The Sims 3 Minimum Requirements
CPU: Pentium 4 processor or equivalent
CPU Speed: For XP 2.0 GHz Pentium 4 processor or equivalent; For Windows Vista and Windows 7 2.4 GHz Pentium 4 processor or equivalent
RAM: For XP 1 GB RAM / Windows Vista and Windows 7 1.5 GB RAM (For NVIDIA ION computers, the game requires at least 2.0 GB RAM)
OS: XP SP2 / Vista SP1 / Windows 7
Video Card: 128 MB Video Card with support for Pixel Shader 2.0 [Nvidia GeForce 6 series or better (GeForce 6100 and 7100 cards are not supported), and all NVidia G, GT, GTS, and GTX video cards. ATI Radeon™ series card 9500 series or better, and all ATI X, X1, and HD video cards; Intel® Graphics Media Accelerator (GMA): GMA 3-Series, GMA 4-Series]