Far Cry 2 System Requirements

Far Cry 2 Minimum System Requirements:

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 (see supported Video cards)
Shader Model 3 required
256 Mb of graphic memory
Memory: 1 Gb

Far Cry 2 Recommended System:

Intel Core 2 Duo Family, AMD64 X2 5200+, AMD Phenom or better
NVIDIA® 8600 GTS or better,ATI X1900 or better
512 Mb of graphic memory
Memory: 2 GB
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.

Source: Far Cry 2 on Wizoo