@Martin.v.r
First let me say, that I am impressed about Your RAM settings!

I just have one doubt, because I donīt know if I understood this right.
Is it correct, that the QPI Link should be 2 times the speed of the RAM?
As I understand it, You are running QPI 3367,5 with a BCLK 210,5 (3367,5 div 210,5 = 16) what tells me, that You use the slower QPI.
The other Option in the Bios is 210 * 18 = QPI 3780 Mhz. This was good for a Memory speed of 1890 Mhz.

Here now my doubt:
- Does a Memory speed higher than the QPI speed (like in Your case) bring any better performance?
- Was it not better if You would set the higher QPI Speed?