@Lar_q: Thanks for the further info smile After your explanation I tried to set my refresh rate to 59hz but the "problem" is, nvidia hides that option in the 260.xx releases of their forceware driver... in earlier releases you could easily switch between 59hz and 60hz from within the resolution menu (the setting is still there but shows only 60hz as an option if you're on a standard tft without any 3D Vision stuff...). Now you have to create a custom resolution profile and must set manual timing settings. However, I did that and it also changed nothing... frown Hope you guys figure something out tomorrow smile