Amateur review. Guru3d, Hardwareheaven among others had no issues with Crossfire in any of the games you did. sad to see a reviewer who cannot set up his system blame it on drivers. 7970 is amazing and fastest card in the world, improve your review skills for the future
Taken from that page about 5 posts down in the comments....
Deus Ex really needs crossfire scaling @ 2560x1600 where the minimum is 55fps
I also love how you left out that in Skyrim a single 7970 is faster than a GTX 590 at both 1920x1080 and 5760x1080. Acutally the 580 is faster than the 590 in skyrim too, I bet all those 590 owners are really disappointed nVidia hasn't fixed the scaling in skryim since they've had since 11.11.11 to do it.
It is worth pointing out that TPU did have some of the same scaling issues at 2560x1600 resolution only...whereas G3D did not have the issue.