The Tech Report published a review on the Driver fix for CrossFire + Eyefinity/4K frame pacing issues coming this fall

A quote from the article:

I just spoke with Raja Koduri, the new head of graphics hardware and software development at AMD, who recently returned to the company after some time away. Koduri, incidentally, spearheaded the development of the original CrossFire implementation way back when.

In our talk, Koduri acknowledged that the frame delivery issues with CrossFire were "unfortunate," and he expressed a desire to make things right. Koduri told me AMD is working on a fix for CrossFire and single-large-surface display configurations, like Eyefinity and tiled 4K monitors, for current Radeon graphics cards. He said AMD plans to deliver a driver with the fix this fall.

 Driver fix for CrossFire + Eyefinity/4K frame pacing issues coming this fall @ The Tech Report