John O wrote:
running normally, but idle: 145W to 160W, but usually
150W
all hard disks spun down, display blanked: 124W
Stand By mode: 60W
Hibernate mode: 2-3W
totally "off": 2-3W

Hibernate = totally off.

after I flip power supply's rocker switch to "0": 0W

Now that's what I call *totally off*

That's a cool set of measurements, and tells us a lot. The
only
factor that isn't accounted for here is the monitor power.

-John O