Im pretty much having the exact same problem as you, and its worth noting that mine crashes whenever I open the graphics options when its set to use the graphics card, not just when running the games, and only when using the Direct3D settings. OpenGL works fine. (Not that it's an acceptable option.)
Edit: Actually, I take that back, after reading the advice here, and cranking up the AF to 4x, it looks brilliant with the OpenGL, a big thankyou to everyone in this thread.
Edit: Actually, I take that back, after reading the advice here, and cranking up the AF to 4x, it looks brilliant with the OpenGL, a big thankyou to everyone in this thread.