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It is 2.0 from what I've been able to find. https://www.reddit.com/r/Monitors/comments/d1f4tm/lg_27gl850_with_hdmi_20_only_goes_up_to_100hz/
Sorry, there was a problem. Please try again later.There currently aren't any monitors from LG or any other manufacturer that feature HDMI 2.1 ports. The 27GL850-B features 2 x HDMI 2.0 ports and a DisplayPort 1.4 input. ^Daphane https://www.lg.com/ca_en/desktop-monitors/lg-27GL850-B
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