Hello, first of, I really like displayfusion, I'm planning to go pro when my trial end.

My game (rainbow six siege) is stuttering in borderless but not in windowed mode, nor in fullscreen, plus the DF taskbar flickers on my second monitor at the same time (flickers once every few 2 secs approx and only while in game)

How I describe the flicker:
-the DF taskbar on the second monitor disappear very quickly and reappear very quickly. It happens only with force full screen compatibility in DF settings. When this setting is off, the game is stuttering much heavier.

How I describe the stutter:
-I describe my stuttering as intermittent (smooth, then some frames of noticeable stutter, then back to smooth).

What I tried:
-Turning off displayfusion solved the stuttering (and obviously the taskbar flickering too). But I can't see the taskbar and enjoy DF with this solution.
-Forcing fullscreen in compatibility setting made the heavy stutter become an intermittent stutter, and created the taskbar flickering (the flickering happens when the focus is on the monitor displaying the game, not when it is on the second one)
-Turning off windows aero made things worst.

Some notes:
-borderless is 1920x1080, the resolution of both my monitor, and fps counter indicate 144fps.
-Intermittent stuttering and taskbar flickering no matter the in game aspect ratio chose (3:2 ; 16:9 ; etc).
-FPS counter shows not signs of fps drops, the stutter is not seen with fps counter.
-I have dual monitors (144hz and 75hz) on windows 7, and game on the 144hz one.
-In game V-sync is off; no triple buffering.

What I suspect:
-I might be extrapolating but I'm pretty positive the intermitent stuttering and the taskbar flickering happend at the same time (every 1.5-2sec approx).
-It might also have something to do with different refresh rates and borderless mode, since when the game is in windowed mode there's no stutter.
-It looks like my game runs smoothly when there's no flickers, then the moment the DF taskbar flickers on my 2nd monitor, i have some frames of heavy stutter, but this is hard to tell since the stutter is very quick but noticeable since it's an FPS game.

THanks ! (and sorry for bad english)