OS: Windows® XP SP 3 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: (Minimum) Intel Core 2 Duo @ 2.4Ghz or AMD Athlon X2 5400+ (Recommended)Intel Core i5 or AMD Phenom II x4 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) GeForce 7800/Radeon X1800 or higher (Recommended) GeForce GTX460 or ATI Radeon HD 5850 HDD : 3 GB of free Hard Drive Space