The Video Electronics Standards Association (VESA) today announced that it has published the first major update to its Adaptive-Sync Display Compliance Test Specification (Adaptive-Sync Display CTS), which is the first publicly open standard for front-of-screen performance of variable refresh rate displays. The updated specification, Adaptive-Sync Display version 1.1, features more comprehensive and robust testing, including expanding gray to gray (G2G) testing from a 5x5 test matrix to a subset of the much larger 9x9 test matrix, which results in more than tripling the number of G2G test scenarios. It also replaces the fixed percentage overshoot and undershoot limits when overdrive is enabled with limits based on values of Perceptual Quantization (PQ), which is better aligned to represent human sensitivity to light. These changes provide for a far better representation of the display's variable refresh rate performance, including significantly reduced undershoot allowances.

Companies can begin certifying their display products under the new Adaptive-Sync Display spec today. In addition, VESA will continue to allow products to be certified under the previous Adaptive-Sync Display 1.0 specification through the end of August 2023 in order to allow for products already in development that have been designed to meet the original specification, which was published in May 2022. A complete list of Adaptive-Sync Display 1.0 and new 1.1 certified products can be found at this page .