Well, you're correct!
I'm using 2 Sapphire 270x's.. I love the look of them and, apparently so, the fan speeds are configured very well.
I'd have thought that CCC would have been the factor controlling it all, though, not the make of the card. Though I could be wrong!
Edit: Started this thread a little bit ago, forgot I'd originally stated in my first post that I'd mentioned they were Sapphire..!
Additionally, I use a gaming headset whenever I play intense games.. so I'm not really phased by how much noise the computer makes!