Achim: if you chose load optimized settings the BE does not boot at 11x but 11.5x (unless it was a faulty chip!). Your SG readings were exactly as in that link, meaning way too high over whats possible so it looks exactly like the above. Installing SG is going to cause collisions with other software since it's too old and unupdated so better not use it and save the headache of waging through false readings.

Also, it's not just SG, it's the behavior of every other software monitor which can change if you start SG before them. So if you want to use it, start SG after them for more accurate results.

Also can you post batch etc (more info) about your BE?
i.e. what's your idle temps and case ambients? what's the degree of accuracy on your probe? what was idle/load power at stock? have you primed stock for 8hours yet to see if it were stable? primed 2600? have you moved NB multi up yet?