Install recommended nvidia drivers
System > Administration > Hardware run (as root, from consolt) nvidia-xconfig edit /etc/X11/xorg.conf xorg.conf

in my case works only sudo gedit /etc/X11/xorg.conf

Locate HorizSync and change it to 28.0 - 65.5

Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 65.5
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection