far cry 2 benchmarks: whats wrong here?

my system specs :intel core 2 quad q9300(2.5ghz)
:2gb 800mhz ddr2 & 1gb 800mhz ddr2 ram
alit hd4850 sonic (catalyst driver version 8.12)

i ran the far cry 2 benchmark at these settings: 8x antialiasing & overall ultra high settings.
here are the final results at different resolutions:
a) 1024 x 768:
- *www.flickr.com/photos/8985270@N05/3099774459/

b) 1280 x 1024:
- *www.flickr.com/photos/8985270@N05/3100613774/

c) 1360 x 768:
- *www.flickr.com/photos/8985270@N05/3100612688/

d) 1440 x 900:
- *www.flickr.com/photos/8985270@N05/3100611756/

e) 1680 x 1050:
- *www.flickr.com/photos/8985270@N05/3099775747/

why am i getting so low framerates?