CrossFire X explored
 

AMD's CrossFire X will let three or four Radeon HD 3800 GPUs team up in order to kick some green team backside. How well does it work? We've taken a quick look at AMD's first drivers for CrossFire X, we've talked with one of AMD's driver architects, and we have some interesting things to report.

http://techreport.com/articles.x/14284