OS: Windows® XP SP 3 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: (Minimum) 2.4 GHz Intel Core 2 or 2.4 GHz AMD Athlon x2 (Recommended) 3.0 GHz Intel Core 2 Duo or 3.0 GHz AMD Athlon II x2 or better Memory: (Minimum) 2 GB RAM (Windows XP) / 2 GB (Windows Vista and Windows 7) (Recommended) 4 GB for Windows ® XP, 4 GB for Vista / Windows ® 7 Video Memory: (Minimum) 256 MB nVidia 8600 GT or ATI / AMD 3850 (Recommended) 512+ MB nVidia 250 GTS or ATI / AMD 4870 or better HDD : 3 GB of free Hard Drive Space