Disable vsync and disable iFPSClamp: Screen-Tearing.Disable vsync and enable iFPSClamp: Screen-Tearing and game play is too fast (When FPS is the double of the iFPSClamp value then game play is twice as fast).Enable vsync without iFPSClamp: No screen-tearing but game stutters even when FPS is high.Enable vsync and iFPSClamp: No screen-tearing and smooth game play but slow-motion in some areas.Some regions in the game are producing significant FPS drops which seem to be unrelated to the video settings. Another problem is that this also happens on the lowest video settings. But as soon as it drops to a FPS like 50 the game runs in slow motion, which is also not acceptable. With this setting the game is absolutely smooth as long as the FPS does not drop below 60. The only solution I found so far is setting the following option in fallout.ini: iFPSClamp=60 This is especially noticeable when moving sideways. Afterwards, the FPS stabilized at 60, but the game stutters. But I hate playing without vsync because the video tearing is unbearable, so I enabled it. The game normally runs with 70-90 FPS on highest settings when not using vsync. I'm playing Fallout: New Vegas on a decent machine.