if you tried running a bench like 3DMark03 it will own your comp @ High Qaulity Setting, you'd get like maybe 15fps on most of the tests
. Whenever benchmarking a rule of thumb that i learned(at overclocking forums) is to put the slider for D3D and OpenGL to Optimal then restart, make sure VSync is off though
, then run the benchmark and your score would be pheunominal