DVI or Display Port, Display Port is considered the superior these days and the one to use for 144+hz gaming with G-Sync/FreeSync
Anyway Asus states for your monitor: *To activate 144Hz function (in 2D mode), both DisplayPort (or Dual-link DVI) and a selected graphics card with the latest driver are required. Please kindly contact the service center of your graphics cards companies for further technical supports.