5770 6770 crossfire scalability

What you mean by "Scaling"? Crossfire?

Yes, sorry I mean 5770 and 6770 in crossfire. I have seen on official spec sheets that they are crossfire compatible but was unable to find any reports on someone's experience in doing so.

They will scale in the same way the 5770's did
from what i've heard is the 6770 should be the master card. (top slot)
you should be seeing performance that will vary by game.
any reviews of the 5770 in crossfire will be the same as the 6770 and 5770 in cf

Alright, thank you for your input.

As far as I know, the two cards should be compatible since they have the same core structure and same features (like Dx11 and OpenGL 4.1) but maby the Default Catalyst driver won't allow it, if it doesn't work, try installing a modded Driver.