As you can see in this thread
, CrossFireX mode is crashing on 79xx cards (it appears to be working fine with previous Radeon series). Not sure if the problem can be fixed by Remedy or AMD, but anyway you could take a look at that thread and grab the BSOD minidumps files generated. This happens when using the 12.1 CAP3 profiles, optimized for Alan Wake.
Another problem (this one minor): the game won't let us choose a bezel compensated resolution in EyeFinity. I have my desktop set at 5760x1080 (3x1920x1080), and have created a bezel compensated resolution of 6048x1080. I can choose 6048x1080 in every game that supports EyeFinity, except Alan Wake, the maximum is 5760x1080,