I've an application, which runs on full screen. How to set monitor frequency?
For example: application 640x480, I need to set the 85 hertz.
You can't - Windows should use the highest refresh rate that monitor supports at that resolution, or at least the desktop refresh rate. I think a lot of monitors only support high refresh rates at their intended resolutions, so it physically can't display that resolution at 85 Hz - so you might be stuck at 60 Hz for 640x480.
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Ok.. Thanks for answer.