I upgraded to an RTX 2070 from a GTX 1060 (no performance boost at all, in P3D, but thats besides the point).
I have an issue where, unless Vsync/Tripple Buffering is enabled, whenever I move the mouse view around in the Cockpit and let go, the bottom half of the screen will "flicker" black for a split second.
On my GTX 1060 I never used Vsync and did not have this problem. A driver issue maybe?
I do not have this flickering in XP11 or Battlefield 5 etc.. but for example in the "origin" app it has also happened.