So I just bought this new monitor; ASUS ROG Strix XG279Q, and I have mostly everything turned on: G-Sync, 165hz at 1440p, E-LMB sync, and my own color calibration, but for some reason the "OD" or overdrive setting on the monitor isn't illuminated and won't let me select it, and this is the way to get faster response times, so I'd like to use the feature.
Anyone know how to maybe resolve this issue?