Open AMD Radeon FreeSync technology eliminates lag and tearing in games by dynamically clocking the monitor in sync with the speed of the graphics card pipeline. Its analogue is the closed standard NVIDIA G-Sync - but recently the green camp has also begun to support FreeSync under the G-Sync Compatible brand.
During its development, technology has come a long way. The current version of the AMD Radeon FreeSync 2 HDR standard includes not only increased requirements for the monitor frequency range (low frame rate compensation technology, Low Framerate Compensation, LFC), but also requires support for output in the HDR standard for games, films and other digital materials. In a recent video, the company outlined its strict monitor certification process to ensure high image quality:
David Glen from AMD's display technology department explained that FreeSync is a system-level specification built on top of the open cable layer protocol - VESA Adaptive Sync. The key requirement for certifying a monitor for FreeSync is the minimum input lag time (that is, between the arrival of a picture and its output). The second important requirement is low backlight flicker throughout the entire frequency range. AMD makes a lot of other requirements designed to ensure good performance in the user and gaming environment when working with a particular monitor.
Another specialist in the display department at AMD, Syed Huassain, noted that AMD has already certified about 600 displays. But almost every day the company receives new monitors for certification, and each of them passes all the required tests in order to ultimately receive the right to wear the coveted brand.
By the way, the number of tests varies: if for compatibility with FreeSync you need to pass hundreds of tests, then to obtain compliance with FreeSync 2 HDR you need, according to the manufacturer Radeon, to successfully pass thousands of tests. The fact is that FreeSync 2 HDR not only raises the bar in the performance of frame synchronization technology, but also sets high demands on image quality: color rendition, backlighting and other indicators. By the way, today FreeSync is available outside of the PC thanks to technology support on the Xbox One S and Xbox One X consoles, as well as on some TVs.
Source: 3dnews.ru