Thanks a million to Rochel for the hint updating fw of the ssd.
Did not even know that can be updated.
I updated all driver on windows and motherboard, but had big trouble with stutters sinde about october. Did not know why.
Today I checked my ssd´s. Windows ssd was up2date, but my games ssd was not. So I updated the fw of my samsung 850 evo and guess what?
Its finally all ok now!! Thanks again for the tip!
ps.: i am flying in vr (rift)