What section does it say this under?
nForce 610M is a mobo chipset, and the M sounds like this is a laptop.
In which case, the 1.7GHz you said about before should be your CPU speed.
I didn't think that they made a 7000 GPU though, but they may have done it especially for laptops.
The best thing for you to do is google for the System Requirements Lab and run their test for CoD4, it will tell you if your PC is capable of running the game.