I am an AMD user and it seems for at least my system AFR crossfire profiling fixed this issue.
So under CCC create a DAI application profile and at the bottom use the "AFR friendly" cross-fire profile. Based on my research what this goes is allows CCC (using a generic all purpose Crossfire profile) driver to control the graphics processing data instead of the default DAI corssfile profile.
Performance droped a bit but it seems WAY more stable, time will tell.
My system specs:
windows 8.1
i7-4820K
amd 7990 + 2x 7970ghz --> quad-fire setup
32GB 2133mhx ram
desktop resolution: 3240 x 1920 (3x1080p monitors in portrait)
