From what I can tell so far, the game should work perfectly fine on your computer as you easily meet even the recommended system requirements for the game.

I think that in this case it would be best if you got in touch with us directly by creating a Support Ticket.

It would help us enormously in pinpointing the issue if you could attach your DxDiag report to the ticket.

Please try installing the latest Physx software.

Try resetting your configuration files. To do this please press the WIN key+R and type:
%USERPROFILE%\Documents\My Games\

Once here please make a backup copy of and delete the following folder:
SpecOps-TheLine

Some users recommend trying Flawless Widescreen for the game so hopefully you might have some luck with this.

You might also like to have a look at the following troubleshooting guide.

That said, should none of the above help I really recommend dropping us a support ticket.