I have a Dell xps 8700 with a 960 mini a 750w PSU, I7 that comes with the xps 8700. I have a terabite hard drive and a CD drive and I stutter on games that are on normal one in particular GTA V I cleaned my computer, back in June or July of 2015 I bought the nvidia asus 960 mini, I had a nvidia 650 before I don't believe in uninstalled the old drivers. I had to update my bios and all that good stuff. I don't really have a good monitor, pretty small I'm I'm not sure if that could be causing it either. I can't play Ark Survival without lagging although since I bought the new PSU its been working fine so far. I experienced more stutter in Elder Scrolls Online.... -_- I'm not sure if itnws server lag or not but it sure as hell seemed like it was graphic lag. A lot of the time if I alt tab I see that 100% of my disc is being used. I am not sure if that's the problem I defragged everything twice. So what could my problem be.