LG G-Sync firmware update will arrive this week for 2019 compatible OLED TVs in North America. The company says three ranges of OLED TVs will receive the feature: E9, C9 and entry level B9. LG says TVs in other regions will receive the update before the end of the year.
G-Sync is a variable speed refresh technology of Nvidia that eliminates screen tearing by synchronizing your graphics card with your display. So far, this is a technology that is more common in computer monitors rather than TVs. However, recently, Nvidia has opened the standard, making it compatible with monitors that previously only supported AMD's FreeSync technology, and now some LG TVs.
G-Sync is Nvidia's technology to work, you will need a computer with an Nvidia graphics card, in particular GeForce RTX 20-Series GPUs or GTX 16 Series. When you plug into a compatible LG TV with a new firmware update, you will be able to experience variable refresh rates of up to 120Hz.
In the end, we will probably see most, if not all, of the TVs include variable frequency technology, since the latest HDMI 2.1 has built-in functionality. The new version of the connection is yet to come to the computer graphics cards. When this happens, variable refresh rates should be available with any combination of graphics cards and TVs, provided they both use HDMI 2.1.