Question 75Hz setting for every 3D game

[dejtamibabe]

How can I force the Samsung LS19MYAKBB/EDC monitor to have a refresh rate of 75Hz in 3D games?
I can normally set the refresh rate to 75Hz in the graphics settings from the control panel, but when I start a 3D game, regardless of the resolution, the refresh rate is 60Hz. In the game graphics settings in some games there is an option to set the Hz refresh rate, but not in all games.
In the question, I assume that this Samsung LS19MYAKBB/EDC monitor supports 75Hz refreshment because it is officially written that this monitor supports such refreshment and on the desktop in every system it only supports 3D games, there is not always an option to set the refreshment to 75Hz.
In CRT monitors, the Hz refresh rate affects screen flashing and eye strain. The higher the refresh rate, the less the image flashes and the less tired the eyes are. Does the Hz refresh rate also affect eye fatigue in thin monitors?

 

[TheELF]

How can I force the Samsung LS19MYAKBB/EDC monitor to have a refresh rate of 75Hz in 3D games?
I can normally set the refresh rate to 75Hz in the graphics settings from the control panel,

Which control panel? Windows? If you change it from nvidia or amd (or intel) it will stick in 3d games, at least that's how I did it with my normally 60Hz monitor. You need to go to the custom resolution setting and then copy the normal resolution only changing the refresh rate.

Does the Hz refresh rate also affect eye fatigue in thin monitors?

No, but it does make the movement smoother which can have an affect on the movement sickness some people get in games.