According to Ubisoft, the system specs are as follows:
Minimum Specs
* DirectX9c graphics card with 512MB Video RAM * Dual core CPU * 4GB Memory
Recommended Specs
* DirectX11 graphics card with 1024MB Video RAM * Quad core CPU * 4GB Memory
Ubisoft also revealed the DRM for Far Cry 3 will be a one-time online activation with Uplay. After registration, online gameplay will be unlocked. Players will be able to play single player offline.