Earlier it was not know if the Asus MG279Q supports AMD FreeSync or not but today it was confirmed by an AMD representative that the Asus MG279Q will indeed support FreeSync technology. However it will be limited to a minimum of 40 Hz and a maximum of 120 Hz.
Here are the exact words of AMD,
AMD does not have a black or white list for FreeSync monitors, and while the monitor supports the standard DisplayPort 1.2a, it can operate at variable refresh rate (VRR) provided by the manufacturer.
An Asus representative confirmed that the new Asus MG279Q features variable refresh rates between 40 and 120 H which means it will be compatible with AMD FreeSync. Asus MG279Q specifications include a 27 inch screen with IPS type panel. It has resolution of 2560 x 1440 pixels and has refresh rates of 120 Hz. Asus MG279Q has a contrast ratio of 1000: 1, 350 cd / m2 brightness and viewing angles of 178 degrees.
Port selection includes DisplayPort 1.2a +, a mini Display Port, two HDMi and MHL port with two USB 3.0 ports. The monitor will hit the market shelves by the end of March at a suggested price of $ 699.