https://www.techradar.com/news/nvidias-quest-for-the-ultimate-4k-hdr-gaming-monitor > The first two Nvidia G-Sync HDR monitors, the Asus ROG Swift PG27UQ and Acer Predator X27, are bar none the best two looking gaming monitors currently on the market. > But what is an Nvidia G-Sync HDR monitor anyway?