As you all know Unreal 4 engine does not officially support sli/crossfire and until now none of those games had a profile. That's changed as AMD realeased a profile for Paragon which run on UE4. I've tried this profile with Unreal Tournament, and I was surprised how well it ran the game, with only minor issues like flickering map or some ui. I guess there's hope having any crossfire support when AAA games start to come out with this engine. Fell free to experiment and tell your findings.