For example mouse movement is quirky and graphics jittery? Also I am susceptible to flickering being unintentional making me photosensitive, sound sensitive, and being a bit more quirky as well (I don't play that long as well, compared to others who get the same effect from playing a long time continuously). That is why, when i noticed jittery movement in games with this set up, I did not feel good. I normally manage well in other rigs which are not heavy duty and run smoothly, or smoother.
So should I over clock the cpu? If so, how do I do that. Please point me in the right direction.
usually there will be no bottlenecking, also get a nice cooler or the cooler i believe it supplied with the 990x. And in the bios adjust the multiplier, but also make sure your temps are within ~30 on idle and ~60 on full load. If things are jittery that is called micro stuttering and by disabling hyperthreading can sometimes help. But also make sure you have all the sli drivers and other things installed.