After changing video card still have Fps Drops and Performance issues

[André Campana]

the game's own fps counter and either i can see it even with nothing counting the fps and as i've mentioned, if i enable V-Sync the problem occurs, if i disable it, i got a LOT of screen tearing that gives me headaches, c'mon, i can run bf3 on ultra at 720p at 50 fps with no lag not even fps drops, and i can't run amnesia, that has models with miserable 800 polygons most of them with 256x256 textures, you gotta be joking me