Those volts (NB and VTT) are damn high for 3.2Ghz. I need that for 3.8Ghz...!

First, NOTHING should be on auto really, set the memory voltage manually. Is 1.85v what it needs for stock speeds?

I assume you are at 400x8 so the memory is at stock speeds yes?

However, 9 hours is "Prime stable" to most. I would now add some volts to the GTLref for that core and see if it craps out at 9 hours again. Those volts will not put you in a danger zone but you shouldnt need what you have listed for the speeds you have now.