Holy crap, at stock clocks my card has never hit these temps before! I have a HD 7850, and those temps are crazy considering not a single one of my other games gets past 70 degrees. Anyone else getting similar temps?
Oh yea I had that case for a day had 2 560Ti's in it and it was as warm as warm could be in that case. Do you use the mesh instead of the window? What CPU cooler do you use. There are a lot of places for fans so there may be room to work with the air flow of the case to help.
Make sure your cable management isn't blocking any fans, because something in the game is making your GPU run at higher settings than other games, and either the fan isn't powerful enough to handle FC3 on ultra. Try turning your settings down/getting better airflow and more case fans, a PC can never be too cool.
Well also the 600T is pretty bad with airflow cable management will help certainly but you want to make sure you have enough airflow in that case or else your cpu and gpu will suck that air drier then the Sahara desert.