Both processor and GPU chip are below the recommended specs, however lots of people running this fine on the specs youve posted
Please check though with the system requirement checker
here
Can you post your in game settings as screenshots so can take a look at your settings, there's some issues with some of the bits in Fifa 13 as its a pretty poor port of the console edition.
One of the fixes is to physically delete your settings file then re-run the game and see if that fixes it.