Download ATITool – Overclocking graphics card on computer …

ATITool is a special tool that can be used to optimize graphics cards using ATI GPUs and still run well on nVidia GPUs. You can perform hard overclocking just like running any other software and should let the program run for as long as possible for at least 2 hours so that you can play games comfortably after that without worrying about the system crashing or rebooting.