Quote Originally Posted by gillekes View Post
The DHTG digital edition gets its signal in VGA. They are connected with minidp to VGA adapter from Apple. I think the ATI does not go beyond 2560 on analog video.
The DHTG digital edition works fine with micro tiles.
I might have to look in the DVI Parrot to see if I get this working with the DP edition.
no - true analogue vga video works at higher resolutions than mini dp.
the limit is on minidp - possibly apples version of its convertor

http://en.wikipedia.org/wiki/Mini_DisplayPort
http://forums.macrumors.com/showthread.php?t=634592

there are multiple complications with single and dual link dvi as well