So I tried contacting Samsung and the indian guy tried to say that freesync only works at 60hz for this monitor. That makes no sense as freesync is completely useless at only 1 refresh rate. Amd doesn't even list this monitor on their monitor compatible page yet samsung is advertising it with AMD freesync, they just dont list the compatible refresh range it works at. This info is nowhere to be found. AMD must know it if they certified it to work with freesync.
In your case the variable refresh rate range is 70 – 144Hz via DP and 62 – 119Hz via HDMI