Official minimum system requirements revealed:
OS Windows XP, Vista/7
AMD Athlon 64 X2 Dual-Core 4000+ or better • Intel Core 2 Duo Processor 2.0GHz or better
Windows XP: 1.5GB RAM • Windows Vista and Windows 7: 2GB RAM • PCs using a built-in graphical chipset, 2GB RAM recommended.
ATI X1800 or better* • nVidia 7800 or better* • Intel 4100 Integrated Graphics or better*
8x or better DVD-ROM
From IGN