Nvidia GeForce 285 GTX / AMD Radeon HD4830 Graphics: 512 MB 3D hardware accelerator card required – 100% DirectX® 9.0c with Shader Model 3 support. Processor: Intel Core® 2 Quad 2.4 Ghz / AMD Athlon II X4 2.6 Ghz OS: Windows 7 or (Windows® XP (with Service Pack 3) and DirectX® 9.0c) or (Windows Vista® with Service Pack 2)