I just wanted to make mention that in the 13.12 drivers it is not possible to use the two GPUs on a 5970 card. I've seen a couple other people on the internet with the problem. I assume they are still oblivious that their crossfire was disabled when they updated their drivers and are only aware of the low performance result of such.
Instead of working crossfire there is erroneous screen behaviour and detection though.
I have submitted an issue report to AMD (Although they don't even give you any confirmation that the mention went through).
The previous drivers do function properly but one must driver wipe to roll back.
Please don't suggest anything to help me solve the problem unless it's absoutely arcane or unusual to fix this problem as I have tried everything a tech/PC-savvy user would try.
I'm basically hoping someone with the power to improve this situation (at least in the next drivers) sees this post. Even if they are just someone to pass the message on.
I'm certain that someone at AMD could have the 5970 functioning fully in a few minutes. It would be nice if someone had a little hack.