I need your help and who better to ask than the creator of RivaTuner? I have the Witcher 3 (legit game by the way) and my computer, even if it can hold 60 fps, is not always possible in the game, my monitor is 75 Hz or 75.004 for more precise numbers, I discovered that the game works wonderfully and very smooth with nVidia half refresh rate at 37.5 fps, not single fps drop. I used RivaTuner to get correct frame time, I did this: [Framerate] Limit=37504 LimitDenominator=1000 The game works wonderful, except when the frame decimals start to fight each other; when in the game, it goes 37.5, 37.4, 37.5, 37.4 and it does create some small stutters from time to time, I have found out that 37.4 26.6 ms seems to works better (it should not, but it does): [Framerate] Limit=37499 LimitDenominator=1000 That way, the frame rate is 37.4 all of the time, but I think the image is not a 100% stable, seems to have extremely small stutters, maybe its just me seeing things, but I think its there. At 37504 is 100% smooth except when the frame time decides to fight with 37.4, then 37.5, this is completely random and can happen at any moment. How can this be solved? Witcher 3 is the only game that presents this issue or at least, very, very often, I have seen it in other games, but like 1 or 2 times every 5 minutes, Witcher 3 is often, happens at any place. Can you help me?