It's a common driver bug that's been going on and off with Nvidia. You're either stuck with window or full depending on which driver.
Well i stand corrected then, i just remember at gsync release people were saying it was "impossible" for gsync to work in windowed mode, they must have released a driver somewhere along the lines allowing it.
OCing the CPU will get you the best results. I got 4.5GHz with the same CPU fan. It's not on high load because WoW only uses 1/4 cores = 25% load. The clock speed on the 1 core the game is using is very important though.
On OW you should be able to keep a steady 144 fps with the 1070. If you don't, something seems to be wrong.
Last edited by truulte; 2016-07-19 at 08:26 AM.
Check this video out if you'd like a good mix of graphics and FPS.