Nvidia has released the 314.21 Beta driver which improves Tomb Raider performance and stability.
With Nvidia's previous drivers, AMD cards had a notable advantage over Nvidia's GPUs, especially with TressFX enabled in the new Tomb Raider that was just released. The new 314.21 beta driver aims to close this gap a bit.
Lastly, the new drivers also add a number of new SLI and 3D Vision profiles.
The 314.21 beta driver is available for download here.