The minimum and recommended configurations are listed below...
Minimum
CPU: Pentium 4 3.2 Ghz - Pentium D 2.66 Ghz - AMD Athlon 64 3500+ or better.
Video Card: NVIDIA 6800 or ATI X1650 or better
Shader Model 3 required.
Memory: 1 Go
Media reader: DVD-Rom
Recommended
CPU: Intel Core 2 Duo Family - AMD64 X2 5200+ - AMD Phenom or better.
Video Card: NVIDIA 8600 GTS or better - ATI X1900 or better.
512 Mb of graphics memory.
Memory: 2 Go
Sound: 5.1 sound card
Media reader: DVD-Rom
Supported video cards: NVIDIA 6800 - 7000 series - 8000 series - 9000 series - 200 series - 8700m + 8700m for laptops. ATI X1650 - 1950 series - HD2000 series - HD3000 series - HD4000 series.
Far Cry 2 is expected to be released late 2008 a demo version is expected sooner - check back on Gamezplay for the latest information.