I was wondering if anyone has ever crossfired two 5770's on an ASRock M3A770DE motherboard. One thing I've been reading about is that one PCIE slot is 16x and the other is only 4x. I'm not really worried about that because there's a minimal drop in the performance since they aren't extremely high end cards.
The main questions I have about this are
1.) Will I have enough space on the MB?
2.) Will my PSU be sufficient?
3.) Will the heat from Crossfiring cook my computer?
The P965 and P35 are the boards you want to look at the performance of, as they have x16/x4 Crossfire. The P45 and X48, meanwhile, have full x16-x16 CFX.
While the chipsets have improved over the years, the point remains -- yes, you ARE going to lose some performance. A 5770 is powerful enough that a x8 bus is probably the minimum for it to reach its full potential.