Intel tries to hide things sometimes I think

Ya, I do think QPI/Vtt voltage adds to temps, how much I am not sure though.

You could go back down to a low overclock or stock and see though. Just go to stock speed but set Vcore to 1.35, then see temps. Then do the same, but set QPI/Vtt to 1.35 and see temps. I would imagine QPI/Vtt does not add near as much of course, but the amount it adds may or may not be significant

Is that your max Blck, even with x19 no turbo so x19 stays at x19? Just wondering, looks good though! I have only pushed mine to 4.2 (21x200) just have not had time to play with it yet