What is Vsync?

Vsync, or vertical synchronization, is a graphics technology that synchronizes the frame rate of a video game or application with the refresh rate of a monitor to prevent screen tearing. Screen tearing occurs when the graphics card outputs frames at a rate that doesn't align with the monitor's refresh rate, leading to visual artifacts. By enabling Vsync, the system ensures that frames are only displayed when the monitor is ready to refresh, providing a smoother visual experience. However, this can sometimes introduce input lag or reduce frame rates if the graphics card cannot maintain the monitor's refresh rate.