OS: XP SP2 / Vista SP1 / Windows 7 Processor: For XP 2.0 GHz P4 processor or equivalent; For Windows Vista and Windows 7 2.4 GHz P4 processor or equivalent Memory: For XP 1 GB RAM / Windows Vista and Windows 7 1.5 GB RAM* Graphics: 128 MB Video Card with Pixel Shader 2.0 support. DirectX®: Hard Drive: At least 500 MB** of free space with at least 1 GB of additional space for custom content and saved games. Supported Video Cards: Nvidia GeForce series: FX5900 or better, and all NVidia G, GT, GTS, and GTX video cards. ATI Radeon™ series card 9500 series or better, X300, X600, X700, X800, X850, X1300, X1600, X1800, X1900, X1950, 2400, 2600, 2900, 3450, 3650, 3850, 3870, 4850, 4870, 4890 series or better; Intel® Graphics Media Accelerator (GMA): GMA 3-Series, GMA 4-Series * For NVIDIA ION™ computers, the game requires at least 2.0 GB RAM. ** 9.6 GB of hard drive space if installing with The Sims 3. Please note that the GeForce 6100 and 7100 cards are not supported. The NVIDIA GeForce FX series is unsupported under Vista.