Asus HD 7950 DirectCU II
Asus' HD 7950 DirectCU II is the thickest card in today's round-up, monopolizing not two, but three expansion slots. We've seen the DirectCU II cooling solution work well in the past, though. So, depending on your motherboard and chassis, giving up that third slot might be worthwhile. Additional cooling headroom is capitalized on with another 900 MHz core clock rate.
Two large axial fans should yield quiet operation, though you're forced to accept heated air blown into your chassis.
The card doesn't have any heat pipes poking outside of its shroud, resulting in a clean system build. But be careful of its weight; we'd recommend using a graphics card bracket to hold it in place.