Battlefield 3 PC System Requirements

Minimum: 
Core 2 Duo@2.0GHz 
2GB RAM 
GeForce 7800 GT / ATI X1900 
256MB Graphics Memory 
Windows XP 
Hard disk space: 15GB for the digital version, 10GB for the disc version

Recommended: 
Quad Core 
2GB RAM 
GeForce GTX 260 
512MB Graphics Memory 
Windows Vista and Windows 7 
Hard disk space: 15GB for the digital version, 10GB for the disc version