I have always wondered why my good quality Sony 21" G520 could only reach 85hz at all resolutions. I knew that if you set the refresh rate higher than the monitor could produce you would most likely not see anything , monitor would go blank and would have to reboot into safe mode to bring the levels back into functionalbe levels. Well I unchecked the box that allows me to go outside of what windows would recommend and it gave me 100hz+ to play with. Just curious and thinking it would do this I tried 100hz and 120hz. Well 100hz work 120hz clipped out and went blank screen. Well so I reboot and go into safe mode to change it back. Turns out I can not change it in safe mode cause that area just displays "default settings" Well then I tried to uninstall the video drivers thinking that would cause my monitor to boot into the 60hz that I needed to see the picture again. nope nothing. Also tried "last good config", "boot into vga mode" and still nothing. Still windows is making the monitor boot into 120hz. How can I lower this. I swear I have been able to fix this in safe mode before. now I am stumped. Whats up, how do I fix this?