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It also locks the frame rate to a maximum equal to the monitor’s refresh rate. The solution to this tearing is the ‘VSync on’ option which essentially forces the GPU to hold a frame until the monitor is ready to display it, as it has finished displaying the previous frame. Because only some of the screen is displaying the most recent information this can be thought of as a source of visual latency, too.
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Even if users don’t notice distinct tearing, the effect of that tearing (texture displacement and ‘juddering’) is often more obvious. It is generally less noticeable but it is definitely still there. Even on a 120Hz or 144Hz monitor, where some users incorrectly claim that there is no tearing, the tearing is still there. This results in a distinctive ‘tearing’ on the monitor that really bothers some users. This lack of synchronisation coupled with the nature of monitor refreshes (typically from top to bottom) causes the monitor to display a different frame towards the top of the screen vs. There is an excellent detailed technical explanation of these two modes and what they involve, using a 60Hz monitor in their example, on this AnandTech article.Īt the most basic level ‘VSync off’ allows the GPU to send frames to the monitor as soon as they have been processed, irrespective of whether the monitor has finished its refresh and is ready to move onto the next frame. They are forced to choose one of two main options that determine how the GPU handles its ‘passing of frames’ to the monitor– ‘VSync off’ or ‘VSync on’. This introduces something of a dilemma for gamers in particular. When running graphically intensive content, such as games, frame rate can be expected to fluctuate in response to varying levels of ‘demand’ from the game or application. Traditionally monitors operate at a fixed refresh rate – commonly 60Hz, 120Hz or 144Hz. How does G-SYNC act below the refresh rate floor of the monitor?.How does G-SYNC act at the refresh rate ceiling of the monitor?.Nvidia G-SYNC – a variable frame rate solution.