The site was unsure, but it said that the recommended specs were:

Windows XP/Vista/7, Intel Core 2 Duo 2GHz or AMD Athlon X2 2GHz, 2GB of RAM, 15GB HDD space, NVIDIA GeForce 9600 512MB or ATI Radeon HD 2900 512MB and DirectX 9
Seems like a big difference from the benchmark, or maybe my geekanese is off. :/