The info first popped up ina post on NeoGaf. As usual, the French publisher has yet to confirm the info, but it may serve as a broad indication of what gamers will need in order to run the game smoothly:

Minimum requirements:
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 256 Mb of graphic memory
Media reader: DVD-ROM
Hard drive space: 12 Gig of HD space. (TBD)

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

Far Cry 2 will be released on PC, Xbox 360 and PlayStation 3.