I'm looking to get one of these to replcae my KN9. I've had some decent results with this, in the 2.8GHz out of my 3800+ which I was pleased with, I was wondering if it would be able to replicate this sort of result with this CPU and what sort of results people have got with the Phenom, just to see what it's average clocking is.

Also, I believe it's Crossfire, I hear some boards are better than others with XFire, this give anyone problems?