gasaraki :
What Wildcard said is wrong btw.
Explain why.
If someone is using a 144hz that doesn't support Freesync/Gsync and the FPS is not stable around 144hz then there going to experience screen tearing/stuttering. Even with a AMD GPU/Freesync you still need to keep the FPS within the Freesync range which is 48-144hz. I explained that if you cannot maintain 144hz in a game then you should adjust the refresh rate appropriately to keep the FPS around the hz set for the game, doing so with vsync will help with screen tearing/stuttering.