Nvidia G-Sync and AMD FreeSync are two Variable Refresh Rate (VRR) technologies that eliminate screen tearing while gaming by dynamically adapting your monitor's refresh rate to match the game's framerate. There's a history of back-and-forth between the two technologies, with Nvidia and AMD competing to outdo one another. These days, the differences between the two technologies are few and often small -- but not nonexistent.
NVIDIA G-Sync vs AMD FreeSync: What's the difference?
Here is everything you need to know about NVIDIA G-Sync and AMD FreeSync adaptive sync technologies, including how to decide which is right for you.