OS: Windows® XP SP 3 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: (Minimum) Dual core with 2.1 GHz (Recommended)Dual core with 3 GHz 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)AMD Radeon 3870 or NVidia GeForce 8800 GTX (512 MB VRAM) (Recommended) AMD Radeon 4890 or NVidia GeForce GTX260 (1 GB VRAM) HDD : 6 GB of free Hard Drive Space