So my computer is pretty good, it can all but max out _Max Payne 3_, _Mass Effect 3_ and plenty of other games. But for some reason, even on the lowest settings (1280*800 resolution with everything set to off or low) _Prototype 2_ still lags a bunch. What is the deal with that?

Machine Specs:

    Twin HD 5770 in crossfire.
    Processor is quad core i5
    4GB DDR2 Ram (Maybe it is this?)
    SSD hard drive (but its running from a 7200rpm hard drive.)
    

Any ideas?