So here is my dilemma that i've been having for over a month. When running the most current amd drivers, my PC will freeze up with the sound looping while playing WoW at max settings. When running the card with the old drivers off the CD, the lock-ups go away but after waking up from sleep mode, I'll have terrible fps which is only curable by doing a restart.
Set the API to DX9, this is a known issue. I believe the issue isn't present with the 12.3 release, but it is there with the 12.7 beta and 12.4 release. I sent off a suggestion to AMD to fix this in future driver releases, if you can do the same that might get them to get the finger out. For now DX9 fixes the problem.
As a side note one of the Total War games has the same problem when ran in DX11 and it doesn't seem to affect the entire 7000 series. There is one or two other games being affected as well. Did a lot of research on this a few months back.