Variable refresh rate

The refresh rate can continuously vary seamlessly anywhere within this range. On displays with a fixed refresh rate, a frame can only be shown on the screen at specific intervals, evenly spaced apart. If a new frame is not ready when that interval arrives, then the old frame is held on screen until the next interval (judder) or a mixture of the old frame and the completed part of the new frame is shown simultaneously (tearing). Conversely, if the frame is ready before the interval arrives, then it won't be shown until that interval arrives. Variable refresh rates eliminate these issues by matching the refresh rates of a display to be in sync with the frame rate from a video input, making the display motion smoother. Although VRR is strongly associated with video games due to such content having unpredictable, discontinuous frame rates that would benefit from the technology, it is also useful for media whose frame rate is fixed and known in advance, such as film and video. Being able to sync the refresh rate with industry-standard framerates (24, 25, 29.97, 30, 50, 59.94, and 60 FPS), it again helps to eliminate screen tearing.