Ya ffxiv sucks when it comes to duel gpu's. I have 5870 crossfire and run the game 60 fps on med-high settings. With crossfire enable the game runs like crap. When I cast spells it lags, its just all around crap. Have a friend with crossfire 4870's samething with his. Runs fine with a single card but once you crossfire them ffxiv rapes you. As far as weird noises go. I dont recall mine or my friends card making any weird noises while playing the game. (besides the fans kicking into overdrive)