LG 29UM67 how to enable 75Hz?

Aftermath23

Reputable
Aug 29, 2015
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I just got 29UM67 from LG fun monitor I just don't know how to enable 75Hz mine only came with A HDMI cable. I have a GTX 970 with the monitor I know it requires a ATI card to enable free sync but I heard you can enable 75hz on nvidia cards?