d6bmg
BMG ftw!!
But my friend has this card on his dual core system and 1600x900 and he says fifa doesn't lag for him. I mean, FIFA is not a graphics oriented game so it shouldn't lag, right?
EDIT:
I just used AMD overdrive and overclocked it a little bit to 820 mhz and 1020 mhz and now skyrim has smoother frames in both day and night at high settings.
Use the latest catalyst driver.