OS: Microsoft® Windows® 2000/XP (Does not support Windows Vista/7) Processor: Pentium®IV 1.5 GHz or Athlon® XP 1500+ processor or higher Memory: 384 MB RAM Graphics: 100% DirectX® 9.0b compatible 64MB Hardware Accelerated video card and the lateset drivers DirectX®: DirectX® 9.0b (included) Hard Drive: 2.2GB of uncompressed free hard disk space (plus 400MB for Windows® swap file) Sound: 100% DirectX® 9.0b compatible 16-bit sound card and the latest drivers Multiplayer Requirements: Internet (TCP/IP) and LAN (TCP/IP) play supported, Internet play requires broadband connection and latest drivers, LAN play requires network interface card and latest drivers Supported Chipsets: ATI® RadeonTM 8500, ATI® RadeonTM 9000, ATI® RadeonTM 9200, ATI® RadeonTM 9500, ATI® RadeonTM 9600, ATI® RadeonTM 9700, ATI® RadeonTM 9800, all nVidia® GeForceTM 3/Ti series, all nVidia® GeForceTM 4MX series, all nVidia® GeForceTM 4/Ti series, all nVidia® GeForceTM FX series, nVidia® GeForceTM 6800*Important Note: Some 3D accelerator cards with the chipset listed here may not be compatible with the 3D accelerator features utilized by Doom 3. Please refer to your hardware manufacturer for 100% DirectX 9.0b compatibility. This product does not support Microsoft® Windows® 95/98/ME or NT.