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DisplayPort input is 1.2 (see page 13 of https://www.bhphotovideo.com/lit_files/127123.pdf). 144 Hz is a valid refresh rate, including at the maximum resolution supported (1440p) provided you use the DisplayPort input instead of HDMI.
Sorry, there was a problem. Please try again later.Yes, the display port is version 1.2.
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