AMD cards for anything advanced are crap, they couldn't recogize one of my monitor (>2 monitor setup), and they're not playing fair with their AMF extension on Linux (works great on Windows though). Even on Windows, I cannot get the card to properly get my minitor resolutions (it's sitting beyond a multiplexer, though there no problem with nvidia).
Triple monitor on two physical screen, and no AMD cards do not work, in this case using the display port output and DVI->HDMI adapter, and yes, it works with a third physical monitor (not acceptable in my setup). Nvidia/nouveau are not showing these problems.
