You can actually experience what 30 fps on a gsync monitor feels like right now even if you dont have a Gsync monitor

This is a 144hz monitor so you want to aim for 144 fps to get the full advantage

Now 30 fps will feel smooth like an optimized 30 fps console game

I'm running a 7700K @ 4.9GHz with a 1080 Ti and even my rig can only just barely manage more than 140 fps in games like Overwatch and Battlefield 1 at 2560x1080