Which DisplayPort version does it have?
DisplayPort 1.2 is required for native WQHD@144Hz support. All (GTX 650 Ti Boost or higher spec) ASUS GTX graphics cards offer this output.
Can DVI/HDMI be converted to DP via adapter?
DVI-DL does not have the bandwidth to support 2560 x 1440 at 144 Hz.
We do not recommend using an HDMI to DP adapter as this is not qualified or supported in Nvidia drivers.