I bought an XG270 like OP has but I'm really lost about achieving this 120hz backlight strobing + pureXP smooth gameplay everyone is raving about. I've read this thread and blurbusters forums a few times but I keep running up against my own technical illiteracy around monitors and GSYNC...
If I've got the XG270, RTX 2070, Ryzen 5 3600x, and 100-160 FPS in TF2, what are the applications and settings I need to get OP's setup? I can discern the fact my card is G-SYNC compatible means something different, but I don't know what.
I have Elite Display Controller and NVIDIA Control Panel both presenting me with the option to set my refresh rate, for example. EDC allows me to turn on PureXP, and GSYNC disappears from NCP depending on whether I have Adapted Sync enabled or not (I have to disable it to unlock PureXP settings).