Oh well i tested different FPS settings yesterday. It seems even with 170 fps there are micro lags also known as "jitter".
When you use Radeon Pro please limit your FPS at 165 fps for the sake of fairplay.. To be honest it doesnt increase your ability to aim with 2.00er. As for 4.00er and 8.33er my aiming quote was a little better (but still measurable). Didnt test in group combat yet.