However, VSync is not without its own issues. This helps alleviate screen tearing for the most part. So, for instance, if you are getting 100 FPS in a game on a 60Hz monitor and you turn on VSync, instead of your GPU sending 100 frames per second to your monitor, it will wait for a given period of time to send each frame to your monitor so that it matches the monitor’s 60 frames per second output. So, now, instead of your GPU producing frames at a much higher rate than your monitor can refresh the screen, your GPU will be capped at a rate that matches your monitors refresh rate. Essentially, what vertical sync (or VSync) does, is to force your graphics card to operate at a rate that is no higher than your monitor’s refresh rate. To combat screen tearing, developers came up with a solution called vertical sync. When this happens and depending on how fast the GPU is sending data to your monitor, you might see what appears to be a “torn” image. However, since monitors typically operate at a fixed refresh rate, the monitor cannot refresh fast enough to keep up with all of the data that the GPU is send it. And, the more powerful the GPU you have, the faster it can send data to your monitor, which results in a higher framerate. When you’re gaming, different scenarios will require more processing power, and so the GPU will not be able to send the necessary data to your monitor in as quick of a manner. GPUs, however, do not operate at a fixed rate. Most modern monitors operate with a 60Hz refresh rate, which means that every second they cycle through 60 different images (frames.) This means that over a given period of time, a monitor will show a set number of images (frames) on the screen. Most monitors operate at a fixed refresh rate. And, thousands of those frames played in rapid succession will appear to you as a video or the motion in a game. To you, all of those individual pixels will form a single image (or frame). In computers, the graphics processing unit (GPU) is responsible for sending the necessary data to the monitor that tells the monitor what color to make each individual pixel on its screen. However, before you can understand what VSync is and whether or not you should be turning it on in your games, you should first understand what screen tearing is. VSync (or vertical sync) is a feature that attempts to help your graphics card and monitor to operate at a rate that is conducive to providing smoother gameplay. If you’ve gone into your favorite game’s graphics settings recently, you may have noticed a featured called VSync with the option to turn it on or off and you may be wondering what it is and whether or not you should turn it on, or leave it off.
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February 2023
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