So my 5970 was running fine, then 1 day everything started running slower (namely BF4, but everything was affected). I checked CCC, and it stated that Crossfire wasn't enabled. I checked GPUz etc, so I uninstalled and installed newest 14.4 drivers.
I got Xfire working again (though only under 14.4/14.6 beta. I tried 13.9/13.12 to see if it would help, but Xfire ONLY works under 14.4 or 14.6).
However, now everything chugs while under Xfire. Dota 2, a game that worked flawlessly under Xfire now chugs while using Xfire....but runs fine when I disable Xfire under specific application settings in CCC. Other games like BF4 run horribly either way because one GPU isn't enough, and it lags while using Xfire.
Also I got 3350 points with Furmark's 1080p benchmark.
BTW I tried removing the GPU and reinserting it into the slot (2.0 x16 slot), and also tried putting it into another PCIe slot. The results were still x4/x8 in both cases. ALso checked my mobo settings to see if anything was up...but couldn't find anything (mobo is ASUS p8z68-v-pro)