Why this much. Ubisoft has posted what kind of machine you will need to run Far Cry 2 and what we have is not too bad:
Minimum requirements
CPU: Pentium 4 3.2 Ghz, Pentium D 2.66 Ghz, AMD Athlon 64 3500+ or better
RAM: 1 GB
Video card: NVidia 6800 or ATI X1650 or better
Shader Model 3 required
256 Mb of graphic memory
Media reader: DVD-ROM

Hard drive space: ~12 Gig or HD space. (tbd)

Recommended
CPU: Intel Core 2 Duo Family, AMD 64 X2 5200+, AMD Phenom or better
RAM: 2 GB
Video card: NVidia 8600 GTS or better, ATI X1900 or better
512 Mb of graphic memory
Sound: 5.1 sound card recommended

Supported Video cards:
NVidia 6800, NVidia 7000 series, 8000 series, 9000 series, 200 series. 8800M and 8700M supported for laptops. ATI X1650 – 1950 series , HD2000 series , HD3000 series , HD4000 series .