One of the nice features about the Sapphire overclocking utility is the find the maximum function. Click a button and the utility will run tests at each clock increment for a user specified time. If no errors are detected at that clockspeed, the next clock stepping is used. This is a pretty slick process and seems more accurate than the process used by the NVIDIA drivers - attempts to move the clock and memory speed above the detected failure rate would result in crashes and artifacts.



Link: Neoseeker