All the Radeon cards sound like this or only the ATi?
I was planning to go for msi radeon 6870..
I got a 6870 and played with the manual settings in Catalyst Control Center. Of course the fan gets really loud when you manually set the RPMs to high numbers. However, on stock settings, where it is allowed to adjust the fan speed automatically based on heat, I can barely hear the card above the other case fans. The most intense game I have played so far is Oblivion on max settings. However, I do know that the 6870 puts out similar noise numbers to the Nvidia equivalents.