Soldato
Fifa 15 and 16 (demo) are not hard locked, run both at 5k dsr 144hz no problem, both sit in the 120-140 fps region.
As for crysis, if my memory serves me well, you can force the game into borderless window full screen, it then forces the game to run at the same refresh as your desktop, though this does (or did?) Kill crossfire if you used it.
Wrong the frame rate is indeed unlocked but the refresh rate is locked at 60hz its talked to death over on the official forums and if you must check what your display is outputting.