DiRT 3 was released quite recently and has received a lot of praise from gamers and reviewers across the globe. It is the latest iteration of the Colin McRae Rally series, despite Codemasters dropping the Colin McRae branding. It supports DirectX 11 which enhances detail and brings a number of other visual enhancements to the gaming experience.
In DiRT 3 the performance gains when overclocking were minimal as it is a more graphics dependant game than some others.