Power down the computer, remove the crossfire bridge, and hook each monitor up to each card independently, see if the problem is still there or goes away. If it goes away, attach both monitors to one card, and recheck, then check on the other card, If you duplicate the problem all 3 ways, I would say it could be a cable or the monitor. If it only happens when the crossfire bridge is attached, then try a new bridge, if that doesn't help, I would say you have a card acting.
Ok will try all that tonight, though right now the flickering has stopped on my smaller screen and is now on my larger screen, i feel like that confirms its my card....ugh. Pricy replacement, and the 7990s arent out yet