*
For the audio with DVI / ATI DVI/HDMI adapter the sound is automaticlty routed to the TV LCD
With DisplayPort + adapters the Realtel Manager send an alert to connect rear sound to TV or similar message
That is not a big problem ( i have 2 * HD5770 with 4 * DVI out  )
I think the problem is not with the active adapter but with the XFX graphics cards
Exist 2 models ( mine with 2 * DVI + 1 miniDP 150 euros ) and another model with 5 * displayPort for some 250 euros  
and that is possible that the EyeInfinity option is not programmed in BIOS with my low price cards !! 
I have not found infos in the documentation 
I have send a report to XFX  for this problem 
Pierre
