I'm in need of a new GPU since new hot games will come (Medal of honor / mafia 2 /crysis 2).. So obviously I need it for gaming.
The one I have now is 8800GT, the display is 1920x1080, and my budget is around 350$.
I have a friend that had 2 ATI and he always told me that the fan sound is so high for all ATI cards, and that he always have to manually increase the fan power before entering a game, which I never had to do it with my NVidia. So does all ATI cards have this fan issue?
As Jeffredo said, this Asus card does not have the reference cooling design, the one which you are saying is very noisy. Instead, Asus have put their own cooler on there that is quieter and up to "20%" cooler than reference card designs.
By suggesting that to you, i have attempted to minimise the issue you were most concerned with. The 5850 is a good card and will serve you well. Manual fan control is entirely up to you, so long as your drivers are installed right, the CCC should control your fan speeds just fine.