Vsync/FPS issues

[bongpig]

Im having difficulty getting the game to run without stutters and screen tearing. Im using a laptop with an i7 + 7970m. Im using the 15.8 drivers.

Ive set the game up to run at 1280x720. All settings at their lowest. The steam in-game FPS counter shows a solid 60fps at all times. But the game tears and stutters horribly.

Ive noticed several issues/curiosities:-

- I get severe tearing regardless of vsync being on or off. Tearing is also very apparent even if the game is running at a solid 60fps.

- When the settings are turned up to high, the game drops to 40fps with vsync on, but shoots back up to 60+ when off. This is a bit strange.

- My gaming monitor can handle several refresh rates. I tried setting it to 50hz and turn the in-game framerate to 50fps, but this locks it to 30fps. It seems none of the in-game framerate options ( 25, 29, 30 or 50 ) do anything except lock the rate to 30.

- disabling in-game vsync and enabling it in my driver gives me even worse stutter and tearing.

Basically, I simply cant get the game to run smoothly regardless of any options that I set. Even at the absolute lowest settings there is heavy stutter/tearing, even though the fps counter shows a locked 60.

I checked through the troubleshooting guide and found no issues there.

Anybody have any ideas?