Damn, I need a new graphic card... the 980 GTX can't come soon enough to replace my good old 580 GTX.
On the preset "high" it's no problem... solid 30 fps, have no problem with that, I'm used to it from consoles. But on that setting it ignores the chosen resolution and renders in 720p... probably on the same level as the XBO. But if I chose 1080p or higher in the custom settings, the fps go down to 15 - 30 fps ingame and 20 - 30 fps in cut-scenes.
Update: doesn't run even good on a Titan