With the introduction of ATI's latest Radeon drivers a new utility was introduced which normally runs in the background and scans your system for the most stable (PCI &) AGP settings. If you wonder how to manually change the settings you will have to read more. About the tool: SMARTGART - ATI's proprietary diagnostic tool to determine the most stable AGP setting (for problematic systems), making the most stable drivers in the industry even more stable. How to activate: Click Start -> Run -> atiprbxx.exe /g Afterwards the tool should be shown on your screen similar to this: