HKEPC, has successfully to decipher how the whole ATI Crossfire concept actually works. As a result, they are able to run two slaves cards in Crossfire without the need for the Crossfire edition master card.
The amazing feat they have done was to run X850, X700 and X300SE HM on Crossfire!
For More Info Warp2 .... techPowerUp
For More Info Warp2 .... techPowerUp