Variable Refresh Rate

Variable Refresh Rate and Frame Timing

A game can render one frame in 8 milliseconds and the next in 14. A conventional display running at a fixed refresh rate does not adjust its scan timing around those changes. The graphics source and the display therefore operate on separate schedules, and the mismatch can appear as tearing or uneven motion. Variable refresh rate, commonly shortened to VRR, changes that relationship. Within a supported operating range, a compatible display can vary the interval between refreshes so that new frames are presented closer to the time the source finishes them. The display is still refreshing one complete image after another; the timing between those refreshes is what changes.