Tomb Raider on PC got another patch this weekend, launched in conjunction with new beta drivers from Nvidia for GeForce GPUs. Download the latest GeForce 314.21 drivers direct from Nvidia.
Since its launch, GeForce Tomb Raider players have seen "major performance and stability issues" trying to play the game at max settings. Complaints include problems with TressFX and tessellation tripping the game up, at least for those with 600-series cards.
There are more Tomb Raider patches incoming from Crystal Dynamics, based on ongoing player feedback.