Enfin bref, la soluce la + radicale ca reste celle la, elle marche qqs soit la carte et les drivers utiliser.
Go into Regedit, find key:-
HKLM\SYSTEM\CurrentControlSet\Control\Class\{4D36E96E-E325-11CE-BFC1-08002BE10318}
Under there will be folders numbered 0000, 0001, etc. The highest one will be your current monitor setting. Open that folder and there's another one called MODES, and a further one that will be the max resolution of your monitor (e.g. 1600,1200)
In there is a key Mode1 with a value such as
27-96,55-160
Change the highlighted value to your desired refresh rate
Now repeat the process for all your folders CurrentControlSet, CurrentControlSet001,CurrentControlSet002