Trine 2 frame rate

[Colonel_basic]

I noticed playing trine 2 in 3d that if the frame rate dips 1 frame below 60fps it goes straight down to 30fps, i tried using tripple buffering but it still does it. Is this just a game problem or is it a general drawback to 3d?

 

[Dauthi]

sounds like vsync, or am i missing something?

 

[Colonel_basic]

V-sync gets forced on by default using 3d to maintain 120htz (60-60) though i thought forcing tripple buffer would stop the huge fps drop