Here is the AMD list of validated dongles: http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx
However you are not limited to what you see there. If you are running only the two displays you do not need an active adaptor you can simply use a passive adaptor. If you do decide on an active adaptor anyway unless your resolution (of the one monitor) is above 1920 * 1080 you do not need a powered dongle (bizzlink or accell are the only powered ones I know that are readily available, they are identical just branded differently in different regions).
So to sum that up, essentially any dp-dvi adaptor will work for your situation (active, passive, powered, non-powered).