sure gsync range is from 24fps all the way to 144fps , any dips below 30 fps you will feel the game smooth. It is a revolutionary tech , i have the pg 279q with gsync it is awesome.
Parth Desai AMD in the Free Sync 2 models yet to come ( The Samsung CHG70 and CHG90 are the only monitors now that has Free Sync 2 which is LFC Compliant) - Low Frame Compensation Like Gsync with range of 24fps to 144fps. The current FreeSyn c Monitors are like lottery few of them supports LFC the the majority has a range starting from 45fps.