Lark

any one know why i have to keep getting my screen hz to 120.. every time i restart the laptop it goes back to 60hz

hello.. i have recently had to upgrade my alienware m17 r3 120hz 3d 580m to the 780m as the card finally died.... the problem i have is.... i load up windows goto nvida control panel and set the refresh rate to 120hz and then close... every time a reboot the computer it will default back to 60hz and i have to change it back to 120hz i have not overclocked the card or done vbois if that makes any differnce i happy as is... the main computer bois i unlocked a12. did that along time ago as i wanted the ssd...... like the guide said i disabled sound ... bois was already set to peg but enable other peg setting and disabled igd (top line setting)) i tried to google this and had no luck.. some details that may be usefull windows 7.. drivers 347.52 with a modded inf.. i will how ever now download the ones of here as im a member and i could not use this web site inf before..... what i have tried is going into the regedit and searching for all DefaultSettings.VRefresh and changing it to 78 hex witch is 120hz then report the pc and it still comes back up as 60hz on the nvdia control panel... if there something in the modded inf file that resets it to 60hz res is 1920x1080.. that part does stay the same...... after i change it to 120hz i get no problems other than it resets to 60 after a reboot i did try the right click on desktop change resolution - advance - monitor 60hz to 120.. apply and reboot and it goes back to 60 as well i also noticed after a reboot out of all the registry keys changing them to 120hz this key does change back to 60hz HKEY_LOCAL_MACHINESYSTEMControlSet002Hardware ProfilesUnitedVideoCONTROLVIDEO{5DE5FA84-39E2-49D1-AB58-3CF8C769148D}