is the hd radeon 4770 series and above crossfired (dual carded) or not?

[tigerkojiro]

I am trying to understand if the video benchmark for all the ati hd radeon 4770 series and above are crossfired or not?
It seems that for older series the X2 means that they are crossfired.

[David (PassMark)]

The presence, or not, of SLI or Crossfire doesn't have great impact on the results.

See this forum post for some additional details.