HELP! 38GL950G can't do more than 60Hz with custom resolution

[DG-87]

38GL950G is a 3840x1600@175Hz panel.

But when I make a custom 3440x1440 preset in NV control panel, I can't go over 60Hz...

The 2560x1440 selectable resolution doesn't have this issue.

 

[JediFragger]

Just tested it and can seem to create one fine at 160hz and at 8bit (RGB, Full). Have you tried a different cable? (I'm not using the cable it came with).