Hey I got a new 75hz monitor plugged it in and it was running at 1080p 75hz until today that is I decide to make it the primary display now I can't even set a custom 75hz resolution as it says it is not supported
If you desire to have other Forum Users help you, I suggest you give a lot more information on your computer setup : INFORMATION REQUIRED WHEN POSTING A QUESTION
try 60 hz
Try to completely turn off your monitor. Maybe try to unplug the power cord for a couple of minutes. Then check your monitor's OSD to see if 75Hz mode is enabled.
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