o. No wonder hehe. With AA on, Nvidia cards take the hardest hit and it becomes nearly unplayable. (not really the case for 670's though, but it will suffer)
Have you tried Batman Arkham City MAX/Physics or Assassins Creed III. What core clock/memory clock do you have yours at? vcore?
I'm around 1180Mhz core on mine. Still can maybe go higher. These cards are great, hits max overclock before suffering from cooling issues. (680 has a 30% better heatsink though)