[rutger]

Not too interested in following the color coding convention on the wiring I see... 

I really tried but failed. The crimp connectors only came in red, blue, yellow and black and weird sizes. Cables from the molex connector were yellow etc. and reverse with the red/black of sense+/sense-.

With the case back on later nobody will know   but I did check every power pin individually (and will do so again tomorrow).

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Only caveat is that I'm not measuring 12V but 10.8V without load and it drops to 10V with a very small load (fan). Adjusting does not do a lot. Same for the -12V, it sits at -9.98V or so. 5V is at 5.2V.

That is consistent with a group regulated supply that derives its feedback from +5 V

Thx, that explains. I'll try to connect a load on 5V to see if that improves the readings!