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)