And also I got problem installing CAL on my laptop.
When I click the first Next Button in the CAL installation (it is the right version for my Vista 32bit), a fatal error dialog pops up and said "Installation ended prematurely because of an error". dunno why...I've already upgraded drivers to catalyst to 9.2
There is a difference between not support and does not work. Any chip that is based on the R6XX architecture or higher should work, but not ever chip is supported and thus you might find bugs on the cards that we don't officially support.