I had 2 7850s in Crossfire for over a year and out of the box it was pretty bad because of the microstutter. RadeonPro (http://www.radeonpro.info/) solved the microstutter problem in almost everygame except for a few. Far cry 3 was unplayable even with RadeonPro profile for example, but others really became smooth. Just thought i would share this for anyone thinking about getting another card
Here's a question/statement,
Do I really have uninstall then re-install drivers in the first step
Last time I had done that, it took me hours to get the tower working right again.(this guy's first bridge)