What I mean is the fact that the recommended spec for Far Cry 2, which isn't an old game by any means, are:
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
You have 512mb of RAM and a nvidia geforce 6800, which is the minimum required graphics card. and not even enough RAM for the minimum
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)
I couldn't tell from looking at your specs what your processor speed is.