In the bios mess with the AGP apature size, and maybe try higher overclocking for just your benchmark runs.
In Windows disable all the background programs you can, go into the admin tools in the control panel and disable as many services as you can to benchmark, Directx 8.1 apparently is the best for 01 so try that, Defrag Your HD, use powerstrip to overclock as it ussually gets the highest overclocks out of vid cards.
You could try the ACPI multi proccesor hack but that makes Windows ultra slow for everything else.