you'd need an incredably fast CPU, something like a core i7 9xx overclocked to about 5Ghz and atleast a pair of Overclocked GTX480s in SLI.
In atleast one part of the benchmark my PC goes down to about 40FPS using a core i7 920 @ 4.4Ghz and 2 x HD5850's at 950/1200.
Its not like its a game so the FPS shouldn't really matter TBH. A 7900 GS will struggle to run the benchmark.
Play some games, its more fun!.