options have been unselected/unchecked in Energy Saver.