Quake IV System Requirements

Operating System: Windows® XP
Processor: Intel® Pentium® 4 2.0 GHz or AMD® Athlon® XP 2000+ processor or higher
Memory: 512MB RAM
Hard Disk Space: 2.8GB of uncompressed free hard disk space (plus 400MB for Windows® swap file)
Video: 100% DirectX® 9.0c compatible 64MB 3D hardware accelerated video card required
Sound: 100% DirectX® 9.0c compatible 16-bit sound card and latest drivers
DirectX® Version: 9.0c