OS: Windows® XP SP 3 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: (Minimum) Intel Core 2 Duo @ 2GHz / AMD Athlon 64 X2 Equivalent (Recommended)2.4 GHz Quad Core processor Memory: (Minimum) 2 GB RAM (Windows XP) / 2 GB (Windows Vista and Windows 7) (Recommended) 3 GB for Windows ® XP, 3 GB for Vista / Windows ® 7 Video Memory:(Minimum)NVIDIA GeForce 7900 GS/ ATI Radeon HD 2600XT (Recommended) NVIDIA GeForce 9800 GTX/ATI Radeon HD 4850 HDD : 10 GB of free Hard Drive Space/ Sound Card: Microsoft Windows XP/Vista or 7 compatible sound card (100 per cent DirectX 9.0c-compatible)