Overview: Refresh and synchronization
Refresh and synchronization connect frame presentation to a display's update schedule.
The source cadence and the screen's refresh schedule must form a presentation arrangement. Frame-rate matching, VSync and VRR address different parts of that relationship. Their pages explain the timing decision, including what varies and what remains fixed in the selected mode.
Display refresh rate
Display refresh rate describes how often the output refreshes or scans pictures, independently of how often the source contains a new picture.Frame-rate matching
Frame-rate matching selects a display timing compatible with the source cadence so source pictures can receive regular presentation durations.Vertical synchronization (VSync)
Vertical synchronization coordinates presentation with display refresh boundaries to avoid showing incompatible picture updates within a scan.Variable refresh rate (VRR)
Variable refresh rate allows a supported display route to vary presentation intervals within a defined operating range.