[5] FreeSync can be enabled automatically by plug and play, making it transparent to the operating system and end user.

The sync mechanism keeps the video interface at the established pixel clock rate but dynamically adjusts the vertical blanking interval.

This simple mechanism provides low monitor latency and a smooth, virtually stutter-free viewing experience, with reduced implementation complexity for the timing controller (TCON) and display panel interface.

AMD FreeSync requires the display to pass certification for low latency and refresh rate variation to match the render output of the graphics card.

[1] AMD FreeSync Premium mandates further requirements of Low Framerate Compensation (LFC) and at least 120 Hz refresh rate at FHD resolution.

[15] Requirements include removing the minimal frame rate and setting a maximum on screen latency.