The new cooler for RV770PRO card will be significantly smaller than the one that ATI plans to use with RV770XT card. The PRO fan has a 0.75-inch diameter (1.905 cm).
As you can see in the picture, the cooler looks like a single slot design, but this is something that we cannot confirm right now, although it makes perfect sense.
The cooler itself is about 17cm long on the longer side and a bit less on the bottom side of the cooler, but we don’t really know the right dimensions. Here is how it will look.