Samsung monitor overclock and dual monitor setup issue

[Tomas_12]

Hello guys,
I recently received a new SAMSUNG 24D300H.
So now I have a dual monitor setup using my new Samsung 24' (as the main monitor) and an old 19' Acer monitor.

The issue is, that when I'm in a fullscreen application on the main monitor and I want to do something at the second monitor (look up something in the web browser, etc...), the fullscreen application minimizes. Is there a way to use the second monitor without minimizing the application ?

And the second thing, I overclocked the monitor from 60Hz to 75Hz using the Nvidia control panel custom resolutions. When I tried 78hz, the monitor said: "Not optimum mode, optimum mode is 1920x1080 60Hz and after a while, the monitor shut down, so I went back to 75Hz and it seems to work fine. No artifacts appear and there is no frame kipping.

Is it safe ? And will it shorten lifespan of the monitor ?

BTW: Does HDMI support 75Hz on 1080p ? (I've read it doesn't, but I'm most definitely noticing big differences in CS:GO)

http://postimg.org/image/f1k3o0tk9

http://postimg.org/image/q1tsn7xvx

 

[popatim]

You need to run the app in 'Windowed full screen mode' if its allows it.

 

[Tomas_12]

You need to run the app in 'Windowed full screen mode' if its allows it.

Thanks ! That helped. And what about the overclock ?