Steve, the new Tomb Raider is pretty good on the PC. I am running on Ultra settings on my GTX680. There is slight pausing every now and then and NVIDIA and the game maker are working on it. They did not have any issues in the beta but some code change at the end may be causing it.
2013 2SS,CAI Intake Black, VMAX TB, Elite Catch Can, Hotchkis Chassis Brace, Hurst Shifter, 3.91 1LE Complete Rear End, NPP, 1LE Track Pack