GPU DP 1.4 monitor DP 1.2

Solution
No problem. Displayport is backwards compatible. Your current DP cable should be fine and you can play at 1080p 144Hz. Also, since the monitor supports G-Sync, be sure to turn this feature on in the nVidia controls.
No problem. Displayport is backwards compatible. Your current DP cable should be fine and you can play at 1080p 144Hz. Also, since the monitor supports G-Sync, be sure to turn this feature on in the nVidia controls.
 
Solution