Your pc is a borderline case, barely the min required to run crysis.
I don't think you can achieve playable frame rates beyond 1280 X 800 or something like that, @ low-medium settings.
As for COD 4, you should be good enough for med-high settings at the same resolution.
okay theres somge in specss...
The 8600gt is made to be 1gb and RAM is now 3 gb.Can i play crysis ,im not playing for graphics,im playing for fun and for skills like every true gamer.
and hey thanks for help and taking time for me....