Just got my new 1070 TI in today. Also have 16gb of DDR3 and an I7-4770. I got a 144 htz monitor for christmas.
Playing overwatch I sit at about 80 fps. In wow, the max I can see is 65 ish. Wow won't let me use 144 htz unless im in fullscreen, otherwise it changes to 60 htz and turns gray so I can't adjust it. That is using the blizzard recommended settings, not the nvidia optimized settings. I am still noticing some stutter, not tearing, but it only seems to be when I first start moving after sitting for a minute.
Any suggestions on settings, how to get windowed-borderless in wow, and why I can't get to 144 fps?