I have shuttering when playing FIFA 2013 & FIFA 2014 and that happens at min 13 when I or the rival score a goal
and even when nobody scores goals it also happens at min 21
Note: The same version of Fifa 2013 was with a high game level on GT 440 & there was no problem.
My Settings IN FIFA 2013 & 2014
Screen Resolution 1600×900
Game Level Settings High
Frame Rate No Limit on fps