I could just revert back in the Bios directly.
I still get BSOD in Blend, but it seems that it takes less restarts to get into the right bootsequence. But I have yet to boot more often to say anything exactly about that.
Would there be any benefit to go to an even lower Bios Version?
What I have forgotten previously, I did now.
When I am running the CPU @3.46, which is the maximum without the need for more Volt, Blend runs easily for four hours.
Why would it possible with a lower clock and Voltage? I thought about the temperature, but under Blend and with 3.7GHz it becomes not much warmer either (unlike the other three options).
So, is it possible that some Controller does not like higher Voltages over a long time? Then again, the other three options run without problems at higher Volt.