I think I found a bug,installed the 4.11 with new CCC and my refresh rate stayed at 60Hz(even at desktop),weird thing was both CCC and monitor tab reported it at my 90Hz setting or whatever I selected but just would not work.
Anyway I uninstalled the 4.11s and CCC,went with 4.11s and old CC and it`s all fine,refresh rate setting I select now works fine even at desktop,I did use Driver Cleaner for both drivers and installed my monitor drivers(using Samsung 1100DF in BNC mode) so I`m thinking its a bug with the new CCC and BNC mode.
FYI I had no problems with 4.10s and new CCC.