Hey! Thank you for replying this quickly, but I'll sadly have to report that turning crossfire off and just running one card effectively causes the game to slow down so much it eventually freezes. Playing with both cards is, at the moment, the only way I can even get the game to keep running.
Like I have said before, I have tried everything. I have turned Origin in-game off and on again, I have tried performing a clean boot, I tried resetting my entire system, changing all kinds of settings in the bios, I have installed new drivers, hell, I have even tried to play with different peripherals. The only thing that's left for me to assume is that the game is severely bugged towards some versions of either drivers or specific setups of cards or processors, since I highly doubt my hardware could ever be THIS outdated, seeing as it runs other recent titles effortlessly.
It'd be nice if you guys had any more ideas, but as it is, and seeing more and more people complaining about similar issues, I think the only thing I can really hope for is an update to the game.
(Oh, and don't worry. I'm only a little bit pissed about the fact that the game I purchased for 60€ was unplayable from the second I installed it.)