Ah, right, I'm so hopelessly stuck in the antiquated 60 Hz world I didn't even notice you have 144 Hz monitors like most people nowadays...
If they're G Sync or Freesync capable (which they likely are) and you have Gsync/Freesync set up correctly, you should find a framerate you can sustain like 95% of time and cap your framerate at that value, preferrably using Afterburner, you'll get more consistent frametimes and therefore smoother visuals and as a result also more consistent input lag.
If they're G Sync or Freesync capable (which they likely are) and you have Gsync/Freesync set up correctly, you should find a framerate you can sustain like 95% of time and cap your framerate at that value, preferrably using Afterburner, you'll get more consistent frametimes and therefore smoother visuals and as a result also more consistent input lag.