Also, one thing I forgot to mention.
A few months ago, I was big into playing Metro (last light redux and 2033 redux) aswell as bf4.
I was getting good frames in both. Now in bf4 even on the low preset, I get 60fps max, and it stutters like crazy. It is unplayable.
Same thing for metro, I get 80-100 fps on the Ultra high preset with 16x anistropic filtering, yet at some times, it stutters like crazy!
This is not a hard drive/ssd issue, as less demanding games, such as CSGO and H1Z1 don't stutter (while h1z1 doesnt exactly run great.. :< )